ncurses 6.2 - patch 20210710
[ncurses.git] / test / aclocal.m4
1 dnl***************************************************************************
2 dnl Copyright 2018-2020,2021 Thomas E. Dickey                                *
3 dnl Copyright 2003-2017,2018 Free Software Foundation, Inc.                  *
4 dnl                                                                          *
5 dnl Permission is hereby granted, free of charge, to any person obtaining a  *
6 dnl copy of this software and associated documentation files (the            *
7 dnl "Software"), to deal in the Software without restriction, including      *
8 dnl without limitation the rights to use, copy, modify, merge, publish,      *
9 dnl distribute, distribute with modifications, sublicense, and/or sell       *
10 dnl copies of the Software, and to permit persons to whom the Software is    *
11 dnl furnished to do so, subject to the following conditions:                 *
12 dnl                                                                          *
13 dnl The above copyright notice and this permission notice shall be included  *
14 dnl in all copies or substantial portions of the Software.                   *
15 dnl                                                                          *
16 dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 dnl OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 dnl IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20 dnl DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21 dnl OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 dnl THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 dnl                                                                          *
24 dnl Except as contained in this notice, the name(s) of the above copyright   *
25 dnl holders shall not be used in advertising or otherwise to promote the     *
26 dnl sale, use or other dealings in this Software without prior written       *
27 dnl authorization.                                                           *
28 dnl***************************************************************************
29 dnl
30 dnl $Id: aclocal.m4,v 1.197 2021/07/10 21:40:29 tom Exp $
31 dnl
32 dnl Author: Thomas E. Dickey
33 dnl
34 dnl Macros used in NCURSES test programs auto-configuration script.
35 dnl
36 dnl These macros are maintained separately from NCURSES.  The copyright on
37 dnl this file applies to the aggregation of macros and does not affect use of
38 dnl these macros in other applications.
39 dnl
40 dnl See these pages for additional information:
41 dnl             https://invisible-island.net/autoconf/
42 dnl             https://invisible-island.net/autoconf/my-autoconf.html
43 dnl
44 dnl ---------------------------------------------------------------------------
45 dnl ---------------------------------------------------------------------------
46 dnl AM_LANGINFO_CODESET version: 6 updated: 2021/01/01 16:53:59
47 dnl -------------------
48 dnl Inserted as requested by gettext 0.10.40
49 dnl File from /usr/share/aclocal
50 dnl codeset.m4
51 dnl ====================
52 dnl serial AM1
53 dnl
54 dnl From Bruno Haible.
55 AC_DEFUN([AM_LANGINFO_CODESET],
56 [
57 AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
58         [AC_TRY_LINK([#include <langinfo.h>],
59         [char* cs = nl_langinfo(CODESET); (void)cs],
60         am_cv_langinfo_codeset=yes,
61         am_cv_langinfo_codeset=no)
62         ])
63         if test "$am_cv_langinfo_codeset" = yes; then
64                 AC_DEFINE(HAVE_LANGINFO_CODESET, 1,
65                 [Define if you have <langinfo.h> and nl_langinfo(CODESET).])
66         fi
67 ])dnl
68 dnl ---------------------------------------------------------------------------
69 dnl CF_ACVERSION_CHECK version: 5 updated: 2014/06/04 19:11:49
70 dnl ------------------
71 dnl Conditionally generate script according to whether we're using a given autoconf.
72 dnl
73 dnl $1 = version to compare against
74 dnl $2 = code to use if AC_ACVERSION is at least as high as $1.
75 dnl $3 = code to use if AC_ACVERSION is older than $1.
76 define([CF_ACVERSION_CHECK],
77 [
78 ifdef([AC_ACVERSION], ,[ifdef([AC_AUTOCONF_VERSION],[m4_copy([AC_AUTOCONF_VERSION],[AC_ACVERSION])],[m4_copy([m4_PACKAGE_VERSION],[AC_ACVERSION])])])dnl
79 ifdef([m4_version_compare],
80 [m4_if(m4_version_compare(m4_defn([AC_ACVERSION]), [$1]), -1, [$3], [$2])],
81 [CF_ACVERSION_COMPARE(
82 AC_PREREQ_CANON(AC_PREREQ_SPLIT([$1])),
83 AC_PREREQ_CANON(AC_PREREQ_SPLIT(AC_ACVERSION)), AC_ACVERSION, [$2], [$3])])])dnl
84 dnl ---------------------------------------------------------------------------
85 dnl CF_ACVERSION_COMPARE version: 3 updated: 2012/10/03 18:39:53
86 dnl --------------------
87 dnl CF_ACVERSION_COMPARE(MAJOR1, MINOR1, TERNARY1,
88 dnl                      MAJOR2, MINOR2, TERNARY2,
89 dnl                      PRINTABLE2, not FOUND, FOUND)
90 define([CF_ACVERSION_COMPARE],
91 [ifelse(builtin([eval], [$2 < $5]), 1,
92 [ifelse([$8], , ,[$8])],
93 [ifelse([$9], , ,[$9])])])dnl
94 dnl ---------------------------------------------------------------------------
95 dnl CF_ADD_CFLAGS version: 15 updated: 2020/12/31 10:54:15
96 dnl -------------
97 dnl Copy non-preprocessor flags to $CFLAGS, preprocessor flags to $CPPFLAGS
98 dnl $1 = flags to add
99 dnl $2 = if given makes this macro verbose.
100 dnl
101 dnl Put any preprocessor definitions that use quoted strings in $EXTRA_CPPFLAGS,
102 dnl to simplify use of $CPPFLAGS in compiler checks, etc., that are easily
103 dnl confused by the quotes (which require backslashes to keep them usable).
104 AC_DEFUN([CF_ADD_CFLAGS],
105 [
106 cf_fix_cppflags=no
107 cf_new_cflags=
108 cf_new_cppflags=
109 cf_new_extra_cppflags=
110
111 for cf_add_cflags in $1
112 do
113 case "$cf_fix_cppflags" in
114 (no)
115         case "$cf_add_cflags" in
116         (-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
117                 case "$cf_add_cflags" in
118                 (-D*)
119                         cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^-D[[^=]]*='\''\"[[^"]]*//'`
120
121                         test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
122                                 && test -z "${cf_tst_cflags}" \
123                                 && cf_fix_cppflags=yes
124
125                         if test "$cf_fix_cppflags" = yes ; then
126                                 CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
127                                 continue
128                         elif test "${cf_tst_cflags}" = "\"'" ; then
129                                 CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
130                                 continue
131                         fi
132                         ;;
133                 esac
134                 case "$CPPFLAGS" in
135                 (*$cf_add_cflags)
136                         ;;
137                 (*)
138                         case "$cf_add_cflags" in
139                         (-D*)
140                                 cf_tst_cppflags=`echo "x$cf_add_cflags" | sed -e 's/^...//' -e 's/=.*//'`
141                                 CF_REMOVE_DEFINE(CPPFLAGS,$CPPFLAGS,$cf_tst_cppflags)
142                                 ;;
143                         esac
144                         CF_APPEND_TEXT(cf_new_cppflags,$cf_add_cflags)
145                         ;;
146                 esac
147                 ;;
148         (*)
149                 CF_APPEND_TEXT(cf_new_cflags,$cf_add_cflags)
150                 ;;
151         esac
152         ;;
153 (yes)
154         CF_APPEND_TEXT(cf_new_extra_cppflags,$cf_add_cflags)
155
156         cf_tst_cflags=`echo "${cf_add_cflags}" |sed -e 's/^[[^"]]*"'\''//'`
157
158         test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \
159                 && test -z "${cf_tst_cflags}" \
160                 && cf_fix_cppflags=no
161         ;;
162 esac
163 done
164
165 if test -n "$cf_new_cflags" ; then
166         ifelse([$2],,,[CF_VERBOSE(add to \$CFLAGS $cf_new_cflags)])
167         CF_APPEND_TEXT(CFLAGS,$cf_new_cflags)
168 fi
169
170 if test -n "$cf_new_cppflags" ; then
171         ifelse([$2],,,[CF_VERBOSE(add to \$CPPFLAGS $cf_new_cppflags)])
172         CF_APPEND_TEXT(CPPFLAGS,$cf_new_cppflags)
173 fi
174
175 if test -n "$cf_new_extra_cppflags" ; then
176         ifelse([$2],,,[CF_VERBOSE(add to \$EXTRA_CPPFLAGS $cf_new_extra_cppflags)])
177         CF_APPEND_TEXT(EXTRA_CPPFLAGS,$cf_new_extra_cppflags)
178 fi
179
180 AC_SUBST(EXTRA_CPPFLAGS)
181
182 ])dnl
183 dnl ---------------------------------------------------------------------------
184 dnl CF_ADD_INCDIR version: 16 updated: 2020/12/31 20:19:42
185 dnl -------------
186 dnl Add an include-directory to $CPPFLAGS.  Don't add /usr/include, since it's
187 dnl redundant.  We don't normally need to add -I/usr/local/include for gcc,
188 dnl but old versions (and some misinstalled ones) need that.  To make things
189 dnl worse, gcc 3.x may give error messages if -I/usr/local/include is added to
190 dnl the include-path).
191 AC_DEFUN([CF_ADD_INCDIR],
192 [
193 if test -n "$1" ; then
194   for cf_add_incdir in $1
195   do
196         while test "$cf_add_incdir" != /usr/include
197         do
198           if test -d "$cf_add_incdir"
199           then
200                 cf_have_incdir=no
201                 if test -n "$CFLAGS$CPPFLAGS" ; then
202                   # a loop is needed to ensure we can add subdirs of existing dirs
203                   for cf_test_incdir in $CFLAGS $CPPFLAGS ; do
204                         if test ".$cf_test_incdir" = ".-I$cf_add_incdir" ; then
205                           cf_have_incdir=yes; break
206                         fi
207                   done
208                 fi
209
210                 if test "$cf_have_incdir" = no ; then
211                   if test "$cf_add_incdir" = /usr/local/include ; then
212                         if test "$GCC" = yes
213                         then
214                           cf_save_CPPFLAGS=$CPPFLAGS
215                           CF_APPEND_TEXT(CPPFLAGS,-I$cf_add_incdir)
216                           AC_TRY_COMPILE([#include <stdio.h>],
217                                   [printf("Hello")],
218                                   [],
219                                   [cf_have_incdir=yes])
220                           CPPFLAGS=$cf_save_CPPFLAGS
221                         fi
222                   fi
223                 fi
224
225                 if test "$cf_have_incdir" = no ; then
226                   CF_VERBOSE(adding $cf_add_incdir to include-path)
227                   ifelse([$2],,CPPFLAGS,[$2])="$ifelse([$2],,CPPFLAGS,[$2]) -I$cf_add_incdir"
228
229                   cf_top_incdir=`echo "$cf_add_incdir" | sed -e 's%/include/.*$%/include%'`
230                   test "$cf_top_incdir" = "$cf_add_incdir" && break
231                   cf_add_incdir="$cf_top_incdir"
232                 else
233                   break
234                 fi
235           else
236                 break
237           fi
238         done
239   done
240 fi
241 ])dnl
242 dnl ---------------------------------------------------------------------------
243 dnl CF_ADD_LIB version: 2 updated: 2010/06/02 05:03:05
244 dnl ----------
245 dnl Add a library, used to enforce consistency.
246 dnl
247 dnl $1 = library to add, without the "-l"
248 dnl $2 = variable to update (default $LIBS)
249 AC_DEFUN([CF_ADD_LIB],[CF_ADD_LIBS(-l$1,ifelse($2,,LIBS,[$2]))])dnl
250 dnl ---------------------------------------------------------------------------
251 dnl CF_ADD_LIBDIR version: 11 updated: 2020/12/31 20:19:42
252 dnl -------------
253 dnl     Adds to the library-path
254 dnl
255 dnl     Some machines have trouble with multiple -L options.
256 dnl
257 dnl $1 is the (list of) directory(s) to add
258 dnl $2 is the optional name of the variable to update (default LDFLAGS)
259 dnl
260 AC_DEFUN([CF_ADD_LIBDIR],
261 [
262 if test -n "$1" ; then
263         for cf_add_libdir in $1
264         do
265                 if test "$cf_add_libdir" = /usr/lib ; then
266                         :
267                 elif test -d "$cf_add_libdir"
268                 then
269                         cf_have_libdir=no
270                         if test -n "$LDFLAGS$LIBS" ; then
271                                 # a loop is needed to ensure we can add subdirs of existing dirs
272                                 for cf_test_libdir in $LDFLAGS $LIBS ; do
273                                         if test ".$cf_test_libdir" = ".-L$cf_add_libdir" ; then
274                                                 cf_have_libdir=yes; break
275                                         fi
276                                 done
277                         fi
278                         if test "$cf_have_libdir" = no ; then
279                                 CF_VERBOSE(adding $cf_add_libdir to library-path)
280                                 ifelse([$2],,LDFLAGS,[$2])="-L$cf_add_libdir $ifelse([$2],,LDFLAGS,[$2])"
281                         fi
282                 fi
283         done
284 fi
285 ])dnl
286 dnl ---------------------------------------------------------------------------
287 dnl CF_ADD_LIBS version: 3 updated: 2019/11/02 16:47:33
288 dnl -----------
289 dnl Add one or more libraries, used to enforce consistency.  Libraries are
290 dnl prepended to an existing list, since their dependencies are assumed to
291 dnl already exist in the list.
292 dnl
293 dnl $1 = libraries to add, with the "-l", etc.
294 dnl $2 = variable to update (default $LIBS)
295 AC_DEFUN([CF_ADD_LIBS],[
296 cf_add_libs="[$]ifelse($2,,LIBS,[$2])"
297 # reverse order
298 cf_add_0lib=
299 for cf_add_1lib in $1; do cf_add_0lib="$cf_add_1lib $cf_add_0lib"; done
300 # filter duplicates
301 for cf_add_1lib in $cf_add_0lib; do
302         for cf_add_2lib in $cf_add_libs; do
303                 if test "x$cf_add_1lib" = "x$cf_add_2lib"; then
304                         cf_add_1lib=
305                         break
306                 fi
307         done
308         test -n "$cf_add_1lib" && cf_add_libs="$cf_add_1lib $cf_add_libs"
309 done
310 ifelse($2,,LIBS,[$2])="$cf_add_libs"
311 ])dnl
312 dnl ---------------------------------------------------------------------------
313 dnl CF_ADD_LIB_AFTER version: 3 updated: 2013/07/09 21:27:22
314 dnl ----------------
315 dnl Add a given library after another, e.g., following the one it satisfies a
316 dnl dependency for.
317 dnl
318 dnl $1 = the first library
319 dnl $2 = its dependency
320 AC_DEFUN([CF_ADD_LIB_AFTER],[
321 CF_VERBOSE(...before $LIBS)
322 LIBS=`echo "$LIBS" | sed -e "s/[[       ]][[    ]]*/ /g" -e "s%$1 %$1 $2 %" -e 's%  % %g'`
323 CF_VERBOSE(...after  $LIBS)
324 ])dnl
325 dnl ---------------------------------------------------------------------------
326 dnl CF_ADD_SUBDIR_PATH version: 5 updated: 2020/12/31 20:19:42
327 dnl ------------------
328 dnl Append to a search-list for a nonstandard header/lib-file
329 dnl     $1 = the variable to return as result
330 dnl     $2 = the package name
331 dnl     $3 = the subdirectory, e.g., bin, include or lib
332 dnl $4 = the directory under which we will test for subdirectories
333 dnl $5 = a directory that we do not want $4 to match
334 AC_DEFUN([CF_ADD_SUBDIR_PATH],
335 [
336 test "x$4" != "x$5" && \
337 test -d "$4" && \
338 ifelse([$5],NONE,,[{ test -z "$5" || test "x$5" = xNONE || test "x$4" != "x$5"; } &&]) {
339         test -n "$verbose" && echo "    ... testing for $3-directories under $4"
340         test -d "$4/$3" &&          $1="[$]$1 $4/$3"
341         test -d "$4/$3/$2" &&       $1="[$]$1 $4/$3/$2"
342         test -d "$4/$3/$2/$3" &&    $1="[$]$1 $4/$3/$2/$3"
343         test -d "$4/$2/$3" &&       $1="[$]$1 $4/$2/$3"
344         test -d "$4/$2/$3/$2" &&    $1="[$]$1 $4/$2/$3/$2"
345 }
346 ])dnl
347 dnl ---------------------------------------------------------------------------
348 dnl CF_APPEND_TEXT version: 1 updated: 2017/02/25 18:58:55
349 dnl --------------
350 dnl use this macro for appending text without introducing an extra blank at
351 dnl the beginning
352 define([CF_APPEND_TEXT],
353 [
354         test -n "[$]$1" && $1="[$]$1 "
355         $1="[$]{$1}$2"
356 ])dnl
357 dnl ---------------------------------------------------------------------------
358 dnl CF_ARG_DISABLE version: 3 updated: 1999/03/30 17:24:31
359 dnl --------------
360 dnl Allow user to disable a normally-on option.
361 AC_DEFUN([CF_ARG_DISABLE],
362 [CF_ARG_OPTION($1,[$2],[$3],[$4],yes)])dnl
363 dnl ---------------------------------------------------------------------------
364 dnl CF_ARG_ENABLE version: 3 updated: 1999/03/30 17:24:31
365 dnl -------------
366 dnl Allow user to enable a normally-off option.
367 AC_DEFUN([CF_ARG_ENABLE],
368 [CF_ARG_OPTION($1,[$2],[$3],[$4],no)])dnl
369 dnl ---------------------------------------------------------------------------
370 dnl CF_ARG_OPTION version: 5 updated: 2015/05/10 19:52:14
371 dnl -------------
372 dnl Restricted form of AC_ARG_ENABLE that ensures user doesn't give bogus
373 dnl values.
374 dnl
375 dnl Parameters:
376 dnl $1 = option name
377 dnl $2 = help-string
378 dnl $3 = action to perform if option is not default
379 dnl $4 = action if perform if option is default
380 dnl $5 = default option value (either 'yes' or 'no')
381 AC_DEFUN([CF_ARG_OPTION],
382 [AC_ARG_ENABLE([$1],[$2],[test "$enableval" != ifelse([$5],no,yes,no) && enableval=ifelse([$5],no,no,yes)
383         if test "$enableval" != "$5" ; then
384 ifelse([$3],,[    :]dnl
385 ,[    $3]) ifelse([$4],,,[
386         else
387                 $4])
388         fi],[enableval=$5 ifelse([$4],,,[
389         $4
390 ])dnl
391 ])])dnl
392 dnl ---------------------------------------------------------------------------
393 dnl CF_C11_NORETURN version: 3 updated: 2021/03/28 11:36:23
394 dnl ---------------
395 AC_DEFUN([CF_C11_NORETURN],
396 [
397 AC_MSG_CHECKING(if you want to use C11 _Noreturn feature)
398 CF_ARG_ENABLE(stdnoreturn,
399         [  --enable-stdnoreturn    enable C11 _Noreturn feature for diagnostics],
400         [enable_stdnoreturn=yes],
401         [enable_stdnoreturn=no])
402 AC_MSG_RESULT($enable_stdnoreturn)
403
404 if test $enable_stdnoreturn = yes; then
405 AC_CACHE_CHECK([for C11 _Noreturn feature], cf_cv_c11_noreturn,
406         [AC_TRY_COMPILE([
407 #include <stdio.h>
408 #include <stdlib.h>
409 #include <stdnoreturn.h>
410 static _Noreturn void giveup(void) { exit(0); }
411         ],
412         [if (feof(stdin)) giveup()],
413         cf_cv_c11_noreturn=yes,
414         cf_cv_c11_noreturn=no)
415         ])
416 else
417         cf_cv_c11_noreturn=no,
418 fi
419
420 if test "$cf_cv_c11_noreturn" = yes; then
421         AC_DEFINE(HAVE_STDNORETURN_H, 1,[Define if <stdnoreturn.h> header is available and working])
422         AC_DEFINE_UNQUOTED(STDC_NORETURN,_Noreturn,[Define if C11 _Noreturn keyword is supported])
423         HAVE_STDNORETURN_H=1
424 else
425         HAVE_STDNORETURN_H=0
426 fi
427
428 AC_SUBST(HAVE_STDNORETURN_H)
429 AC_SUBST(STDC_NORETURN)
430 ])dnl
431 dnl ---------------------------------------------------------------------------
432 dnl CF_CC_ENV_FLAGS version: 10 updated: 2020/12/31 18:40:20
433 dnl ---------------
434 dnl Check for user's environment-breakage by stuffing CFLAGS/CPPFLAGS content
435 dnl into CC.  This will not help with broken scripts that wrap the compiler
436 dnl with options, but eliminates a more common category of user confusion.
437 dnl
438 dnl In particular, it addresses the problem of being able to run the C
439 dnl preprocessor in a consistent manner.
440 dnl
441 dnl Caveat: this also disallows blanks in the pathname for the compiler, but
442 dnl the nuisance of having inconsistent settings for compiler and preprocessor
443 dnl outweighs that limitation.
444 AC_DEFUN([CF_CC_ENV_FLAGS],
445 [
446 # This should have been defined by AC_PROG_CC
447 : "${CC:=cc}"
448
449 AC_MSG_CHECKING(\$CFLAGS variable)
450 case "x$CFLAGS" in
451 (*-[[IUD]]*)
452         AC_MSG_RESULT(broken)
453         AC_MSG_WARN(your environment uses the CFLAGS variable to hold CPPFLAGS options)
454         cf_flags="$CFLAGS"
455         CFLAGS=
456         for cf_arg in $cf_flags
457         do
458                 CF_ADD_CFLAGS($cf_arg)
459         done
460         ;;
461 (*)
462         AC_MSG_RESULT(ok)
463         ;;
464 esac
465
466 AC_MSG_CHECKING(\$CC variable)
467 case "$CC" in
468 (*[[\ \ ]]-*)
469         AC_MSG_RESULT(broken)
470         AC_MSG_WARN(your environment uses the CC variable to hold CFLAGS/CPPFLAGS options)
471         # humor him...
472         cf_prog=`echo "$CC" | sed -e 's/        / /g' -e 's/[[ ]]* / /g' -e 's/[[ ]]*[[ ]]-[[^ ]].*//'`
473         cf_flags=`echo "$CC" | ${AWK:-awk} -v prog="$cf_prog" '{ printf("%s", [substr]([$]0,1+length(prog))); }'`
474         CC="$cf_prog"
475         for cf_arg in $cf_flags
476         do
477                 case "x$cf_arg" in
478                 (x-[[IUDfgOW]]*)
479                         CF_ADD_CFLAGS($cf_arg)
480                         ;;
481                 (*)
482                         CC="$CC $cf_arg"
483                         ;;
484                 esac
485         done
486         CF_VERBOSE(resulting CC: '$CC')
487         CF_VERBOSE(resulting CFLAGS: '$CFLAGS')
488         CF_VERBOSE(resulting CPPFLAGS: '$CPPFLAGS')
489         ;;
490 (*)
491         AC_MSG_RESULT(ok)
492         ;;
493 esac
494 ])dnl
495 dnl ---------------------------------------------------------------------------
496 dnl CF_CHECK_CACHE version: 13 updated: 2020/12/31 10:54:15
497 dnl --------------
498 dnl Check if we're accidentally using a cache from a different machine.
499 dnl Derive the system name, as a check for reusing the autoconf cache.
500 dnl
501 dnl If we've packaged config.guess and config.sub, run that (since it does a
502 dnl better job than uname).  Normally we'll use AC_CANONICAL_HOST, but allow
503 dnl an extra parameter that we may override, e.g., for AC_CANONICAL_SYSTEM
504 dnl which is useful in cross-compiles.
505 dnl
506 dnl Note: we would use $ac_config_sub, but that is one of the places where
507 dnl autoconf 2.5x broke compatibility with autoconf 2.13
508 AC_DEFUN([CF_CHECK_CACHE],
509 [
510 if test -f "$srcdir/config.guess" || test -f "$ac_aux_dir/config.guess" ; then
511         ifelse([$1],,[AC_CANONICAL_HOST],[$1])
512         system_name="$host_os"
513 else
514         system_name="`(uname -s -r) 2>/dev/null`"
515         if test -z "$system_name" ; then
516                 system_name="`(hostname) 2>/dev/null`"
517         fi
518 fi
519 test -n "$system_name" && AC_DEFINE_UNQUOTED(SYSTEM_NAME,"$system_name",[Define to the system name.])
520 AC_CACHE_VAL(cf_cv_system_name,[cf_cv_system_name="$system_name"])
521
522 test -z "$system_name" && system_name="$cf_cv_system_name"
523 test -n "$cf_cv_system_name" && AC_MSG_RESULT(Configuring for $cf_cv_system_name)
524
525 if test ".$system_name" != ".$cf_cv_system_name" ; then
526         AC_MSG_RESULT(Cached system name ($system_name) does not agree with actual ($cf_cv_system_name))
527         AC_MSG_ERROR("Please remove config.cache and try again.")
528 fi
529 ])dnl
530 dnl ---------------------------------------------------------------------------
531 dnl CF_CHECK_CFLAGS version: 4 updated: 2021/01/02 19:22:58
532 dnl ---------------
533 dnl Conditionally add to $CFLAGS and $CPPFLAGS values which are derived from
534 dnl a build-configuration such as imake.  These have the pitfall that they
535 dnl often contain compiler-specific options which we cannot use, mixed with
536 dnl preprocessor options that we usually can.
537 AC_DEFUN([CF_CHECK_CFLAGS],
538 [
539 CF_VERBOSE(checking additions to CFLAGS)
540 cf_check_cflags="$CFLAGS"
541 cf_check_cppflags="$CPPFLAGS"
542 CF_ADD_CFLAGS($1,yes)
543 if test "x$cf_check_cflags" != "x$CFLAGS" ; then
544 AC_TRY_LINK([#include <stdio.h>],[printf("Hello world");],,
545         [CF_VERBOSE(test-compile failed.  Undoing change to \$CFLAGS)
546          if test "x$cf_check_cppflags" != "x$CPPFLAGS" ; then
547                  CF_VERBOSE(but keeping change to \$CPPFLAGS)
548          fi
549          CFLAGS="$cf_check_cflags"])
550 fi
551 ])dnl
552 dnl ---------------------------------------------------------------------------
553 dnl CF_CHECK_CURSES_LIB version: 3 updated: 2021/01/04 19:45:09
554 dnl -------------------
555 dnl $1 = nominal library name, used also for header lookup
556 dnl $2 = suffix to append to library name
557 dnl $3 = function to check for using AC_CHECK_LIB
558 dnl $4 = optional parameter list for $3
559 AC_DEFUN([CF_CHECK_CURSES_LIB],
560 [
561 AC_REQUIRE([CF_PKG_CONFIG])
562
563 cf_have_curses_lib=no
564
565 : ${NCURSES_CONFIG_PKG:=none}
566 if test "x${NCURSES_CONFIG_PKG}" = xnone; then
567         :
568 elif test "x${PKG_CONFIG:=none}" != xnone; then
569         AC_MSG_CHECKING(pkg-config for $1$2)
570         if "$PKG_CONFIG" --exists "$1$2" ; then
571                 AC_MSG_RESULT(yes)
572
573                 AC_MSG_CHECKING(if the $1$2 package files work)
574
575                 cf_save_CPPFLAGS="$CPPFLAGS"
576                 cf_save_LIBS="$LIBS"
577
578                 CF_ADD_CFLAGS(`$PKG_CONFIG --cflags "$1$2"`)
579                 CF_ADD_LIBS(`$PKG_CONFIG --libs "$1$2"`)
580
581                 AC_TRY_LINK([#include <$1.h>],
582                         [(void) $3 ( ]ifelse([$4],,,[[$4]])[ );],
583                         [AC_TRY_RUN([#include <$1.h>
584                                 int main(void)
585                                 { (void) $3 ( ]ifelse([$4],,,[[$4]])[ ); return 0; }],
586                                 [cf_have_curses_lib=yes],
587                                 [cf_have_curses_lib=no],
588                                 [cf_have_curses_lib=maybe])],
589                         [cf_have_curses_lib=no])
590                 AC_MSG_RESULT($cf_have_curses_lib)
591                 test "$cf_have_curses_lib" = maybe && cf_have_curses_lib=yes
592                 if test "$cf_have_curses_lib" != "yes"
593                 then
594                         CPPFLAGS="$cf_save_CPPFLAGS"
595                         LIBS="$cf_save_LIBS"
596                 else
597                         CF_UPPER(cf_upper,have_lib$1)
598                         AC_DEFINE_UNQUOTED($cf_upper,1)
599                 fi
600         fi
601 fi
602 if test "$cf_have_curses_lib" = no; then
603         AC_CHECK_LIB($1$2,$3,[
604                 CF_UPPER(cf_upper,have_lib$1)
605                 CF_ADD_LIBS(-l$1$2)
606                 AC_DEFINE_UNQUOTED($cf_upper,1)])
607 fi
608 ])dnl
609 dnl ---------------------------------------------------------------------------
610 dnl CF_CLANG_COMPILER version: 8 updated: 2021/01/01 13:31:04
611 dnl -----------------
612 dnl Check if the given compiler is really clang.  clang's C driver defines
613 dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
614 dnl not ignore some gcc options.
615 dnl
616 dnl This macro should be run "soon" after AC_PROG_CC or AC_PROG_CPLUSPLUS, to
617 dnl ensure that it is not mistaken for gcc/g++.  It is normally invoked from
618 dnl the wrappers for gcc and g++ warnings.
619 dnl
620 dnl $1 = GCC (default) or GXX
621 dnl $2 = CLANG_COMPILER (default)
622 dnl $3 = CFLAGS (default) or CXXFLAGS
623 AC_DEFUN([CF_CLANG_COMPILER],[
624 ifelse([$2],,CLANG_COMPILER,[$2])=no
625
626 if test "$ifelse([$1],,[$1],GCC)" = yes ; then
627         AC_MSG_CHECKING(if this is really Clang ifelse([$1],GXX,C++,C) compiler)
628         cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
629         AC_TRY_COMPILE([],[
630 #ifdef __clang__
631 #else
632 make an error
633 #endif
634 ],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
635 ],[])
636         ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
637         AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
638 fi
639
640 CLANG_VERSION=none
641
642 if test "x$ifelse([$2],,CLANG_COMPILER,[$2])" = "xyes" ; then
643         case "$CC" in
644         (c[[1-9]][[0-9]]|*/c[[1-9]][[0-9]])
645                 AC_MSG_WARN(replacing broken compiler alias $CC)
646                 CFLAGS="$CFLAGS -std=`echo "$CC" | sed -e 's%.*/%%'`"
647                 CC=clang
648                 ;;
649         esac
650
651         AC_MSG_CHECKING(version of $CC)
652         CLANG_VERSION="`$CC --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(CLANG[[^)]]*) //' -e 's/^.*(Debian[[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
653         test -z "$CLANG_VERSION" && CLANG_VERSION=unknown
654         AC_MSG_RESULT($CLANG_VERSION)
655
656         for cf_clang_opt in \
657                 -Qunused-arguments \
658                 -Wno-error=implicit-function-declaration
659         do
660                 AC_MSG_CHECKING(if option $cf_clang_opt works)
661                 cf_save_CFLAGS="$CFLAGS"
662                 CFLAGS="$CFLAGS $cf_clang_opt"
663                 AC_TRY_LINK([
664                         #include <stdio.h>],[
665                         printf("hello!\\n");],[
666                         cf_clang_optok=yes],[
667                         cf_clang_optok=no])
668                 AC_MSG_RESULT($cf_clang_optok)
669                 CFLAGS="$cf_save_CFLAGS"
670                 if test "$cf_clang_optok" = yes; then
671                         CF_VERBOSE(adding option $cf_clang_opt)
672                         CF_APPEND_TEXT(CFLAGS,$cf_clang_opt)
673                 fi
674         done
675 fi
676 ])
677 dnl ---------------------------------------------------------------------------
678 dnl CF_CONST_X_STRING version: 7 updated: 2021/06/07 17:39:17
679 dnl -----------------
680 dnl The X11R4-X11R6 Xt specification uses an ambiguous String type for most
681 dnl character-strings.
682 dnl
683 dnl It is ambiguous because the specification accommodated the pre-ANSI
684 dnl compilers bundled by more than one vendor in lieu of providing a standard C
685 dnl compiler other than by costly add-ons.  Because of this, the specification
686 dnl did not take into account the use of const for telling the compiler that
687 dnl string literals would be in readonly memory.
688 dnl
689 dnl As a workaround, one could (starting with X11R5) define XTSTRINGDEFINES, to
690 dnl let the compiler decide how to represent Xt's strings which were #define'd.
691 dnl That does not solve the problem of using the block of Xt's strings which
692 dnl are compiled into the library (and is less efficient than one might want).
693 dnl
694 dnl Xt specification 7 introduces the _CONST_X_STRING symbol which is used both
695 dnl when compiling the library and compiling using the library, to tell the
696 dnl compiler that String is const.
697 AC_DEFUN([CF_CONST_X_STRING],
698 [
699 AC_REQUIRE([AC_PATH_XTRA])
700
701 CF_SAVE_XTRA_FLAGS([CF_CONST_X_STRING])
702
703 AC_TRY_COMPILE(
704 [
705 #include <stdlib.h>
706 #include <X11/Intrinsic.h>
707 ],
708 [String foo = malloc(1); free((void*)foo)],[
709
710 AC_CACHE_CHECK(for X11/Xt const-feature,cf_cv_const_x_string,[
711         AC_TRY_COMPILE(
712                 [
713 #define _CONST_X_STRING /* X11R7.8 (perhaps) */
714 #undef  XTSTRINGDEFINES /* X11R5 and later */
715 #include <stdlib.h>
716 #include <X11/Intrinsic.h>
717                 ],[String foo = malloc(1); *foo = 0],[
718                         cf_cv_const_x_string=no
719                 ],[
720                         cf_cv_const_x_string=yes
721                 ])
722 ])
723
724 CF_RESTORE_XTRA_FLAGS([CF_CONST_X_STRING])
725
726 case "$cf_cv_const_x_string" in
727 (no)
728         CF_APPEND_TEXT(CPPFLAGS,-DXTSTRINGDEFINES)
729         ;;
730 (*)
731         CF_APPEND_TEXT(CPPFLAGS,-D_CONST_X_STRING)
732         ;;
733 esac
734
735 ])
736 ])dnl
737 dnl ---------------------------------------------------------------------------
738 dnl CF_CURSES_ACS_MAP version: 8 updated: 2021/01/04 19:45:09
739 dnl -----------------
740 dnl Check for likely values of acs_map[]:
741 AC_DEFUN([CF_CURSES_ACS_MAP],
742 [
743 AC_REQUIRE([CF_NCURSES_WRAP_PREFIX])dnl
744 AC_CACHE_CHECK(for alternate character set array, cf_cv_curses_acs_map,[
745 cf_cv_curses_acs_map=unknown
746 for name in acs_map _acs_map __acs_map ${NCURSES_WRAP_PREFIX}acs_map
747 do
748 AC_TRY_LINK([
749 #include <${cf_cv_ncurses_header:-curses.h}>
750 ],[
751 ${name}['k'] = ACS_PLUS
752 ],[cf_cv_curses_acs_map=$name; break])
753 done
754 ])
755
756 test "$cf_cv_curses_acs_map" != unknown && AC_DEFINE_UNQUOTED(CURSES_ACS_ARRAY,$cf_cv_curses_acs_map,[Define as needed to override ncurses prefix _nc_])
757 ])
758 dnl ---------------------------------------------------------------------------
759 dnl CF_CURSES_CHECK_DATA version: 10 updated: 2021/01/04 19:45:09
760 dnl --------------------
761 dnl Check if curses.h defines the given data/variable.
762 dnl Use this after CF_NCURSES_CONFIG or CF_CURSES_CONFIG.
763 dnl
764 dnl $1 = data item(s) to check for
765 dnl $2 = action on success, e.g., "break" to quit checking a series of choices
766 AC_DEFUN([CF_CURSES_CHECK_DATA],
767 [
768 for cf_data in $1
769 do
770 AC_MSG_CHECKING(for data $cf_data declaration in ${cf_cv_ncurses_header:-curses.h})
771
772 AC_TRY_COMPILE(CF__CURSES_HEAD,
773 CF__CURSES_DATA(foo,$cf_data)
774 ,[cf_result=yes
775 ],[cf_result=no])
776 AC_MSG_RESULT($cf_result)
777
778 if test "$cf_result" = yes ; then
779         CF_UPPER(cf_result,have_curses_data_$cf_data)
780         AC_DEFINE_UNQUOTED($cf_result)
781         ifelse($2,,,[$2])
782 else
783         AC_MSG_CHECKING(for data $cf_data in library)
784         # BSD linkers insist on making weak linkage, but resolve at runtime.
785         AC_TRY_RUN(CF__CURSES_HEAD
786 [
787 extern char $cf_data;
788 int main(void)
789 {
790         ]CF__CURSES_DATA(foo,$cf_data)[
791         ${cf_cv_main_return:-return}(foo == 0);
792 }],[cf_result=yes
793 ],[cf_result=no],[
794         # cross-compiling
795         AC_TRY_LINK(CF__CURSES_HEAD
796 [extern char $cf_data;],[
797         do {
798                 ]CF__CURSES_DATA(foo,$cf_data)[
799                 ${cf_cv_main_return:-return}(foo == 0);
800         } while (0)
801 ],[cf_result=yes],[cf_result=no])
802 ])
803         AC_MSG_RESULT($cf_result)
804         if test "$cf_result" = yes ; then
805                 CF_UPPER(cf_result,decl_curses_data_$cf_data)
806                 AC_DEFINE_UNQUOTED($cf_result)
807                 # do not exit loop here, since we prefer system's declarations
808         fi
809 fi
810 done
811 ])dnl
812 dnl ---------------------------------------------------------------------------
813 dnl CF_CURSES_CHECK_TYPE version: 5 updated: 2021/01/04 19:45:09
814 dnl --------------------
815 dnl Check if curses.h defines the given type
816 AC_DEFUN([CF_CURSES_CHECK_TYPE],
817 [
818 AC_MSG_CHECKING(for type $1 in ${cf_cv_ncurses_header:-curses.h})
819 AC_TRY_COMPILE([
820 #ifndef _XOPEN_SOURCE_EXTENDED
821 #define _XOPEN_SOURCE_EXTENDED
822 #endif
823 #include <${cf_cv_ncurses_header:-curses.h}>],[
824 $1 foo
825 ],cf_result=yes,cf_result=no)
826 AC_MSG_RESULT($cf_result)
827 if test "$cf_result" = yes ; then
828         CF_UPPER(cf_result,have_type_$1)
829         AC_DEFINE_UNQUOTED($cf_result,1,[Define to 1 if we have type $1])
830 else
831         AC_DEFINE_UNQUOTED($1,$2,[Define to appropriate type if $1 is not declared])
832 fi
833 ])dnl
834 dnl ---------------------------------------------------------------------------
835 dnl CF_CURSES_CONFIG version: 2 updated: 2006/10/29 11:06:27
836 dnl ----------------
837 dnl Tie together the configure-script macros for curses.  It may be ncurses,
838 dnl but unless asked, we do not make a special search for ncurses.  However,
839 dnl still check for the ncurses version number, for use in other macros.
840 AC_DEFUN([CF_CURSES_CONFIG],
841 [
842 CF_CURSES_CPPFLAGS
843 CF_NCURSES_VERSION
844 CF_CURSES_LIBS
845 ])dnl
846 dnl ---------------------------------------------------------------------------
847 dnl CF_CURSES_CPPFLAGS version: 14 updated: 2021/01/02 09:31:20
848 dnl ------------------
849 dnl Look for the curses headers.
850 AC_DEFUN([CF_CURSES_CPPFLAGS],[
851
852 AC_CACHE_CHECK(for extra include directories,cf_cv_curses_incdir,[
853 cf_cv_curses_incdir=no
854 case "$host_os" in
855 (hpux10.*)
856         if test "x$cf_cv_screen" = "xcurses_colr"
857         then
858                 test -d /usr/include/curses_colr && \
859                 cf_cv_curses_incdir="-I/usr/include/curses_colr"
860         fi
861         ;;
862 (sunos3*|sunos4*)
863         if test "x$cf_cv_screen" = "xcurses_5lib"
864         then
865                 test -d /usr/5lib && \
866                 test -d /usr/5include && \
867                 cf_cv_curses_incdir="-I/usr/5include"
868         fi
869         ;;
870 esac
871 ])
872 if test "$cf_cv_curses_incdir" != no
873 then
874         CF_APPEND_TEXT(CPPFLAGS,$cf_cv_curses_incdir)
875 fi
876
877 CF_CURSES_HEADER
878 CF_TERM_HEADER
879 ])dnl
880 dnl ---------------------------------------------------------------------------
881 dnl CF_CURSES_FUNCS version: 20 updated: 2020/12/31 20:19:42
882 dnl ---------------
883 dnl Curses-functions are a little complicated, since a lot of them are macros.
884 AC_DEFUN([CF_CURSES_FUNCS],
885 [
886 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
887 AC_REQUIRE([CF_XOPEN_CURSES])
888 AC_REQUIRE([CF_CURSES_TERM_H])
889 AC_REQUIRE([CF_CURSES_UNCTRL_H])
890 for cf_func in $1
891 do
892         CF_UPPER(cf_tr_func,$cf_func)
893         AC_MSG_CHECKING(for ${cf_func})
894         CF_MSG_LOG(${cf_func})
895         AC_CACHE_VAL(cf_cv_func_$cf_func,[
896                 eval cf_result='$ac_cv_func_'$cf_func
897                 if test ".$cf_result" != ".no"; then
898                         AC_TRY_LINK(CF__CURSES_HEAD,
899                         [
900 #ifndef ${cf_func}
901 long foo = (long)(&${cf_func});
902 fprintf(stderr, "testing linkage of $cf_func:%p\\n", (void *)foo);
903 if (foo + 1234L > 5678L)
904         ${cf_cv_main_return:-return}(foo != 0);
905 #endif
906                         ],
907                         [cf_result=yes],
908                         [cf_result=no])
909                 fi
910                 eval 'cf_cv_func_'$cf_func'="$cf_result"'
911         ])
912         # use the computed/retrieved cache-value:
913         eval 'cf_result=$cf_cv_func_'$cf_func
914         AC_MSG_RESULT($cf_result)
915         if test "$cf_result" != no; then
916                 AC_DEFINE_UNQUOTED(HAVE_${cf_tr_func})
917         fi
918 done
919 ])dnl
920 dnl ---------------------------------------------------------------------------
921 dnl CF_CURSES_HEADER version: 5 updated: 2015/04/23 20:35:30
922 dnl ----------------
923 dnl Find a "curses" header file, e.g,. "curses.h", or one of the more common
924 dnl variations of ncurses' installs.
925 dnl
926 dnl $1 = ncurses when looking for ncurses, or is empty
927 AC_DEFUN([CF_CURSES_HEADER],[
928 AC_CACHE_CHECK(if we have identified curses headers,cf_cv_ncurses_header,[
929 cf_cv_ncurses_header=none
930 for cf_header in \
931         ncurses.h ifelse($1,,,[$1/ncurses.h]) \
932         curses.h ifelse($1,,,[$1/curses.h]) ifelse($1,,[ncurses/ncurses.h ncurses/curses.h])
933 do
934 AC_TRY_COMPILE([#include <${cf_header}>],
935         [initscr(); tgoto("?", 0,0)],
936         [cf_cv_ncurses_header=$cf_header; break],[])
937 done
938 ])
939
940 if test "$cf_cv_ncurses_header" = none ; then
941         AC_MSG_ERROR(No curses header-files found)
942 fi
943
944 # cheat, to get the right #define's for HAVE_NCURSES_H, etc.
945 AC_CHECK_HEADERS($cf_cv_ncurses_header)
946 ])dnl
947 dnl ---------------------------------------------------------------------------
948 dnl CF_CURSES_LIBS version: 44 updated: 2021/01/02 09:31:20
949 dnl --------------
950 dnl Look for the curses libraries.  Older curses implementations may require
951 dnl termcap/termlib to be linked as well.  Call CF_CURSES_CPPFLAGS first.
952 AC_DEFUN([CF_CURSES_LIBS],[
953
954 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
955 AC_MSG_CHECKING(if we have identified curses libraries)
956 AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
957         [initscr(); tgoto("?", 0,0)],
958         cf_result=yes,
959         cf_result=no)
960 AC_MSG_RESULT($cf_result)
961
962 if test "$cf_result" = no ; then
963 case "$host_os" in
964 (freebsd*)
965         AC_CHECK_LIB(mytinfo,tgoto,[CF_ADD_LIBS(-lmytinfo)])
966         ;;
967 (hpux10.*)
968         # Looking at HPUX 10.20, the Hcurses library is the oldest (1997), cur_colr
969         # next (1998), and xcurses "newer" (2000).  There is no header file for
970         # Hcurses; the subdirectory curses_colr has the headers (curses.h and
971         # term.h) for cur_colr
972         if test "x$cf_cv_screen" = "xcurses_colr"
973         then
974                 AC_CHECK_LIB(cur_colr,initscr,[
975                         CF_ADD_LIBS(-lcur_colr)
976                         ac_cv_func_initscr=yes
977                         ],[
978                 AC_CHECK_LIB(Hcurses,initscr,[
979                         # HP's header uses __HP_CURSES, but user claims _HP_CURSES.
980                         CF_ADD_LIBS(-lHcurses)
981                         CF_APPEND_TEXT(CPPFLAGS,-D__HP_CURSES -D_HP_CURSES)
982                         ac_cv_func_initscr=yes
983                         ])])
984         fi
985         ;;
986 (linux*)
987         case `arch 2>/dev/null` in
988         (x86_64)
989                 if test -d /lib64
990                 then
991                         CF_ADD_LIBDIR(/lib64)
992                 else
993                         CF_ADD_LIBDIR(/lib)
994                 fi
995                 ;;
996         (*)
997                 CF_ADD_LIBDIR(/lib)
998                 ;;
999         esac
1000         ;;
1001 (sunos3*|sunos4*)
1002         if test "x$cf_cv_screen" = "xcurses_5lib"
1003         then
1004                 if test -d /usr/5lib ; then
1005                         CF_ADD_LIBDIR(/usr/5lib)
1006                         CF_ADD_LIBS(-lcurses -ltermcap)
1007                 fi
1008         fi
1009         ac_cv_func_initscr=yes
1010         ;;
1011 esac
1012
1013 if test ".$ac_cv_func_initscr" != .yes ; then
1014         cf_save_LIBS="$LIBS"
1015
1016         if test ".${cf_cv_ncurses_version:-no}" != .no
1017         then
1018                 cf_check_list="ncurses curses cursesX"
1019         else
1020                 cf_check_list="cursesX curses ncurses"
1021         fi
1022
1023         # Check for library containing tgoto.  Do this before curses library
1024         # because it may be needed to link the test-case for initscr.
1025         if test "x$cf_term_lib" = x
1026         then
1027                 AC_CHECK_FUNC(tgoto,[cf_term_lib=predefined],[
1028                         for cf_term_lib in $cf_check_list otermcap termcap tinfo termlib unknown
1029                         do
1030                                 AC_CHECK_LIB($cf_term_lib,tgoto,[
1031                                         : "${cf_nculib_root:=$cf_term_lib}"
1032                                         break
1033                                 ])
1034                         done
1035                 ])
1036         fi
1037
1038         # Check for library containing initscr
1039         test "$cf_term_lib" != predefined && test "$cf_term_lib" != unknown && LIBS="-l$cf_term_lib $cf_save_LIBS"
1040         if test "x$cf_curs_lib" = x
1041         then
1042                 for cf_curs_lib in $cf_check_list xcurses jcurses pdcurses unknown
1043                 do
1044                         LIBS="-l$cf_curs_lib $cf_save_LIBS"
1045                         if test "$cf_term_lib" = unknown || test "$cf_term_lib" = "$cf_curs_lib" ; then
1046                                 AC_MSG_CHECKING(if we can link with $cf_curs_lib library)
1047                                 AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
1048                                         [initscr()],
1049                                         [cf_result=yes],
1050                                         [cf_result=no])
1051                                 AC_MSG_RESULT($cf_result)
1052                                 test "$cf_result" = yes && break
1053                         elif test "$cf_curs_lib" = "$cf_term_lib" ; then
1054                                 cf_result=no
1055                         elif test "$cf_term_lib" != predefined ; then
1056                                 AC_MSG_CHECKING(if we need both $cf_curs_lib and $cf_term_lib libraries)
1057                                 AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
1058                                         [initscr(); tgoto((char *)0, 0, 0);],
1059                                         [cf_result=no],
1060                                         [
1061                                         LIBS="-l$cf_curs_lib -l$cf_term_lib $cf_save_LIBS"
1062                                         AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
1063                                                 [initscr()],
1064                                                 [cf_result=yes],
1065                                                 [cf_result=error])
1066                                         ])
1067                                 AC_MSG_RESULT($cf_result)
1068                                 test "$cf_result" != error && break
1069                         fi
1070                 done
1071         fi
1072         test "$cf_curs_lib" = unknown && AC_MSG_ERROR(no curses library found)
1073 fi
1074 fi
1075
1076 ])dnl
1077 dnl ---------------------------------------------------------------------------
1078 dnl CF_CURSES_TERM_H version: 15 updated: 2021/01/02 09:31:20
1079 dnl ----------------
1080 dnl SVr4 curses should have term.h as well (where it puts the definitions of
1081 dnl the low-level interface).  This may not be true in old/broken implementations,
1082 dnl as well as in misconfigured systems (e.g., gcc configured for Solaris 2.4
1083 dnl running with Solaris 2.5.1).
1084 AC_DEFUN([CF_CURSES_TERM_H],
1085 [
1086 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
1087
1088 AC_CACHE_CHECK(for term.h, cf_cv_term_header,[
1089
1090 # If we found <ncurses/curses.h>, look for <ncurses/term.h>, but always look
1091 # for <term.h> if we do not find the variant.
1092
1093 cf_header_list="term.h ncurses/term.h ncursesw/term.h"
1094
1095 case "${cf_cv_ncurses_header:-curses.h}" in
1096 (*/*)
1097         cf_header_item=`echo "${cf_cv_ncurses_header:-curses.h}" | sed -e 's%\..*%%' -e 's%/.*%/%'`term.h
1098         cf_header_list="$cf_header_item $cf_header_list"
1099         ;;
1100 esac
1101
1102 for cf_header in $cf_header_list
1103 do
1104         AC_TRY_COMPILE([
1105 #include <${cf_cv_ncurses_header:-curses.h}>
1106 #include <${cf_header}>],
1107         [WINDOW *x; (void)x],
1108         [cf_cv_term_header=$cf_header
1109          break],
1110         [cf_cv_term_header=no])
1111 done
1112
1113 case "$cf_cv_term_header" in
1114 (no)
1115         # If curses is ncurses, some packagers still mess it up by trying to make
1116         # us use GNU termcap.  This handles the most common case.
1117         for cf_header in ncurses/term.h ncursesw/term.h
1118         do
1119                 AC_TRY_COMPILE([
1120 #include <${cf_cv_ncurses_header:-curses.h}>
1121 #ifdef NCURSES_VERSION
1122 #include <${cf_header}>
1123 #else
1124 make an error
1125 #endif],
1126                         [WINDOW *x; (void)x],
1127                         [cf_cv_term_header=$cf_header
1128                          break],
1129                         [cf_cv_term_header=no])
1130         done
1131         ;;
1132 esac
1133 ])
1134
1135 case "$cf_cv_term_header" in
1136 (term.h)
1137         AC_DEFINE(HAVE_TERM_H,1,[Define to 1 if we have term.h])
1138         ;;
1139 (ncurses/term.h)
1140         AC_DEFINE(HAVE_NCURSES_TERM_H,1,[Define to 1 if we have ncurses/term.h])
1141         ;;
1142 (ncursesw/term.h)
1143         AC_DEFINE(HAVE_NCURSESW_TERM_H,1,[Define to 1 if we have ncursesw/term.h])
1144         ;;
1145 esac
1146 ])dnl
1147 dnl ---------------------------------------------------------------------------
1148 dnl CF_CURSES_UNCTRL_H version: 8 updated: 2021/01/02 09:31:20
1149 dnl ------------------
1150 dnl Any X/Open curses implementation must have unctrl.h, but ncurses packages
1151 dnl may put it in a subdirectory (along with ncurses' other headers, of
1152 dnl course).  Packages which put the headers in inconsistent locations are
1153 dnl broken).
1154 AC_DEFUN([CF_CURSES_UNCTRL_H],
1155 [
1156 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
1157
1158 AC_CACHE_CHECK(for unctrl.h, cf_cv_unctrl_header,[
1159
1160 # If we found <ncurses/curses.h>, look for <ncurses/unctrl.h>, but always look
1161 # for <unctrl.h> if we do not find the variant.
1162
1163 cf_header_list="unctrl.h ncurses/unctrl.h ncursesw/unctrl.h"
1164
1165 case "${cf_cv_ncurses_header:-curses.h}" in
1166 (*/*)
1167         cf_header_item=`echo "${cf_cv_ncurses_header:-curses.h}" | sed -e 's%\..*%%' -e 's%/.*%/%'`unctrl.h
1168         cf_header_list="$cf_header_item $cf_header_list"
1169         ;;
1170 esac
1171
1172 for cf_header in $cf_header_list
1173 do
1174         AC_TRY_COMPILE([
1175 #include <${cf_cv_ncurses_header:-curses.h}>
1176 #include <${cf_header}>],
1177         [WINDOW *x; (void)x],
1178         [cf_cv_unctrl_header=$cf_header
1179          break],
1180         [cf_cv_unctrl_header=no])
1181 done
1182 ])
1183
1184 case "$cf_cv_unctrl_header" in
1185 (no)
1186         AC_MSG_WARN(unctrl.h header not found)
1187         ;;
1188 esac
1189
1190 case "$cf_cv_unctrl_header" in
1191 (unctrl.h)
1192         AC_DEFINE(HAVE_UNCTRL_H,1,[Define to 1 if we have unctrl.h])
1193         ;;
1194 (ncurses/unctrl.h)
1195         AC_DEFINE(HAVE_NCURSES_UNCTRL_H,1,[Define to 1 if we have ncurses/unctrl.h])
1196         ;;
1197 (ncursesw/unctrl.h)
1198         AC_DEFINE(HAVE_NCURSESW_UNCTRL_H,1,[Define to 1 if we have ncursesw/unctrl.h])
1199         ;;
1200 esac
1201 ])dnl
1202 dnl ---------------------------------------------------------------------------
1203 dnl CF_CURSES_WACS_MAP version: 8 updated: 2021/01/04 19:45:09
1204 dnl ------------------
1205 dnl Check for likely values of wacs_map[].
1206 AC_DEFUN([CF_CURSES_WACS_MAP],
1207 [
1208 AC_CACHE_CHECK(for wide alternate character set array, cf_cv_curses_wacs_map,[
1209         cf_cv_curses_wacs_map=unknown
1210         for name in wacs_map _wacs_map __wacs_map _nc_wacs _wacs_char
1211         do
1212         AC_TRY_LINK([
1213 #ifndef _XOPEN_SOURCE_EXTENDED
1214 #define _XOPEN_SOURCE_EXTENDED
1215 #endif
1216 #include <${cf_cv_ncurses_header:-curses.h}>],
1217         [void *foo = &(${name}['k']); (void)foo],
1218         [cf_cv_curses_wacs_map=$name
1219          break])
1220         done])
1221
1222 test "$cf_cv_curses_wacs_map" != unknown && AC_DEFINE_UNQUOTED(CURSES_WACS_ARRAY,$cf_cv_curses_wacs_map,[Define to name of (n)curses wide-character array])
1223 ])dnl
1224 dnl ---------------------------------------------------------------------------
1225 dnl CF_CURSES_WACS_SYMBOLS version: 4 updated: 2021/01/04 19:45:09
1226 dnl ----------------------
1227 dnl Do a check to see if the WACS_xxx constants are defined compatibly with
1228 dnl X/Open Curses.  In particular, NetBSD's implementation of the WACS_xxx
1229 dnl constants is broken since those constants do not point to cchar_t's.
1230 AC_DEFUN([CF_CURSES_WACS_SYMBOLS],
1231 [
1232 AC_REQUIRE([CF_CURSES_WACS_MAP])
1233
1234 AC_CACHE_CHECK(for wide alternate character constants, cf_cv_curses_wacs_symbols,[
1235 cf_cv_curses_wacs_symbols=no
1236 if test "$cf_cv_curses_wacs_map" != unknown
1237 then
1238         AC_TRY_LINK([
1239 #ifndef _XOPEN_SOURCE_EXTENDED
1240 #define _XOPEN_SOURCE_EXTENDED
1241 #endif
1242 #include <${cf_cv_ncurses_header:-curses.h}>],
1243         [cchar_t *foo = WACS_PLUS;
1244          ${cf_cv_curses_wacs_map}['k'] = *WACS_PLUS; (void)foo],
1245         [cf_cv_curses_wacs_symbols=yes])
1246 else
1247         AC_TRY_LINK([
1248 #ifndef _XOPEN_SOURCE_EXTENDED
1249 #define _XOPEN_SOURCE_EXTENDED
1250 #endif
1251 #include <${cf_cv_ncurses_header:-curses.h}>],
1252         [cchar_t *foo = WACS_PLUS; (void)foo],
1253         [cf_cv_curses_wacs_symbols=yes])
1254 fi
1255 ])
1256
1257 test "$cf_cv_curses_wacs_symbols" != no && AC_DEFINE(CURSES_WACS_SYMBOLS,1,[Define to 1 if (n)curses supports wide-character WACS_ symbols])
1258 ])dnl
1259 dnl ---------------------------------------------------------------------------
1260 dnl CF_DIRNAME version: 5 updated: 2020/12/31 20:19:42
1261 dnl ----------
1262 dnl "dirname" is not portable, so we fake it with a shell script.
1263 AC_DEFUN([CF_DIRNAME],[$1=`echo "$2" | sed -e 's%/[[^/]]*$%%'`])dnl
1264 dnl ---------------------------------------------------------------------------
1265 dnl CF_DISABLE_ECHO version: 13 updated: 2015/04/18 08:56:57
1266 dnl ---------------
1267 dnl You can always use "make -n" to see the actual options, but it's hard to
1268 dnl pick out/analyze warning messages when the compile-line is long.
1269 dnl
1270 dnl Sets:
1271 dnl     ECHO_LT - symbol to control if libtool is verbose
1272 dnl     ECHO_LD - symbol to prefix "cc -o" lines
1273 dnl     RULE_CC - symbol to put before implicit "cc -c" lines (e.g., .c.o)
1274 dnl     SHOW_CC - symbol to put before explicit "cc -c" lines
1275 dnl     ECHO_CC - symbol to put before any "cc" line
1276 dnl
1277 AC_DEFUN([CF_DISABLE_ECHO],[
1278 AC_MSG_CHECKING(if you want to see long compiling messages)
1279 CF_ARG_DISABLE(echo,
1280         [  --disable-echo          do not display "compiling" commands],
1281         [
1282         ECHO_LT='--silent'
1283         ECHO_LD='@echo linking [$]@;'
1284         RULE_CC='@echo compiling [$]<'
1285         SHOW_CC='@echo compiling [$]@'
1286         ECHO_CC='@'
1287 ],[
1288         ECHO_LT=''
1289         ECHO_LD=''
1290         RULE_CC=''
1291         SHOW_CC=''
1292         ECHO_CC=''
1293 ])
1294 AC_MSG_RESULT($enableval)
1295 AC_SUBST(ECHO_LT)
1296 AC_SUBST(ECHO_LD)
1297 AC_SUBST(RULE_CC)
1298 AC_SUBST(SHOW_CC)
1299 AC_SUBST(ECHO_CC)
1300 ])dnl
1301 dnl ---------------------------------------------------------------------------
1302 dnl CF_DISABLE_LEAKS version: 9 updated: 2021/04/03 16:41:50
1303 dnl ----------------
1304 dnl Combine no-leak checks with the libraries or tools that are used for the
1305 dnl checks.
1306 AC_DEFUN([CF_DISABLE_LEAKS],[
1307
1308 AC_REQUIRE([CF_WITH_DMALLOC])
1309 AC_REQUIRE([CF_WITH_DBMALLOC])
1310 AC_REQUIRE([CF_WITH_VALGRIND])
1311
1312 AC_MSG_CHECKING(if you want to perform memory-leak testing)
1313 AC_ARG_ENABLE(leaks,
1314         [  --disable-leaks         test: free permanent memory, analyze leaks],
1315         [enable_leaks=$enableval],
1316         [enable_leaks=yes])
1317 dnl with_no_leaks is more readable...
1318 if test "x$enable_leaks" = xno; then with_no_leaks=yes; else with_no_leaks=no; fi
1319 AC_MSG_RESULT($with_no_leaks)
1320
1321 if test "$enable_leaks" = no ; then
1322         AC_DEFINE(NO_LEAKS,1,[Define to 1 if you want to perform memory-leak testing.])
1323         AC_DEFINE(YY_NO_LEAKS,1,[Define to 1 if you want to perform memory-leak testing.])
1324 fi
1325 ])dnl
1326 dnl ---------------------------------------------------------------------------
1327 dnl CF_DISABLE_RPATH_HACK version: 3 updated: 2021/01/05 20:14:44
1328 dnl ---------------------
1329 dnl The rpath-hack makes it simpler to build programs, particularly with the
1330 dnl *BSD ports which may have essential libraries in unusual places.  But it
1331 dnl can interfere with building an executable for the base system.  Use this
1332 dnl option in that case.
1333 AC_DEFUN([CF_DISABLE_RPATH_HACK],
1334 [
1335 AC_MSG_CHECKING(if rpath-hack should be disabled)
1336 CF_ARG_DISABLE(rpath-hack,
1337         [  --disable-rpath-hack    don't add rpath options for additional libraries],
1338         [enable_rpath_hack=no],
1339         [enable_rpath_hack=yes])
1340 dnl TODO - drop cf_disable_rpath_hack
1341 if test "x$enable_rpath_hack" = xno; then cf_disable_rpath_hack=yes; else cf_disable_rpath_hack=no; fi
1342 AC_MSG_RESULT($cf_disable_rpath_hack)
1343
1344 if test "$enable_rpath_hack" = yes ; then
1345         CF_RPATH_HACK
1346 fi
1347 ])
1348 dnl ---------------------------------------------------------------------------
1349 dnl CF_ENABLE_STRING_HACKS version: 6 updated: 2021/01/05 19:23:48
1350 dnl ----------------------
1351 dnl On a few platforms, the compiler and/or loader nags with untruthful
1352 dnl comments stating that "most" uses of strcat/strcpy/sprintf are incorrect,
1353 dnl and implying that most uses of the recommended alternatives are correct.
1354 dnl
1355 dnl Factually speaking, no one has actually counted the number of uses of these
1356 dnl functions versus the total of incorrect uses.  Samples of a few thousand
1357 dnl instances are meaningless compared to the hundreds of millions of lines of
1358 dnl existing C code.
1359 dnl
1360 dnl strlcat/strlcpy are (as of 2012) non-standard, and are available on some
1361 dnl platforms, in implementations of varying quality.  Likewise, snprintf is
1362 dnl standard - but evolved through phases, and older implementations are likely
1363 dnl to yield surprising results, as documented in manpages on various systems.
1364 AC_DEFUN([CF_ENABLE_STRING_HACKS],
1365 [
1366 AC_MSG_CHECKING(if you want to work around bogus compiler/loader warnings)
1367 AC_ARG_ENABLE(string-hacks,
1368         [  --enable-string-hacks   work around bogus compiler/loader warnings],
1369         [enable_string_hacks=$enableval],
1370         [enable_string_hacks=no])
1371 AC_MSG_RESULT($enable_string_hacks)
1372
1373 if test "x$enable_string_hacks" = "xyes"; then
1374         AC_DEFINE(USE_STRING_HACKS,1,[Define to 1 to work around bogus compiler/loader warnings])
1375         AC_MSG_WARN(enabling string-hacks to work around bogus compiler/loader warnings)
1376         AC_CHECK_FUNC(strlcat,[
1377                 AC_DEFINE(HAVE_STRLCAT,1,[Define to 1 if we have strlcat function])
1378                 ],[
1379                 AC_CHECK_LIB(bsd,strlcat,[
1380                         CF_ADD_LIB(bsd)
1381                         AC_CHECK_HEADERS(bsd/string.h)
1382                         AC_DEFINE(HAVE_STRLCAT,1,[Define to 1 if we have strlcat function])
1383                         ])
1384                 ])
1385         AC_CHECK_FUNCS( strlcpy snprintf )
1386 fi
1387 ])dnl
1388 dnl ---------------------------------------------------------------------------
1389 dnl CF_ENABLE_WARNINGS version: 9 updated: 2021/01/05 19:40:50
1390 dnl ------------------
1391 dnl Configure-option to enable gcc warnings
1392 dnl
1393 dnl $1 = extra options to add, if supported
1394 dnl $2 = option for checking attributes.  By default, this is done when
1395 dnl      warnings are enabled.  For other values:
1396 dnl      yes: always do this, e.g., to use in generated library-headers
1397 dnl      no: never do this
1398 AC_DEFUN([CF_ENABLE_WARNINGS],[
1399 if test "$GCC" = yes || test "$GXX" = yes
1400 then
1401 CF_FIX_WARNINGS(CFLAGS)
1402 CF_FIX_WARNINGS(CPPFLAGS)
1403 CF_FIX_WARNINGS(LDFLAGS)
1404 AC_MSG_CHECKING(if you want to turn on gcc warnings)
1405 CF_ARG_ENABLE(warnings,
1406         [  --enable-warnings       test: turn on gcc compiler warnings],
1407         [enable_warnings=yes],
1408         [enable_warnings=no])
1409 AC_MSG_RESULT($enable_warnings)
1410 if test "$enable_warnings" = "yes"
1411 then
1412         ifelse($2,,[CF_GCC_ATTRIBUTES])
1413         CF_GCC_WARNINGS($1)
1414 fi
1415 ifelse($2,yes,[CF_GCC_ATTRIBUTES])
1416 fi
1417 ])dnl
1418 dnl ---------------------------------------------------------------------------
1419 dnl CF_FIND_LIBRARY version: 11 updated: 2021/01/02 09:31:20
1420 dnl ---------------
1421 dnl Look for a non-standard library, given parameters for AC_TRY_LINK.  We
1422 dnl prefer a standard location, and use -L options only if we do not find the
1423 dnl library in the standard library location(s).
1424 dnl     $1 = library name
1425 dnl     $2 = library class, usually the same as library name
1426 dnl     $3 = includes
1427 dnl     $4 = code fragment to compile/link
1428 dnl     $5 = corresponding function-name
1429 dnl     $6 = flag, nonnull if failure should not cause an error-exit
1430 dnl
1431 dnl Sets the variable "$cf_libdir" as a side-effect, so we can see if we had
1432 dnl to use a -L option.
1433 AC_DEFUN([CF_FIND_LIBRARY],
1434 [
1435         eval 'cf_cv_have_lib_'"$1"'=no'
1436         cf_libdir=""
1437         AC_CHECK_FUNC($5,
1438                 eval 'cf_cv_have_lib_'"$1"'=yes',[
1439                 cf_save_LIBS="$LIBS"
1440                 AC_MSG_CHECKING(for $5 in -l$1)
1441                 LIBS="-l$1 $LIBS"
1442                 AC_TRY_LINK([$3],[$4],
1443                         [AC_MSG_RESULT(yes)
1444                          eval 'cf_cv_have_lib_'"$1"'=yes'
1445                         ],
1446                         [AC_MSG_RESULT(no)
1447                         CF_LIBRARY_PATH(cf_search,$2)
1448                         for cf_libdir in $cf_search
1449                         do
1450                                 AC_MSG_CHECKING(for -l$1 in $cf_libdir)
1451                                 LIBS="-L$cf_libdir -l$1 $cf_save_LIBS"
1452                                 AC_TRY_LINK([$3],[$4],
1453                                         [AC_MSG_RESULT(yes)
1454                                          eval 'cf_cv_have_lib_'"$1"'=yes'
1455                                          break],
1456                                         [AC_MSG_RESULT(no)
1457                                          LIBS="$cf_save_LIBS"])
1458                         done
1459                         ])
1460                 ])
1461 eval 'cf_found_library="[$]cf_cv_have_lib_'"$1"\"
1462 ifelse($6,,[
1463 if test "$cf_found_library" = no ; then
1464         AC_MSG_ERROR(Cannot link $1 library)
1465 fi
1466 ])
1467 ])dnl
1468 dnl ---------------------------------------------------------------------------
1469 dnl CF_FIND_LINKAGE version: 22 updated: 2020/12/31 20:19:42
1470 dnl ---------------
1471 dnl Find a library (specifically the linkage used in the code fragment),
1472 dnl searching for it if it is not already in the library path.
1473 dnl See also CF_ADD_SEARCHPATH.
1474 dnl
1475 dnl Parameters (4-on are optional):
1476 dnl     $1 = headers for library entrypoint
1477 dnl     $2 = code fragment for library entrypoint
1478 dnl     $3 = the library name without the "-l" option or ".so" suffix.
1479 dnl     $4 = action to perform if successful (default: update CPPFLAGS, etc)
1480 dnl     $5 = action to perform if not successful
1481 dnl     $6 = module name, if not the same as the library name
1482 dnl     $7 = extra libraries
1483 dnl
1484 dnl Sets these variables:
1485 dnl     $cf_cv_find_linkage_$3 - yes/no according to whether linkage is found
1486 dnl     $cf_cv_header_path_$3 - include-directory if needed
1487 dnl     $cf_cv_library_path_$3 - library-directory if needed
1488 dnl     $cf_cv_library_file_$3 - library-file if needed, e.g., -l$3
1489 AC_DEFUN([CF_FIND_LINKAGE],[
1490
1491 # If the linkage is not already in the $CPPFLAGS/$LDFLAGS configuration, these
1492 # will be set on completion of the AC_TRY_LINK below.
1493 cf_cv_header_path_$3=
1494 cf_cv_library_path_$3=
1495
1496 CF_MSG_LOG([Starting [FIND_LINKAGE]($3,$6)])
1497
1498 cf_save_LIBS="$LIBS"
1499
1500 AC_TRY_LINK([$1],[$2],[
1501         cf_cv_find_linkage_$3=yes
1502         cf_cv_header_path_$3=/usr/include
1503         cf_cv_library_path_$3=/usr/lib
1504 ],[
1505
1506 LIBS="-l$3 $7 $cf_save_LIBS"
1507
1508 AC_TRY_LINK([$1],[$2],[
1509         cf_cv_find_linkage_$3=yes
1510         cf_cv_header_path_$3=/usr/include
1511         cf_cv_library_path_$3=/usr/lib
1512         cf_cv_library_file_$3="-l$3"
1513 ],[
1514         cf_cv_find_linkage_$3=no
1515         LIBS="$cf_save_LIBS"
1516
1517         CF_VERBOSE(find linkage for $3 library)
1518         CF_MSG_LOG([Searching for headers in [FIND_LINKAGE]($3,$6)])
1519
1520         cf_save_CPPFLAGS="$CPPFLAGS"
1521         cf_test_CPPFLAGS="$CPPFLAGS"
1522
1523         CF_HEADER_PATH(cf_search,ifelse([$6],,[$3],[$6]))
1524         for cf_cv_header_path_$3 in $cf_search
1525         do
1526                 if test -d "$cf_cv_header_path_$3" ; then
1527                         CF_VERBOSE(... testing $cf_cv_header_path_$3)
1528                         CPPFLAGS="$cf_save_CPPFLAGS"
1529                         CF_APPEND_TEXT(CPPFLAGS,-I$cf_cv_header_path_$3)
1530                         AC_TRY_COMPILE([$1],[$2],[
1531                                 CF_VERBOSE(... found $3 headers in $cf_cv_header_path_$3)
1532                                 cf_cv_find_linkage_$3=maybe
1533                                 cf_test_CPPFLAGS="$CPPFLAGS"
1534                                 break],[
1535                                 CPPFLAGS="$cf_save_CPPFLAGS"
1536                                 ])
1537                 fi
1538         done
1539
1540         if test "$cf_cv_find_linkage_$3" = maybe ; then
1541
1542                 CF_MSG_LOG([Searching for $3 library in [FIND_LINKAGE]($3,$6)])
1543
1544                 cf_save_LIBS="$LIBS"
1545                 cf_save_LDFLAGS="$LDFLAGS"
1546
1547                 ifelse([$6],,,[
1548                 CPPFLAGS="$cf_test_CPPFLAGS"
1549                 LIBS="-l$3 $7 $cf_save_LIBS"
1550                 AC_TRY_LINK([$1],[$2],[
1551                         CF_VERBOSE(... found $3 library in system)
1552                         cf_cv_find_linkage_$3=yes])
1553                         CPPFLAGS="$cf_save_CPPFLAGS"
1554                         LIBS="$cf_save_LIBS"
1555                         ])
1556
1557                 if test "$cf_cv_find_linkage_$3" != yes ; then
1558                         CF_LIBRARY_PATH(cf_search,$3)
1559                         for cf_cv_library_path_$3 in $cf_search
1560                         do
1561                                 if test -d "$cf_cv_library_path_$3" ; then
1562                                         CF_VERBOSE(... testing $cf_cv_library_path_$3)
1563                                         CPPFLAGS="$cf_test_CPPFLAGS"
1564                                         LIBS="-l$3 $7 $cf_save_LIBS"
1565                                         LDFLAGS="$cf_save_LDFLAGS -L$cf_cv_library_path_$3"
1566                                         AC_TRY_LINK([$1],[$2],[
1567                                         CF_VERBOSE(... found $3 library in $cf_cv_library_path_$3)
1568                                         cf_cv_find_linkage_$3=yes
1569                                         cf_cv_library_file_$3="-l$3"
1570                                         break],[
1571                                         CPPFLAGS="$cf_save_CPPFLAGS"
1572                                         LIBS="$cf_save_LIBS"
1573                                         LDFLAGS="$cf_save_LDFLAGS"
1574                                         ])
1575                                 fi
1576                         done
1577                         CPPFLAGS="$cf_save_CPPFLAGS"
1578                         LDFLAGS="$cf_save_LDFLAGS"
1579                 fi
1580
1581         else
1582                 cf_cv_find_linkage_$3=no
1583         fi
1584         ],$7)
1585 ])
1586
1587 LIBS="$cf_save_LIBS"
1588
1589 if test "$cf_cv_find_linkage_$3" = yes ; then
1590 ifelse([$4],,[
1591         CF_ADD_INCDIR($cf_cv_header_path_$3)
1592         CF_ADD_LIBDIR($cf_cv_library_path_$3)
1593         CF_ADD_LIB($3)
1594 ],[$4])
1595 else
1596 ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
1597 fi
1598 ])dnl
1599 dnl ---------------------------------------------------------------------------
1600 dnl CF_FIX_WARNINGS version: 3 updated: 2020/12/31 18:40:20
1601 dnl ---------------
1602 dnl Warning flags do not belong in CFLAGS, CPPFLAGS, etc.  Any of gcc's
1603 dnl "-Werror" flags can interfere with configure-checks.  Those go into
1604 dnl EXTRA_CFLAGS.
1605 dnl
1606 dnl $1 = variable name to repair
1607 define([CF_FIX_WARNINGS],[
1608 if test "$GCC" = yes || test "$GXX" = yes
1609 then
1610         case [$]$1 in
1611         (*-Werror=*)
1612                 CF_VERBOSE(repairing $1: [$]$1)
1613                 cf_temp_flags=
1614                 for cf_temp_scan in [$]$1
1615                 do
1616                         case "x$cf_temp_scan" in
1617                         (x-Werror=*)
1618                                 CF_APPEND_TEXT(EXTRA_CFLAGS,$cf_temp_scan)
1619                                 ;;
1620                         (*)
1621                                 CF_APPEND_TEXT(cf_temp_flags,$cf_temp_scan)
1622                                 ;;
1623                         esac
1624                 done
1625                 $1="$cf_temp_flags"
1626                 CF_VERBOSE(... fixed [$]$1)
1627                 CF_VERBOSE(... extra $EXTRA_CFLAGS)
1628                 ;;
1629         esac
1630 fi
1631 AC_SUBST(EXTRA_CFLAGS)
1632 ])dnl
1633 dnl ---------------------------------------------------------------------------
1634 dnl CF_FUNC_CURSES_VERSION version: 8 updated: 2021/01/02 09:31:20
1635 dnl ----------------------
1636 dnl Solaris has a data item 'curses_version', which confuses AC_CHECK_FUNCS.
1637 dnl It's a character string "SVR4", not documented.
1638 AC_DEFUN([CF_FUNC_CURSES_VERSION],
1639 [
1640 AC_CACHE_CHECK(for function curses_version, cf_cv_func_curses_version,[
1641 AC_TRY_RUN([
1642 #include <${cf_cv_ncurses_header:-curses.h}>
1643 int main(void)
1644 {
1645         char temp[1024];
1646         sprintf(temp, "%s\\n", curses_version());
1647         ${cf_cv_main_return:-return}(0);
1648 }]
1649 ,[cf_cv_func_curses_version=yes]
1650 ,[cf_cv_func_curses_version=no]
1651 ,[cf_cv_func_curses_version=unknown])
1652 rm -f core])
1653 test "$cf_cv_func_curses_version" = yes && AC_DEFINE(HAVE_CURSES_VERSION,1,[Define to 1 if we have curses_version function])
1654 ])
1655 dnl ---------------------------------------------------------------------------
1656 dnl CF_FUNC_OPENPTY version: 6 updated: 2021/01/01 13:31:04
1657 dnl ---------------
1658 dnl Check for openpty() function, along with <pty.h> header.  It may need the
1659 dnl "util" library as well.
1660 AC_DEFUN([CF_FUNC_OPENPTY],
1661 [
1662 AC_CHECK_LIB(util,openpty,cf_cv_lib_util=yes,cf_cv_lib_util=no)
1663 AC_CACHE_CHECK(for openpty header,cf_cv_func_openpty,[
1664         cf_save_LIBS="$LIBS"
1665         test "$cf_cv_lib_util" = yes && { CF_ADD_LIB(util) }
1666         for cf_header in pty.h libutil.h util.h
1667         do
1668         AC_TRY_LINK([
1669 #include <$cf_header>
1670 ],[
1671         int x = openpty((int *)0, (int *)0, (char *)0,
1672                                    (struct termios *)0, (struct winsize *)0);
1673 ],[
1674                 cf_cv_func_openpty=$cf_header
1675                 break
1676 ],[
1677                 cf_cv_func_openpty=no
1678 ])
1679         done
1680         LIBS="$cf_save_LIBS"
1681 ])
1682 ])dnl
1683 dnl ---------------------------------------------------------------------------
1684 dnl CF_GCC_ATTRIBUTES version: 24 updated: 2021/03/20 12:00:25
1685 dnl -----------------
1686 dnl Test for availability of useful gcc __attribute__ directives to quiet
1687 dnl compiler warnings.  Though useful, not all are supported -- and contrary
1688 dnl to documentation, unrecognized directives cause older compilers to barf.
1689 AC_DEFUN([CF_GCC_ATTRIBUTES],
1690 [AC_REQUIRE([AC_PROG_FGREP])dnl
1691 AC_REQUIRE([CF_C11_NORETURN])dnl
1692
1693 if test "$GCC" = yes || test "$GXX" = yes
1694 then
1695 cat > conftest.i <<EOF
1696 #ifndef GCC_PRINTF
1697 #define GCC_PRINTF 0
1698 #endif
1699 #ifndef GCC_SCANF
1700 #define GCC_SCANF 0
1701 #endif
1702 #ifndef GCC_NORETURN
1703 #define GCC_NORETURN /* nothing */
1704 #endif
1705 #ifndef GCC_UNUSED
1706 #define GCC_UNUSED /* nothing */
1707 #endif
1708 EOF
1709 if test "$GCC" = yes
1710 then
1711         AC_CHECKING([for $CC __attribute__ directives])
1712 cat > "conftest.$ac_ext" <<EOF
1713 #line __oline__ "${as_me:-configure}"
1714 #include "confdefs.h"
1715 #include "conftest.h"
1716 #include "conftest.i"
1717 #if     GCC_PRINTF
1718 #define GCC_PRINTFLIKE(fmt,var) __attribute__((format(printf,fmt,var)))
1719 #else
1720 #define GCC_PRINTFLIKE(fmt,var) /*nothing*/
1721 #endif
1722 #if     GCC_SCANF
1723 #define GCC_SCANFLIKE(fmt,var)  __attribute__((format(scanf,fmt,var)))
1724 #else
1725 #define GCC_SCANFLIKE(fmt,var)  /*nothing*/
1726 #endif
1727 extern void wow(char *,...) GCC_SCANFLIKE(1,2);
1728 extern GCC_NORETURN void oops(char *,...) GCC_PRINTFLIKE(1,2);
1729 extern GCC_NORETURN void foo(void);
1730 int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
1731 EOF
1732         cf_printf_attribute=no
1733         cf_scanf_attribute=no
1734         for cf_attribute in scanf printf unused noreturn
1735         do
1736                 CF_UPPER(cf_ATTRIBUTE,$cf_attribute)
1737                 cf_directive="__attribute__(($cf_attribute))"
1738                 echo "checking for $CC $cf_directive" 1>&AC_FD_CC
1739
1740                 case "$cf_attribute" in
1741                 (printf)
1742                         cf_printf_attribute=yes
1743                         cat >conftest.h <<EOF
1744 #define GCC_$cf_ATTRIBUTE 1
1745 EOF
1746                         ;;
1747                 (scanf)
1748                         cf_scanf_attribute=yes
1749                         cat >conftest.h <<EOF
1750 #define GCC_$cf_ATTRIBUTE 1
1751 EOF
1752                         ;;
1753                 (*)
1754                         cat >conftest.h <<EOF
1755 #define GCC_$cf_ATTRIBUTE $cf_directive
1756 EOF
1757                         ;;
1758                 esac
1759
1760                 if AC_TRY_EVAL(ac_compile); then
1761                         test -n "$verbose" && AC_MSG_RESULT(... $cf_attribute)
1762                         cat conftest.h >>confdefs.h
1763                         case "$cf_attribute" in
1764                         (noreturn)
1765                                 AC_DEFINE_UNQUOTED(GCC_NORETURN,$cf_directive,[Define to noreturn-attribute for gcc])
1766                                 ;;
1767                         (printf)
1768                                 cf_value='/* nothing */'
1769                                 if test "$cf_printf_attribute" != no ; then
1770                                         cf_value='__attribute__((format(printf,fmt,var)))'
1771                                         AC_DEFINE(GCC_PRINTF,1,[Define to 1 if the compiler supports gcc-like printf attribute.])
1772                                 fi
1773                                 AC_DEFINE_UNQUOTED(GCC_PRINTFLIKE(fmt,var),$cf_value,[Define to printf-attribute for gcc])
1774                                 ;;
1775                         (scanf)
1776                                 cf_value='/* nothing */'
1777                                 if test "$cf_scanf_attribute" != no ; then
1778                                         cf_value='__attribute__((format(scanf,fmt,var)))'
1779                                         AC_DEFINE(GCC_SCANF,1,[Define to 1 if the compiler supports gcc-like scanf attribute.])
1780                                 fi
1781                                 AC_DEFINE_UNQUOTED(GCC_SCANFLIKE(fmt,var),$cf_value,[Define to sscanf-attribute for gcc])
1782                                 ;;
1783                         (unused)
1784                                 AC_DEFINE_UNQUOTED(GCC_UNUSED,$cf_directive,[Define to unused-attribute for gcc])
1785                                 ;;
1786                         esac
1787                 fi
1788         done
1789 else
1790         ${FGREP-fgrep} define conftest.i >>confdefs.h
1791 fi
1792 rm -rf ./conftest*
1793 fi
1794 ])dnl
1795 dnl ---------------------------------------------------------------------------
1796 dnl CF_GCC_VERSION version: 8 updated: 2019/09/07 13:38:36
1797 dnl --------------
1798 dnl Find version of gcc, and (because icc/clang pretend to be gcc without being
1799 dnl compatible), attempt to determine if icc/clang is actually used.
1800 AC_DEFUN([CF_GCC_VERSION],[
1801 AC_REQUIRE([AC_PROG_CC])
1802 GCC_VERSION=none
1803 if test "$GCC" = yes ; then
1804         AC_MSG_CHECKING(version of $CC)
1805         GCC_VERSION="`${CC} --version 2>/dev/null | sed -e '2,$d' -e 's/^.*(GCC[[^)]]*) //' -e 's/^.*(Debian[[^)]]*) //' -e 's/^[[^0-9.]]*//' -e 's/[[^0-9.]].*//'`"
1806         test -z "$GCC_VERSION" && GCC_VERSION=unknown
1807         AC_MSG_RESULT($GCC_VERSION)
1808 fi
1809 CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)
1810 CF_CLANG_COMPILER(GCC,CLANG_COMPILER,CFLAGS)
1811 ])dnl
1812 dnl ---------------------------------------------------------------------------
1813 dnl CF_GCC_WARNINGS version: 41 updated: 2021/01/01 16:53:59
1814 dnl ---------------
1815 dnl Check if the compiler supports useful warning options.  There's a few that
1816 dnl we don't use, simply because they're too noisy:
1817 dnl
1818 dnl     -Wconversion (useful in older versions of gcc, but not in gcc 2.7.x)
1819 dnl     -Winline (usually not worthwhile)
1820 dnl     -Wredundant-decls (system headers make this too noisy)
1821 dnl     -Wtraditional (combines too many unrelated messages, only a few useful)
1822 dnl     -Wwrite-strings (too noisy, but should review occasionally).  This
1823 dnl             is enabled for ncurses using "--enable-const".
1824 dnl     -pedantic
1825 dnl
1826 dnl Parameter:
1827 dnl     $1 is an optional list of gcc warning flags that a particular
1828 dnl             application might want to use, e.g., "no-unused" for
1829 dnl             -Wno-unused
1830 dnl Special:
1831 dnl     If $with_ext_const is "yes", add a check for -Wwrite-strings
1832 dnl
1833 AC_DEFUN([CF_GCC_WARNINGS],
1834 [
1835 AC_REQUIRE([CF_GCC_VERSION])
1836 if test "x$have_x" = xyes; then CF_CONST_X_STRING fi
1837 cat > "conftest.$ac_ext" <<EOF
1838 #line __oline__ "${as_me:-configure}"
1839 int main(int argc, char *argv[[]]) { return (argv[[argc-1]] == 0) ; }
1840 EOF
1841 if test "$INTEL_COMPILER" = yes
1842 then
1843 # The "-wdXXX" options suppress warnings:
1844 # remark #1419: external declaration in primary source file
1845 # remark #1683: explicit conversion of a 64-bit integral type to a smaller integral type (potential portability problem)
1846 # remark #1684: conversion from pointer to same-sized integral type (potential portability problem)
1847 # remark #193: zero used for undefined preprocessing identifier
1848 # remark #593: variable "curs_sb_left_arrow" was set but never used
1849 # remark #810: conversion from "int" to "Dimension={unsigned short}" may lose significant bits
1850 # remark #869: parameter "tw" was never referenced
1851 # remark #981: operands are evaluated in unspecified order
1852 # warning #279: controlling expression is constant
1853
1854         AC_CHECKING([for $CC warning options])
1855         cf_save_CFLAGS="$CFLAGS"
1856         EXTRA_CFLAGS="$EXTRA_CFLAGS -Wall"
1857         for cf_opt in \
1858                 wd1419 \
1859                 wd1683 \
1860                 wd1684 \
1861                 wd193 \
1862                 wd593 \
1863                 wd279 \
1864                 wd810 \
1865                 wd869 \
1866                 wd981
1867         do
1868                 CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
1869                 if AC_TRY_EVAL(ac_compile); then
1870                         test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
1871                         EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
1872                 fi
1873         done
1874         CFLAGS="$cf_save_CFLAGS"
1875 elif test "$GCC" = yes && test "$GCC_VERSION" != "unknown"
1876 then
1877         AC_CHECKING([for $CC warning options])
1878         cf_save_CFLAGS="$CFLAGS"
1879         cf_warn_CONST=""
1880         test "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
1881         cf_gcc_warnings="Wignored-qualifiers Wlogical-op Wvarargs"
1882         test "x$CLANG_COMPILER" = xyes && cf_gcc_warnings=
1883         for cf_opt in W Wall \
1884                 Wbad-function-cast \
1885                 Wcast-align \
1886                 Wcast-qual \
1887                 Wdeclaration-after-statement \
1888                 Wextra \
1889                 Winline \
1890                 Wmissing-declarations \
1891                 Wmissing-prototypes \
1892                 Wnested-externs \
1893                 Wpointer-arith \
1894                 Wshadow \
1895                 Wstrict-prototypes \
1896                 Wundef Wno-inline $cf_gcc_warnings $cf_warn_CONST $1
1897         do
1898                 CFLAGS="$cf_save_CFLAGS $EXTRA_CFLAGS -$cf_opt"
1899                 if AC_TRY_EVAL(ac_compile); then
1900                         test -n "$verbose" && AC_MSG_RESULT(... -$cf_opt)
1901                         case "$cf_opt" in
1902                         (Winline)
1903                                 case "$GCC_VERSION" in
1904                                 ([[34]].*)
1905                                         CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
1906                                         continue;;
1907                                 esac
1908                                 ;;
1909                         (Wpointer-arith)
1910                                 case "$GCC_VERSION" in
1911                                 ([[12]].*)
1912                                         CF_VERBOSE(feature is broken in gcc $GCC_VERSION)
1913                                         continue;;
1914                                 esac
1915                                 ;;
1916                         esac
1917                         EXTRA_CFLAGS="$EXTRA_CFLAGS -$cf_opt"
1918                 fi
1919         done
1920         CFLAGS="$cf_save_CFLAGS"
1921 fi
1922 rm -rf ./conftest*
1923
1924 AC_SUBST(EXTRA_CFLAGS)
1925 ])dnl
1926 dnl ---------------------------------------------------------------------------
1927 dnl CF_GETOPT_HEADER version: 8 updated: 2021/06/19 19:16:16
1928 dnl ----------------
1929 dnl Check for getopt's variables which are commonly defined in stdlib.h,
1930 dnl unistd.h or (nonstandard) in getopt.h
1931 AC_DEFUN([CF_GETOPT_HEADER],
1932 [
1933 AC_HAVE_HEADERS(unistd.h getopt.h)
1934 AC_CACHE_CHECK(for header declaring getopt variables,cf_cv_getopt_header,[
1935 cf_cv_getopt_header=none
1936 for cf_header in stdio.h stdlib.h unistd.h getopt.h
1937 do
1938 AC_TRY_COMPILE([
1939 #include <$cf_header>],
1940 [int x = optind; char *y = optarg; (void)x; (void)y],
1941 [cf_cv_getopt_header=$cf_header
1942  break])
1943 done
1944 ])
1945 if test "$cf_cv_getopt_header" != none ; then
1946         AC_DEFINE(HAVE_GETOPT_HEADER,1,[Define to 1 if getopt variables are declared in header])
1947 fi
1948 if test "$cf_cv_getopt_header" = getopt.h ; then
1949         AC_DEFINE(NEED_GETOPT_H,1,[Define to 1 if we must include getopt.h])
1950 fi
1951 ])dnl
1952 dnl ---------------------------------------------------------------------------
1953 dnl CF_GNU_SOURCE version: 10 updated: 2018/12/10 20:09:41
1954 dnl -------------
1955 dnl Check if we must define _GNU_SOURCE to get a reasonable value for
1956 dnl _XOPEN_SOURCE, upon which many POSIX definitions depend.  This is a defect
1957 dnl (or misfeature) of glibc2, which breaks portability of many applications,
1958 dnl since it is interwoven with GNU extensions.
1959 dnl
1960 dnl Well, yes we could work around it...
1961 dnl
1962 dnl Parameters:
1963 dnl     $1 is the nominal value for _XOPEN_SOURCE
1964 AC_DEFUN([CF_GNU_SOURCE],
1965 [
1966 cf_gnu_xopen_source=ifelse($1,,500,$1)
1967
1968 AC_CACHE_CHECK(if this is the GNU C library,cf_cv_gnu_library,[
1969 AC_TRY_COMPILE([#include <sys/types.h>],[
1970         #if __GLIBC__ > 0 && __GLIBC_MINOR__ >= 0
1971                 return 0;
1972         #elif __NEWLIB__ > 0 && __NEWLIB_MINOR__ >= 0
1973                 return 0;
1974         #else
1975         #       error not GNU C library
1976         #endif],
1977         [cf_cv_gnu_library=yes],
1978         [cf_cv_gnu_library=no])
1979 ])
1980
1981 if test x$cf_cv_gnu_library = xyes; then
1982
1983         # With glibc 2.19 (13 years after this check was begun), _DEFAULT_SOURCE
1984         # was changed to help a little.  newlib incorporated the change about 4
1985         # years later.
1986         AC_CACHE_CHECK(if _DEFAULT_SOURCE can be used as a basis,cf_cv_gnu_library_219,[
1987                 cf_save="$CPPFLAGS"
1988                 CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
1989                 AC_TRY_COMPILE([#include <sys/types.h>],[
1990                         #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19) || (__GLIBC__ > 2)
1991                                 return 0;
1992                         #elif (__NEWLIB__ == 2 && __NEWLIB_MINOR__ >= 4) || (__GLIBC__ > 3)
1993                                 return 0;
1994                         #else
1995                         #       error GNU C library __GLIBC__.__GLIBC_MINOR__ is too old
1996                         #endif],
1997                         [cf_cv_gnu_library_219=yes],
1998                         [cf_cv_gnu_library_219=no])
1999                 CPPFLAGS="$cf_save"
2000         ])
2001
2002         if test "x$cf_cv_gnu_library_219" = xyes; then
2003                 cf_save="$CPPFLAGS"
2004                 AC_CACHE_CHECK(if _XOPEN_SOURCE=$cf_gnu_xopen_source works with _DEFAULT_SOURCE,cf_cv_gnu_dftsrc_219,[
2005                         CF_ADD_CFLAGS(-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=$cf_gnu_xopen_source)
2006                         AC_TRY_COMPILE([
2007                                 #include <limits.h>
2008                                 #include <sys/types.h>
2009                                 ],[
2010                                 #if (_XOPEN_SOURCE >= $cf_gnu_xopen_source) && (MB_LEN_MAX > 1)
2011                                         return 0;
2012                                 #else
2013                                 #       error GNU C library is too old
2014                                 #endif],
2015                                 [cf_cv_gnu_dftsrc_219=yes],
2016                                 [cf_cv_gnu_dftsrc_219=no])
2017                         ])
2018                 test "x$cf_cv_gnu_dftsrc_219" = "xyes" || CPPFLAGS="$cf_save"
2019         else
2020                 cf_cv_gnu_dftsrc_219=maybe
2021         fi
2022
2023         if test "x$cf_cv_gnu_dftsrc_219" != xyes; then
2024
2025                 AC_CACHE_CHECK(if we must define _GNU_SOURCE,cf_cv_gnu_source,[
2026                 AC_TRY_COMPILE([#include <sys/types.h>],[
2027                         #ifndef _XOPEN_SOURCE
2028                         #error  expected _XOPEN_SOURCE to be defined
2029                         #endif],
2030                         [cf_cv_gnu_source=no],
2031                         [cf_save="$CPPFLAGS"
2032                          CF_ADD_CFLAGS(-D_GNU_SOURCE)
2033                          AC_TRY_COMPILE([#include <sys/types.h>],[
2034                                 #ifdef _XOPEN_SOURCE
2035                                 #error  expected _XOPEN_SOURCE to be undefined
2036                                 #endif],
2037                                 [cf_cv_gnu_source=no],
2038                                 [cf_cv_gnu_source=yes])
2039                         CPPFLAGS="$cf_save"
2040                         ])
2041                 ])
2042
2043                 if test "$cf_cv_gnu_source" = yes
2044                 then
2045                 AC_CACHE_CHECK(if we should also define _DEFAULT_SOURCE,cf_cv_default_source,[
2046                         CF_APPEND_TEXT(CPPFLAGS,-D_GNU_SOURCE)
2047                         AC_TRY_COMPILE([#include <sys/types.h>],[
2048                                 #ifdef _DEFAULT_SOURCE
2049                                 #error  expected _DEFAULT_SOURCE to be undefined
2050                                 #endif],
2051                                 [cf_cv_default_source=no],
2052                                 [cf_cv_default_source=yes])
2053                         ])
2054                         if test "$cf_cv_default_source" = yes
2055                         then
2056                                 CF_APPEND_TEXT(CPPFLAGS,-D_DEFAULT_SOURCE)
2057                         fi
2058                 fi
2059         fi
2060
2061 fi
2062 ])dnl
2063 dnl ---------------------------------------------------------------------------
2064 dnl CF_HEADER_PATH version: 15 updated: 2021/01/01 13:31:04
2065 dnl --------------
2066 dnl Construct a search-list of directories for a nonstandard header-file
2067 dnl
2068 dnl Parameters
2069 dnl     $1 = the variable to return as result
2070 dnl     $2 = the package name
2071 AC_DEFUN([CF_HEADER_PATH],
2072 [
2073 $1=
2074
2075 # collect the current set of include-directories from compiler flags
2076 cf_header_path_list=""
2077 if test -n "${CFLAGS}${CPPFLAGS}" ; then
2078         for cf_header_path in $CPPFLAGS $CFLAGS
2079         do
2080                 case "$cf_header_path" in
2081                 (-I*)
2082                         cf_header_path=`echo ".$cf_header_path" |sed -e 's/^...//' -e 's,/include$,,'`
2083                         CF_ADD_SUBDIR_PATH($1,$2,include,$cf_header_path,NONE)
2084                         cf_header_path_list="$cf_header_path_list [$]$1"
2085                         ;;
2086                 esac
2087         done
2088 fi
2089
2090 # add the variations for the package we are looking for
2091 CF_SUBDIR_PATH($1,$2,include)
2092
2093 test "$includedir" != NONE && \
2094 test "$includedir" != "/usr/include" && \
2095 test -d "$includedir" && {
2096         test -d "$includedir" &&    $1="[$]$1 $includedir"
2097         test -d "$includedir/$2" && $1="[$]$1 $includedir/$2"
2098 }
2099
2100 test "$oldincludedir" != NONE && \
2101 test "$oldincludedir" != "/usr/include" && \
2102 test -d "$oldincludedir" && {
2103         test -d "$oldincludedir"    && $1="[$]$1 $oldincludedir"
2104         test -d "$oldincludedir/$2" && $1="[$]$1 $oldincludedir/$2"
2105 }
2106
2107 $1="[$]$1 $cf_header_path_list"
2108 ])dnl
2109 dnl ---------------------------------------------------------------------------
2110 dnl CF_HELP_MESSAGE version: 4 updated: 2019/12/31 08:53:54
2111 dnl ---------------
2112 dnl Insert text into the help-message, for readability, from AC_ARG_WITH.
2113 AC_DEFUN([CF_HELP_MESSAGE],
2114 [CF_ACVERSION_CHECK(2.53,[],[
2115 AC_DIVERT_HELP($1)])dnl
2116 ])dnl
2117 dnl ---------------------------------------------------------------------------
2118 dnl CF_INHERIT_SCRIPT version: 2 updated: 2003/03/01 23:50:42
2119 dnl -----------------
2120 dnl If we do not have a given script, look for it in the parent directory.
2121 AC_DEFUN([CF_INHERIT_SCRIPT],
2122 [
2123 test -f $1 || ( test -f ../$1 && cp ../$1 ./ )
2124 ])dnl
2125 dnl ---------------------------------------------------------------------------
2126 dnl CF_INSTALL_OPTS version: 2 updated: 2018/08/18 12:19:21
2127 dnl ---------------
2128 dnl prompt for/fill-in useful install-program options
2129 AC_DEFUN([CF_INSTALL_OPTS],
2130 [
2131 CF_INSTALL_OPT_S
2132 CF_INSTALL_OPT_P
2133 CF_INSTALL_OPT_O
2134 ])dnl
2135 dnl ---------------------------------------------------------------------------
2136 dnl CF_INSTALL_OPT_O version: 3 updated: 2020/12/31 20:19:42
2137 dnl ----------------
2138 dnl Almost all "install" programs default to the current user's ownership.
2139 dnl Almost - MINIX is an exception.
2140 AC_DEFUN([CF_INSTALL_OPT_O],
2141 [
2142 AC_MSG_CHECKING(if install needs to be told about ownership)
2143 case `$ac_config_guess` in
2144 (*minix)
2145         with_install_o=yes
2146         ;;
2147 (*)
2148         with_install_o=no
2149         ;;
2150 esac
2151
2152 AC_MSG_RESULT($with_install_o)
2153 if test "x$with_install_o" = xyes
2154 then
2155         INSTALL_OPT_O="`id root|sed -e 's/uid=[[0-9]]*(/ -o /' -e 's/gid=[[0-9]]*(/ -g /' -e 's/ [[^=[:space:]]][[^=[:space:]]]*=.*/ /' -e 's/)//g'`"
2156 else
2157         INSTALL_OPT_O=
2158 fi
2159
2160 AC_SUBST(INSTALL_OPT_O)
2161 ])dnl
2162 dnl ---------------------------------------------------------------------------
2163 dnl CF_INSTALL_OPT_P version: 3 updated: 2021/01/01 13:31:04
2164 dnl ----------------
2165 dnl Some install-programs accept a "-p" option to preserve file modification
2166 dnl timestamps.  That can be useful as an install option, as well as a way to
2167 dnl avoid the need for ranlib after copying a static archive.
2168 AC_DEFUN([CF_INSTALL_OPT_P],
2169 [
2170 : "${INSTALL:=install}"
2171 AC_CACHE_CHECK(if install accepts -p option, cf_cv_install_p,[
2172         rm -rf ./conftest*
2173         date >conftest.in
2174         mkdir conftest.out
2175         sleep 3
2176         if $INSTALL -p conftest.in conftest.out 2>/dev/null
2177         then
2178                 if test -f conftest.out/conftest.in
2179                 then
2180                         test conftest.in -nt conftest.out/conftest.in 2>conftest.err && \
2181                         test conftest.out/conftest.in -nt conftest.in 2>conftest.err
2182                         if test -s conftest.err
2183                         then
2184                                 cf_cv_install_p=no
2185                         else
2186                                 cf_cv_install_p=yes
2187                         fi
2188                 else
2189                         cf_cv_install_p=no
2190                 fi
2191         else
2192                 cf_cv_install_p=no
2193         fi
2194         rm -rf ./conftest*
2195 ])
2196 ])dnl
2197 dnl ---------------------------------------------------------------------------
2198 dnl CF_INSTALL_OPT_S version: 3 updated: 2021/01/05 19:23:48
2199 dnl ----------------
2200 dnl By default, we should strip executables which are installed, but leave the
2201 dnl ability to suppress that for unit-testing.
2202 AC_DEFUN([CF_INSTALL_OPT_S],
2203 [
2204 AC_MSG_CHECKING(if you want to install stripped executables)
2205 CF_ARG_DISABLE(stripping,
2206         [  --disable-stripping     do not strip (debug info) installed executables],
2207         [enable_stripping=no],
2208         [enable_stripping=yes])
2209 AC_MSG_RESULT($enable_stripping)
2210
2211 if test "$enable_stripping" = yes
2212 then
2213         INSTALL_OPT_S="-s"
2214 else
2215         INSTALL_OPT_S=
2216 fi
2217 AC_SUBST(INSTALL_OPT_S)
2218 ])dnl
2219 dnl ---------------------------------------------------------------------------
2220 dnl CF_INTEL_COMPILER version: 8 updated: 2021/01/01 16:53:59
2221 dnl -----------------
2222 dnl Check if the given compiler is really the Intel compiler for Linux.  It
2223 dnl tries to imitate gcc, but does not return an error when it finds a mismatch
2224 dnl between prototypes, e.g., as exercised by CF_MISSING_CHECK.
2225 dnl
2226 dnl This macro should be run "soon" after AC_PROG_CC or AC_PROG_CPLUSPLUS, to
2227 dnl ensure that it is not mistaken for gcc/g++.  It is normally invoked from
2228 dnl the wrappers for gcc and g++ warnings.
2229 dnl
2230 dnl $1 = GCC (default) or GXX
2231 dnl $2 = INTEL_COMPILER (default) or INTEL_CPLUSPLUS
2232 dnl $3 = CFLAGS (default) or CXXFLAGS
2233 AC_DEFUN([CF_INTEL_COMPILER],[
2234 AC_REQUIRE([AC_CANONICAL_HOST])
2235 ifelse([$2],,INTEL_COMPILER,[$2])=no
2236
2237 if test "$ifelse([$1],,[$1],GCC)" = yes ; then
2238         case "$host_os" in
2239         (linux*|gnu*)
2240                 AC_MSG_CHECKING(if this is really Intel ifelse([$1],GXX,C++,C) compiler)
2241                 cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
2242                 ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -no-gcc"
2243                 AC_TRY_COMPILE([],[
2244 #ifdef __INTEL_COMPILER
2245 #else
2246 make an error
2247 #endif
2248 ],[ifelse([$2],,INTEL_COMPILER,[$2])=yes
2249 cf_save_CFLAGS="$cf_save_CFLAGS -we147"
2250 ],[])
2251                 ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
2252                 AC_MSG_RESULT($ifelse([$2],,INTEL_COMPILER,[$2]))
2253                 ;;
2254         esac
2255 fi
2256 ])dnl
2257 dnl ---------------------------------------------------------------------------
2258 dnl CF_LD_RPATH_OPT version: 9 updated: 2021/01/01 13:31:04
2259 dnl ---------------
2260 dnl For the given system and compiler, find the compiler flags to pass to the
2261 dnl loader to use the "rpath" feature.
2262 AC_DEFUN([CF_LD_RPATH_OPT],
2263 [
2264 AC_REQUIRE([CF_CHECK_CACHE])
2265
2266 LD_RPATH_OPT=
2267 if test "x$cf_cv_enable_rpath" != xno
2268 then
2269         AC_MSG_CHECKING(for an rpath option)
2270         case "$cf_cv_system_name" in
2271         (irix*)
2272                 if test "$GCC" = yes; then
2273                         LD_RPATH_OPT="-Wl,-rpath,"
2274                 else
2275                         LD_RPATH_OPT="-rpath "
2276                 fi
2277                 ;;
2278         (linux*|gnu*|k*bsd*-gnu|freebsd*)
2279                 LD_RPATH_OPT="-Wl,-rpath,"
2280                 ;;
2281         (openbsd[[2-9]].*|mirbsd*)
2282                 LD_RPATH_OPT="-Wl,-rpath,"
2283                 ;;
2284         (dragonfly*)
2285                 LD_RPATH_OPT="-rpath "
2286                 ;;
2287         (netbsd*)
2288                 LD_RPATH_OPT="-Wl,-rpath,"
2289                 ;;
2290         (osf*|mls+*)
2291                 LD_RPATH_OPT="-rpath "
2292                 ;;
2293         (solaris2*)
2294                 LD_RPATH_OPT="-R"
2295                 ;;
2296         (*)
2297                 ;;
2298         esac
2299         AC_MSG_RESULT($LD_RPATH_OPT)
2300
2301         case "x$LD_RPATH_OPT" in
2302         (x-R*)
2303                 AC_MSG_CHECKING(if we need a space after rpath option)
2304                 cf_save_LIBS="$LIBS"
2305                 CF_ADD_LIBS(${LD_RPATH_OPT}$libdir)
2306                 AC_TRY_LINK(, , cf_rpath_space=no, cf_rpath_space=yes)
2307                 LIBS="$cf_save_LIBS"
2308                 AC_MSG_RESULT($cf_rpath_space)
2309                 test "$cf_rpath_space" = yes && LD_RPATH_OPT="$LD_RPATH_OPT "
2310                 ;;
2311         esac
2312 fi
2313 ])dnl
2314 dnl ---------------------------------------------------------------------------
2315 dnl CF_LIBRARY_PATH version: 11 updated: 2021/01/01 13:31:04
2316 dnl ---------------
2317 dnl Construct a search-list of directories for a nonstandard library-file
2318 dnl
2319 dnl Parameters
2320 dnl     $1 = the variable to return as result
2321 dnl     $2 = the package name
2322 AC_DEFUN([CF_LIBRARY_PATH],
2323 [
2324 $1=
2325 cf_library_path_list=""
2326 if test -n "${LDFLAGS}${LIBS}" ; then
2327         for cf_library_path in $LDFLAGS $LIBS
2328         do
2329                 case "$cf_library_path" in
2330                 (-L*)
2331                         cf_library_path=`echo ".$cf_library_path" |sed -e 's/^...//' -e 's,/lib$,,'`
2332                         CF_ADD_SUBDIR_PATH($1,$2,lib,$cf_library_path,NONE)
2333                         cf_library_path_list="$cf_library_path_list [$]$1"
2334                         ;;
2335                 esac
2336         done
2337 fi
2338
2339 CF_SUBDIR_PATH($1,$2,lib)
2340
2341 $1="$cf_library_path_list [$]$1"
2342 ])dnl
2343 dnl ---------------------------------------------------------------------------
2344 dnl CF_MAKE_PHONY version: 3 updated: 2021/01/08 16:08:21
2345 dnl -------------
2346 dnl Check if the make-program handles a ".PHONY" target, e.g,. a target which
2347 dnl acts as a placeholder.
2348 dnl
2349 dnl The ".PHONY" feature was proposed in 2011 here
2350 dnl     https://www.austingroupbugs.net/view.php?id=523
2351 dnl and is scheduled for release in P1003.1 Issue 8 (late 2022).
2352 dnl
2353 dnl This is not supported by SVr4 make (or SunOS 4, 4.3SD, etc), but works with
2354 dnl a few others (i.e., GNU make and the non-POSIX "BSD" make):
2355 dnl
2356 dnl + This is a GNU make feature (since April 1988, but in turn from binutils,
2357 dnl   date unspecified).
2358 dnl
2359 dnl + It was adopted in NetBSD make in June 1995.
2360 dnl
2361 dnl + The other BSD make programs are derived from the NetBSD make (and for
2362 dnl   that reason are not actually different "implementations").
2363 dnl
2364 dnl + Some features of NetBSD make were actually adapted from pmake, which
2365 dnl   began as a modified GNU make starting in 1993.
2366 dnl
2367 dnl + Version 3.8 of the dmake program in January 1992 also implemented this
2368 dnl   GNU make extension, but is less well known than the BSD make.
2369 AC_DEFUN([CF_MAKE_PHONY],[
2370 AC_CACHE_CHECK(for \".PHONY\" make-support, cf_cv_make_PHONY,[
2371         rm -rf conftest*
2372         (
2373                 mkdir conftest || exit 1
2374                 cd conftest
2375                 cat >makefile <<'CF_EOF'
2376 .PHONY: always
2377 DATA=0
2378 always: always.out
2379         @echo "** making [$]@ [$](DATA)"
2380 once: once.out
2381         @echo "** making [$]@ [$](DATA)"
2382 always.out:
2383         @echo "** making [$]@ [$](DATA)"
2384         echo [$](DATA) > [$]@
2385 once.out:
2386         @echo "** making [$]@ [$](DATA)"
2387         echo [$](DATA) > [$]@
2388 CF_EOF
2389                 for cf_data in 1 2 3
2390                 do
2391                         ${MAKE:-make} always DATA=$cf_data
2392                         ${MAKE:-make} once   DATA=$cf_data
2393                         ${MAKE:-make} -t always once
2394                         if test -f always ; then
2395                                 echo "no (case 1)" > ../conftest.tmp
2396                         elif test ! -f always.out ; then
2397                                 echo "no (case 2)" > ../conftest.tmp
2398                         elif test ! -f once.out ; then
2399                                 echo "no (case 3)" > ../conftest.tmp
2400                         elif ! cmp -s always.out once.out ; then
2401                                 echo "no (case 4)" > ../conftest.tmp
2402                                 diff always.out once.out
2403                         else
2404                                 cf_check="`cat always.out`"
2405                                 if test "x$cf_check" != "x$cf_data" ; then
2406                                         echo "no (case 5)" > ../conftest.tmp
2407                                 else
2408                                         echo yes > ../conftest.tmp
2409                                         rm -f ./*.out
2410                                         continue
2411                                 fi
2412                         fi
2413                         break
2414                 done
2415         ) >&AC_FD_CC 2>&1
2416         cf_cv_make_PHONY="`cat conftest.tmp`"
2417         rm -rf conftest*
2418 ])
2419 MAKE_NO_PHONY="#"
2420 MAKE_PHONY="#"
2421 test "x$cf_cv_make_PHONY" = xyes && MAKE_PHONY=
2422 test "x$cf_cv_make_PHONY" != xyes && MAKE_NO_PHONY=
2423 AC_SUBST(MAKE_NO_PHONY)
2424 AC_SUBST(MAKE_PHONY)
2425 ])dnl
2426 dnl ---------------------------------------------------------------------------
2427 dnl CF_MAKE_TAGS version: 6 updated: 2010/10/23 15:52:32
2428 dnl ------------
2429 dnl Generate tags/TAGS targets for makefiles.  Do not generate TAGS if we have
2430 dnl a monocase filesystem.
2431 AC_DEFUN([CF_MAKE_TAGS],[
2432 AC_REQUIRE([CF_MIXEDCASE_FILENAMES])
2433
2434 AC_CHECK_PROGS(CTAGS, exctags ctags)
2435 AC_CHECK_PROGS(ETAGS, exetags etags)
2436
2437 AC_CHECK_PROG(MAKE_LOWER_TAGS, ${CTAGS:-ctags}, yes, no)
2438
2439 if test "$cf_cv_mixedcase" = yes ; then
2440         AC_CHECK_PROG(MAKE_UPPER_TAGS, ${ETAGS:-etags}, yes, no)
2441 else
2442         MAKE_UPPER_TAGS=no
2443 fi
2444
2445 if test "$MAKE_UPPER_TAGS" = yes ; then
2446         MAKE_UPPER_TAGS=
2447 else
2448         MAKE_UPPER_TAGS="#"
2449 fi
2450
2451 if test "$MAKE_LOWER_TAGS" = yes ; then
2452         MAKE_LOWER_TAGS=
2453 else
2454         MAKE_LOWER_TAGS="#"
2455 fi
2456
2457 AC_SUBST(CTAGS)
2458 AC_SUBST(ETAGS)
2459
2460 AC_SUBST(MAKE_UPPER_TAGS)
2461 AC_SUBST(MAKE_LOWER_TAGS)
2462 ])dnl
2463 dnl ---------------------------------------------------------------------------
2464 dnl CF_MATH_LIB version: 10 updated: 2020/12/31 18:40:20
2465 dnl -----------
2466 dnl Checks for libraries.  At least one UNIX system, Apple Macintosh
2467 dnl Rhapsody 5.5, does not have -lm.  We cannot use the simpler
2468 dnl AC_CHECK_LIB(m,sin), because that fails for C++.
2469 AC_DEFUN([CF_MATH_LIB],
2470 [
2471 AC_CACHE_CHECK(if -lm needed for math functions,
2472         cf_cv_need_libm,[
2473         AC_TRY_LINK([
2474         #include <stdio.h>
2475         #include <stdlib.h>
2476         #include <math.h>
2477         ],
2478         [double x = rand(); printf("result = %g\\n", ]ifelse([$2],,sin(x),$2)[)],
2479         [cf_cv_need_libm=no],
2480         [cf_cv_need_libm=yes])])
2481 if test "$cf_cv_need_libm" = yes
2482 then
2483 ifelse($1,,[
2484         CF_ADD_LIB(m)
2485 ],[$1=-lm])
2486 fi
2487 ])
2488 dnl ---------------------------------------------------------------------------
2489 dnl CF_MIXEDCASE_FILENAMES version: 9 updated: 2021/01/01 16:53:59
2490 dnl ----------------------
2491 dnl Check if the file-system supports mixed-case filenames.  If we're able to
2492 dnl create a lowercase name and see it as uppercase, it doesn't support that.
2493 AC_DEFUN([CF_MIXEDCASE_FILENAMES],
2494 [
2495 AC_CACHE_CHECK(if filesystem supports mixed-case filenames,cf_cv_mixedcase,[
2496 if test "$cross_compiling" = yes ; then
2497         case "$target_alias" in
2498         (*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*|darwin*)
2499                 cf_cv_mixedcase=no
2500                 ;;
2501         (*)
2502                 cf_cv_mixedcase=yes
2503                 ;;
2504         esac
2505 else
2506         rm -f conftest CONFTEST
2507         echo test >conftest
2508         if test -f CONFTEST ; then
2509                 cf_cv_mixedcase=no
2510         else
2511                 cf_cv_mixedcase=yes
2512         fi
2513         rm -f conftest CONFTEST
2514 fi
2515 ])
2516 test "$cf_cv_mixedcase" = yes && AC_DEFINE(MIXEDCASE_FILENAMES,1,[Define to 1 if filesystem supports mixed-case filenames.])
2517 ])dnl
2518 dnl ---------------------------------------------------------------------------
2519 dnl CF_MSG_LOG version: 5 updated: 2010/10/23 15:52:32
2520 dnl ----------
2521 dnl Write a debug message to config.log, along with the line number in the
2522 dnl configure script.
2523 AC_DEFUN([CF_MSG_LOG],[
2524 echo "${as_me:-configure}:__oline__: testing $* ..." 1>&AC_FD_CC
2525 ])dnl
2526 dnl ---------------------------------------------------------------------------
2527 dnl CF_NCURSES_CC_CHECK version: 5 updated: 2020/12/31 20:19:42
2528 dnl -------------------
2529 dnl Check if we can compile with ncurses' header file
2530 dnl $1 is the cache variable to set
2531 dnl $2 is the header-file to include
2532 dnl $3 is the root name (ncurses or ncursesw)
2533 AC_DEFUN([CF_NCURSES_CC_CHECK],[
2534         AC_TRY_COMPILE([
2535 ]ifelse($3,ncursesw,[
2536 #define _XOPEN_SOURCE_EXTENDED
2537 #undef  HAVE_LIBUTF8_H  /* in case we used CF_UTF8_LIB */
2538 #define HAVE_LIBUTF8_H  /* to force ncurses' header file to use cchar_t */
2539 ])[
2540 #include <$2>],[
2541 #ifdef NCURSES_VERSION
2542 ]ifelse($3,ncursesw,[
2543 #ifndef WACS_BSSB
2544         make an error
2545 #endif
2546 ])[
2547 printf("%s\\n", NCURSES_VERSION);
2548 #else
2549 #ifdef __NCURSES_H
2550 printf("old\\n");
2551 #else
2552         make an error
2553 #endif
2554 #endif
2555         ]
2556         ,[$1=$2]
2557         ,[$1=no])
2558 ])dnl
2559 dnl ---------------------------------------------------------------------------
2560 dnl CF_NCURSES_CONFIG version: 27 updated: 2021/05/19 19:35:25
2561 dnl -----------------
2562 dnl Tie together the configure-script macros for ncurses, preferring these in
2563 dnl order:
2564 dnl a) ".pc" files for pkg-config, using $NCURSES_CONFIG_PKG
2565 dnl b) the "-config" script from ncurses, using $NCURSES_CONFIG
2566 dnl c) just plain libraries
2567 dnl
2568 dnl $1 is the root library name (default: "ncurses")
2569 AC_DEFUN([CF_NCURSES_CONFIG],[
2570 AC_REQUIRE([CF_PKG_CONFIG])
2571 cf_ncuconfig_root=ifelse($1,,ncurses,$1)
2572 cf_have_ncuconfig=no
2573
2574 if test "x${PKG_CONFIG:=none}" != xnone; then
2575         AC_MSG_CHECKING(pkg-config for $cf_ncuconfig_root)
2576         if "$PKG_CONFIG" --exists $cf_ncuconfig_root ; then
2577                 AC_MSG_RESULT(yes)
2578
2579                 AC_MSG_CHECKING(if the $cf_ncuconfig_root package files work)
2580                 cf_have_ncuconfig=unknown
2581
2582                 cf_save_CFLAGS="$CFLAGS"
2583                 cf_save_CPPFLAGS="$CPPFLAGS"
2584                 cf_save_LIBS="$LIBS"
2585
2586                 cf_pkg_cflags="`$PKG_CONFIG --cflags $cf_ncuconfig_root`"
2587                 cf_pkg_libs="`$PKG_CONFIG --libs $cf_ncuconfig_root`"
2588
2589                 # while -W for passing linker flags is prevalent, it is not "standard".
2590                 # At least one wrapper for c89/c99 (in Apple's xcode) has its own
2591                 # incompatible _and_ non-standard -W option which gives an error.  Work
2592                 # around that pitfall.
2593                 case "x${CC}@@${cf_pkg_libs}@${cf_pkg_cflags}" in
2594                 (x*c[[89]]9@@*-W*)
2595                         CF_ADD_CFLAGS($cf_pkg_cflags)
2596                         CF_ADD_LIBS($cf_pkg_libs)
2597
2598                         AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
2599                                 [initscr(); mousemask(0,0); tigetstr((char *)0);],
2600                                 [AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
2601                                         int main(void)
2602                                         { const char *xx = curses_version(); return (xx == 0); }],
2603                                         [cf_test_ncuconfig=yes],
2604                                         [cf_test_ncuconfig=no],
2605                                         [cf_test_ncuconfig=maybe])],
2606                                 [cf_test_ncuconfig=no])
2607
2608                         CFLAGS="$cf_save_CFLAGS"
2609                         CPPFLAGS="$cf_save_CPPFLAGS"
2610                         LIBS="$cf_save_LIBS"
2611
2612                         if test "x$cf_test_ncuconfig" != xyes; then
2613                                 cf_temp=`echo "x$cf_pkg_cflags" | sed -e s/^x// -e 's/-W[[^     ]]*//g'`
2614                                 cf_pkg_cflags="$cf_temp"
2615                                 cf_temp=`echo "x$cf_pkg_libs" | sed -e s/^x// -e 's/-W[[^       ]]*//g'`
2616                                 cf_pkg_libs="$cf_temp"
2617                         fi
2618                         ;;
2619                 esac
2620
2621                 CF_ADD_CFLAGS($cf_pkg_cflags)
2622                 CF_ADD_LIBS($cf_pkg_libs)
2623
2624                 AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
2625                         [initscr(); mousemask(0,0); tigetstr((char *)0);],
2626                         [AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
2627                                 int main(void)
2628                                 { const char *xx = curses_version(); return (xx == 0); }],
2629                                 [cf_have_ncuconfig=yes],
2630                                 [cf_have_ncuconfig=no],
2631                                 [cf_have_ncuconfig=maybe])],
2632                         [cf_have_ncuconfig=no])
2633                 AC_MSG_RESULT($cf_have_ncuconfig)
2634                 test "$cf_have_ncuconfig" = maybe && cf_have_ncuconfig=yes
2635                 if test "$cf_have_ncuconfig" != "yes"
2636                 then
2637                         CPPFLAGS="$cf_save_CPPFLAGS"
2638                         LIBS="$cf_save_LIBS"
2639                         NCURSES_CONFIG_PKG=none
2640                 else
2641                         AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
2642                         NCURSES_CONFIG_PKG=$cf_ncuconfig_root
2643                         CF_TERM_HEADER
2644                 fi
2645
2646         else
2647                 AC_MSG_RESULT(no)
2648                 NCURSES_CONFIG_PKG=none
2649         fi
2650 else
2651         NCURSES_CONFIG_PKG=none
2652 fi
2653
2654 if test "x$cf_have_ncuconfig" = "xno"; then
2655         cf_ncurses_config="${cf_ncuconfig_root}${NCURSES_CONFIG_SUFFIX}-config"; echo "Looking for ${cf_ncurses_config}"
2656
2657         CF_ACVERSION_CHECK(2.52,
2658                 [AC_CHECK_TOOLS(NCURSES_CONFIG, ${cf_ncurses_config} ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)],
2659                 [AC_PATH_PROGS(NCURSES_CONFIG,  ${cf_ncurses_config} ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}6-config ${cf_ncuconfig_root}5-config, none)])
2660
2661         if test "$NCURSES_CONFIG" != none ; then
2662
2663                 CF_ADD_CFLAGS(`$NCURSES_CONFIG --cflags`)
2664                 CF_ADD_LIBS(`$NCURSES_CONFIG --libs`)
2665
2666                 # even with config script, some packages use no-override for curses.h
2667                 CF_CURSES_HEADER(ifelse($1,,ncurses,$1))
2668
2669                 dnl like CF_NCURSES_CPPFLAGS
2670                 AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
2671
2672                 dnl like CF_NCURSES_LIBS
2673                 CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_ncuconfig_root)
2674                 AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
2675
2676                 dnl like CF_NCURSES_VERSION
2677                 cf_cv_ncurses_version="`$NCURSES_CONFIG --version`"
2678
2679         else
2680
2681                 CF_NCURSES_CPPFLAGS(ifelse($1,,ncurses,$1))
2682                 CF_NCURSES_LIBS(ifelse($1,,ncurses,$1))
2683
2684         fi
2685 else
2686         NCURSES_CONFIG=none
2687 fi
2688 ])dnl
2689 dnl ---------------------------------------------------------------------------
2690 dnl CF_NCURSES_CPPFLAGS version: 22 updated: 2021/01/02 09:31:20
2691 dnl -------------------
2692 dnl Look for the SVr4 curses clone 'ncurses' in the standard places, adjusting
2693 dnl the CPPFLAGS variable so we can include its header.
2694 dnl
2695 dnl The header files may be installed as either curses.h, or ncurses.h (would
2696 dnl be obsolete, except that some packagers prefer this name to distinguish it
2697 dnl from a "native" curses implementation).  If not installed for overwrite,
2698 dnl the curses.h file would be in an ncurses subdirectory (e.g.,
2699 dnl /usr/include/ncurses), but someone may have installed overwriting the
2700 dnl vendor's curses.  Only very old versions (pre-1.9.2d, the first autoconf'd
2701 dnl version) of ncurses don't define either __NCURSES_H or NCURSES_VERSION in
2702 dnl the header.
2703 dnl
2704 dnl If the installer has set $CFLAGS or $CPPFLAGS so that the ncurses header
2705 dnl is already in the include-path, don't even bother with this, since we cannot
2706 dnl easily determine which file it is.  In this case, it has to be <curses.h>.
2707 dnl
2708 dnl The optional parameter gives the root name of the library, in case it is
2709 dnl not installed as the default curses library.  That is how the
2710 dnl wide-character version of ncurses is installed.
2711 AC_DEFUN([CF_NCURSES_CPPFLAGS],
2712 [AC_REQUIRE([CF_WITH_CURSES_DIR])
2713
2714 AC_PROVIDE([CF_CURSES_CPPFLAGS])dnl
2715 cf_ncuhdr_root=ifelse($1,,ncurses,$1)
2716
2717 test -n "$cf_cv_curses_dir" && \
2718 test "$cf_cv_curses_dir" != "no" && { \
2719   CF_ADD_INCDIR($cf_cv_curses_dir/include/$cf_ncuhdr_root)
2720 }
2721
2722 AC_CACHE_CHECK(for $cf_ncuhdr_root header in include-path, cf_cv_ncurses_h,[
2723         cf_header_list="$cf_ncuhdr_root/curses.h $cf_ncuhdr_root/ncurses.h"
2724         { test "$cf_ncuhdr_root" = ncurses || test "$cf_ncuhdr_root" = ncursesw; } && cf_header_list="$cf_header_list curses.h ncurses.h"
2725         for cf_header in $cf_header_list
2726         do
2727                 CF_NCURSES_CC_CHECK(cf_cv_ncurses_h,$cf_header,$1)
2728                 test "$cf_cv_ncurses_h" != no && break
2729         done
2730 ])
2731
2732 CF_NCURSES_HEADER
2733 CF_TERM_HEADER
2734
2735 # some applications need this, but should check for NCURSES_VERSION
2736 AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
2737
2738 CF_NCURSES_VERSION
2739 ])dnl
2740 dnl ---------------------------------------------------------------------------
2741 dnl CF_NCURSES_EXT_FUNCS version: 4 updated: 2012/10/06 16:39:58
2742 dnl --------------------
2743 dnl Since 2007/11/17, ncurses has defined NCURSES_EXT_FUNCS; earlier versions
2744 dnl may provide these functions.  Define the symbol if it is not defined, and
2745 dnl if it is valid.
2746 AC_DEFUN([CF_NCURSES_EXT_FUNCS],
2747 [
2748 AC_CACHE_CHECK(for ncurses extended functions,cf_cv_ncurses_ext_funcs,[
2749 AC_TRY_COMPILE([
2750 #include <${cf_cv_ncurses_header:-curses.h}>],
2751 [
2752 int x = NCURSES_EXT_FUNCS
2753 ],[cf_cv_ncurses_ext_funcs=defined],[
2754 AC_TRY_LINK([
2755 #include <${cf_cv_ncurses_header:-curses.h}>],
2756 [
2757         (void) assume_default_colors (0, 0);
2758         (void) curses_version ();
2759         (void) define_key (0, 0);
2760         (void) is_term_resized (0, 0);
2761         (void) key_defined (0);
2762         (void) keybound (0, 0);
2763         (void) keyok (0, 0);
2764         (void) resize_term (0, 0);
2765         (void) resizeterm (0, 0);
2766         (void) use_default_colors ();
2767         (void) use_extended_names (0);
2768         (void) wresize (0, 0, 0);],
2769         [cf_cv_ncurses_ext_funcs=yes],
2770         [cf_cv_ncurses_ext_funcs=no])
2771 ])
2772 ])
2773 test "$cf_cv_ncurses_ext_funcs" = yes && AC_DEFINE(NCURSES_EXT_FUNCS,1,[Define to 1 if we have ncurses extensions])
2774 ])dnl
2775 dnl ---------------------------------------------------------------------------
2776 dnl CF_NCURSES_HEADER version: 7 updated: 2021/01/04 19:33:05
2777 dnl -----------------
2778 dnl Find a "curses" header file, e.g,. "curses.h", or one of the more common
2779 dnl variations of ncurses' installs.
2780 dnl
2781 dnl See also CF_CURSES_HEADER, which sets the same cache variable.
2782 AC_DEFUN([CF_NCURSES_HEADER],[
2783
2784 if test "$cf_cv_ncurses_h" != no ; then
2785         cf_cv_ncurses_header=$cf_cv_ncurses_h
2786 else
2787
2788 AC_CACHE_CHECK(for $cf_ncuhdr_root include-path, cf_cv_ncurses_h2,[
2789         test -n "$verbose" && echo
2790         CF_HEADER_PATH(cf_search,$cf_ncuhdr_root)
2791         test -n "$verbose" && echo "search path $cf_search"
2792         cf_save2_CPPFLAGS="$CPPFLAGS"
2793         for cf_incdir in $cf_search
2794         do
2795                 CF_ADD_INCDIR($cf_incdir)
2796                 for cf_header in \
2797                         ncurses.h \
2798                         curses.h
2799                 do
2800                         CF_NCURSES_CC_CHECK(cf_cv_ncurses_h2,$cf_header,$1)
2801                         if test "$cf_cv_ncurses_h2" != no ; then
2802                                 cf_cv_ncurses_h2=$cf_incdir/$cf_header
2803                                 test -n "$verbose" && echo $ECHO_N "    ... found $ECHO_C" 1>&AC_FD_MSG
2804                                 break
2805                         fi
2806                         test -n "$verbose" && echo "    ... tested $cf_incdir/$cf_header" 1>&AC_FD_MSG
2807                 done
2808                 CPPFLAGS="$cf_save2_CPPFLAGS"
2809                 test "$cf_cv_ncurses_h2" != no && break
2810         done
2811         test "$cf_cv_ncurses_h2" = no && AC_MSG_ERROR(not found)
2812         ])
2813
2814         CF_DIRNAME(cf_1st_incdir,$cf_cv_ncurses_h2)
2815         cf_cv_ncurses_header="`basename "$cf_cv_ncurses_h2"`"
2816         if test "`basename "$cf_1st_incdir"`" = "$cf_ncuhdr_root" ; then
2817                 cf_cv_ncurses_header="$cf_ncuhdr_root/$cf_cv_ncurses_header"
2818         fi
2819         CF_ADD_INCDIR($cf_1st_incdir)
2820
2821 fi
2822
2823 # Set definitions to allow ifdef'ing for ncurses.h
2824
2825 case "$cf_cv_ncurses_header" in
2826 (*ncurses.h)
2827         AC_DEFINE(HAVE_NCURSES_H,1,[Define to 1 if we have ncurses.h])
2828         ;;
2829 esac
2830
2831 case "$cf_cv_ncurses_header" in
2832 (ncurses/curses.h|ncurses/ncurses.h)
2833         AC_DEFINE(HAVE_NCURSES_NCURSES_H,1,[Define to 1 if we have ncurses/ncurses.h])
2834         ;;
2835 (ncursesw/curses.h|ncursesw/ncurses.h)
2836         AC_DEFINE(HAVE_NCURSESW_NCURSES_H,1,[Define to 1 if we have ncursesw/ncurses.h])
2837         ;;
2838 esac
2839
2840 ])dnl
2841 dnl ---------------------------------------------------------------------------
2842 dnl CF_NCURSES_LIBS version: 20 updated: 2021/01/03 08:05:37
2843 dnl ---------------
2844 dnl Look for the ncurses library.  This is a little complicated on Linux,
2845 dnl because it may be linked with the gpm (general purpose mouse) library.
2846 dnl Some distributions have gpm linked with (bsd) curses, which makes it
2847 dnl unusable with ncurses.  However, we don't want to link with gpm unless
2848 dnl ncurses has a dependency, since gpm is normally set up as a shared library,
2849 dnl and the linker will record a dependency.
2850 dnl
2851 dnl The optional parameter gives the root name of the library, in case it is
2852 dnl not installed as the default curses library.  That is how the
2853 dnl wide-character version of ncurses is installed.
2854 AC_DEFUN([CF_NCURSES_LIBS],
2855 [AC_REQUIRE([CF_NCURSES_CPPFLAGS])
2856
2857 cf_nculib_root=ifelse($1,,ncurses,$1)
2858         # This works, except for the special case where we find gpm, but
2859         # ncurses is in a nonstandard location via $LIBS, and we really want
2860         # to link gpm.
2861 cf_ncurses_LIBS=""
2862 cf_ncurses_SAVE="$LIBS"
2863 AC_CHECK_LIB(gpm,Gpm_Open,
2864         [AC_CHECK_LIB(gpm,initscr,
2865                 [LIBS="$cf_ncurses_SAVE"],
2866                 [cf_ncurses_LIBS="-lgpm"])])
2867
2868 case "$host_os" in
2869 (freebsd*)
2870         # This is only necessary if you are linking against an obsolete
2871         # version of ncurses (but it should do no harm, since it's static).
2872         if test "$cf_nculib_root" = ncurses ; then
2873                 AC_CHECK_LIB(mytinfo,tgoto,[cf_ncurses_LIBS="-lmytinfo $cf_ncurses_LIBS"])
2874         fi
2875         ;;
2876 esac
2877
2878 CF_ADD_LIBS($cf_ncurses_LIBS)
2879
2880 if test -n "$cf_cv_curses_dir" && test "$cf_cv_curses_dir" != "no"
2881 then
2882         CF_ADD_LIBS(-l$cf_nculib_root)
2883 else
2884         CF_FIND_LIBRARY($cf_nculib_root,$cf_nculib_root,
2885                 [#include <${cf_cv_ncurses_header:-curses.h}>],
2886                 [initscr()],
2887                 initscr)
2888 fi
2889
2890 if test -n "$cf_ncurses_LIBS" ; then
2891         AC_MSG_CHECKING(if we can link $cf_nculib_root without $cf_ncurses_LIBS)
2892         cf_ncurses_SAVE="$LIBS"
2893         for p in $cf_ncurses_LIBS ; do
2894                 q=`echo "$LIBS" | sed -e "s%$p %%" -e "s%$p$%%"`
2895                 if test "$q" != "$LIBS" ; then
2896                         LIBS="$q"
2897                 fi
2898         done
2899         AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
2900                 [initscr(); mousemask(0,0); tigetstr((char *)0);],
2901                 [AC_MSG_RESULT(yes)],
2902                 [AC_MSG_RESULT(no)
2903                  LIBS="$cf_ncurses_SAVE"])
2904 fi
2905
2906 CF_UPPER(cf_nculib_ROOT,HAVE_LIB$cf_nculib_root)
2907 AC_DEFINE_UNQUOTED($cf_nculib_ROOT)
2908 ])dnl
2909 dnl ---------------------------------------------------------------------------
2910 dnl CF_NCURSES_PTHREADS version: 2 updated: 2016/04/22 05:07:41
2911 dnl -------------------
2912 dnl Use this followup check to ensure that we link with pthreads if ncurses
2913 dnl uses it.
2914 AC_DEFUN([CF_NCURSES_PTHREADS],[
2915 : ${cf_nculib_root:=ifelse($1,,ncurses,$1)}
2916 AC_CHECK_LIB($cf_nculib_root,_nc_init_pthreads,
2917         cf_cv_ncurses_pthreads=yes,
2918         cf_cv_ncurses_pthreads=no)
2919 if test "$cf_cv_ncurses_pthreads" = yes
2920 then
2921         CF_ADD_LIBS(-lpthread)
2922 fi
2923 ])dnl
2924 dnl ---------------------------------------------------------------------------
2925 dnl CF_NCURSES_VERSION version: 16 updated: 2020/12/31 20:19:42
2926 dnl ------------------
2927 dnl Check for the version of ncurses, to aid in reporting bugs, etc.
2928 dnl Call CF_CURSES_CPPFLAGS first, or CF_NCURSES_CPPFLAGS.  We don't use
2929 dnl AC_REQUIRE since that does not work with the shell's if/then/else/fi.
2930 AC_DEFUN([CF_NCURSES_VERSION],
2931 [
2932 AC_REQUIRE([CF_CURSES_CPPFLAGS])dnl
2933 AC_CACHE_CHECK(for ncurses version, cf_cv_ncurses_version,[
2934         cf_cv_ncurses_version=no
2935         cf_tempfile=out$$
2936         rm -f "$cf_tempfile"
2937         AC_TRY_RUN([
2938 #include <${cf_cv_ncurses_header:-curses.h}>
2939 #include <stdio.h>
2940 int main(void)
2941 {
2942         FILE *fp = fopen("$cf_tempfile", "w");
2943 #ifdef NCURSES_VERSION
2944 # ifdef NCURSES_VERSION_PATCH
2945         fprintf(fp, "%s.%d\\n", NCURSES_VERSION, NCURSES_VERSION_PATCH);
2946 # else
2947         fprintf(fp, "%s\\n", NCURSES_VERSION);
2948 # endif
2949 #else
2950 # ifdef __NCURSES_H
2951         fprintf(fp, "old\\n");
2952 # else
2953         make an error
2954 # endif
2955 #endif
2956         ${cf_cv_main_return:-return}(0);
2957 }],[
2958         cf_cv_ncurses_version=`cat $cf_tempfile`],,[
2959
2960         # This will not work if the preprocessor splits the line after the
2961         # Autoconf token.  The 'unproto' program does that.
2962         cat > "conftest.$ac_ext" <<EOF
2963 #include <${cf_cv_ncurses_header:-curses.h}>
2964 #undef Autoconf
2965 #ifdef NCURSES_VERSION
2966 Autoconf NCURSES_VERSION
2967 #else
2968 #ifdef __NCURSES_H
2969 Autoconf "old"
2970 #endif
2971 ;
2972 #endif
2973 EOF
2974         cf_try="$ac_cpp conftest.$ac_ext 2>&AC_FD_CC | grep '^Autoconf ' >conftest.out"
2975         AC_TRY_EVAL(cf_try)
2976         if test -f conftest.out ; then
2977                 cf_out=`sed -e 's%^Autoconf %%' -e 's%^[[^"]]*"%%' -e 's%".*%%' conftest.out`
2978                 test -n "$cf_out" && cf_cv_ncurses_version="$cf_out"
2979                 rm -f conftest.out
2980         fi
2981 ])
2982         rm -f "$cf_tempfile"
2983 ])
2984 test "$cf_cv_ncurses_version" = no || AC_DEFINE(NCURSES,1,[Define to 1 if we are using ncurses headers/libraries])
2985 ])dnl
2986 dnl ---------------------------------------------------------------------------
2987 dnl CF_NCURSES_WRAP_PREFIX version: 1 updated: 2009/03/28 16:08:10
2988 dnl ----------------------
2989 dnl Check for ncurses "wrap-prefix" used for public variables which have been
2990 dnl wrapped with a function to help with concurrency control.
2991 AC_DEFUN([CF_NCURSES_WRAP_PREFIX],
2992 [
2993 AC_MSG_CHECKING(for ncurses wrap-prefix)
2994 AC_ARG_WITH(ncurses-wrap-prefix,
2995         [  --with-ncurses-wrap-prefix naming-prefix for ncurses wrapped-variables],
2996         [NCURSES_WRAP_PREFIX=$withval],
2997         [NCURSES_WRAP_PREFIX=_nc_])
2998 AC_MSG_RESULT($NCURSES_WRAP_PREFIX)
2999
3000 AC_SUBST(NCURSES_WRAP_PREFIX)
3001 ])
3002 dnl ---------------------------------------------------------------------------
3003 dnl CF_NETBSD_FORM_H version: 2 updated: 2012/10/06 16:39:58
3004 dnl ----------------
3005 dnl Check for NetBSD's form.h, which is incompatible with SVr4 and ncurses.
3006 dnl Some workarounds are needed in client programs to allow them to compile.
3007 AC_DEFUN([CF_NETBSD_FORM_H],[
3008 AC_CACHE_CHECK(for NetBSD form.h,cf_cv_netbsd_form_h,[
3009 AC_TRY_COMPILE([
3010 #include <${cf_cv_ncurses_header:-curses.h}>
3011 #include <form.h>
3012 ],[
3013         FORM *form;
3014         int y = current_field(form)->cursor_ypos;
3015         int x = current_field(form)->cursor_xpos;
3016 ],[cf_cv_netbsd_form_h=yes
3017 ],[cf_cv_netbsd_form_h=no])
3018 ])
3019
3020 test "$cf_cv_netbsd_form_h" = yes && AC_DEFINE(HAVE_NETBSD_FORM_H,1,[Define to 1 if we appear to be using NetBSD form.h])
3021 ])dnl
3022 dnl ---------------------------------------------------------------------------
3023 dnl CF_NETBSD_MENU_H version: 2 updated: 2012/10/06 16:39:58
3024 dnl ----------------
3025 dnl Check for NetBSD's menu.h, which is incompatible with SVr4 and ncurses.
3026 dnl Some workarounds are needed in client programs to allow them to compile.
3027 AC_DEFUN([CF_NETBSD_MENU_H],[
3028 AC_CACHE_CHECK(for NetBSD menu.h,cf_cv_netbsd_menu_h,[
3029 AC_TRY_COMPILE([
3030 #include <${cf_cv_ncurses_header:-curses.h}>
3031 #include <menu.h>
3032 ],[
3033         MENU *menu;
3034         int y = menu->max_item_width;
3035 ],[cf_cv_netbsd_menu_h=yes
3036 ],[cf_cv_netbsd_menu_h=no])
3037 ])
3038
3039 test "$cf_cv_netbsd_menu_h" = yes && AC_DEFINE(HAVE_NETBSD_MENU_H,1,[Define to 1 if we appear to be using NetBSD menu.h])
3040 ])dnl
3041 dnl ---------------------------------------------------------------------------
3042 dnl CF_NO_LEAKS_OPTION version: 9 updated: 2021/06/13 19:45:41
3043 dnl ------------------
3044 dnl see CF_WITH_NO_LEAKS
3045 dnl
3046 dnl $1 = option/name
3047 dnl $2 = help-text
3048 dnl $3 = symbol to define if the option is set
3049 dnl $4 = additional actions to take if the option is set
3050 AC_DEFUN([CF_NO_LEAKS_OPTION],[
3051 AC_MSG_CHECKING(if you want to use $1 for testing)
3052 AC_ARG_WITH($1,
3053         [$2],
3054         [case "x$withval" in
3055         (x|xno) ;;
3056         (*)
3057                 : "${with_cflags:=-g}"
3058                 : "${enable_leaks:=no}"
3059                 with_$1=yes
3060                 AC_DEFINE_UNQUOTED($3,1,"Define to 1 if you want to use $1 for testing.")ifelse([$4],,[
3061          $4
3062 ])
3063                 ;;
3064         esac],
3065         [with_$1=])
3066 AC_MSG_RESULT(${with_$1:-no})
3067
3068 case ".$with_cflags" in
3069 (.*-g*)
3070         case .$CFLAGS in
3071         (.*-g*)
3072                 ;;
3073         (*)
3074                 CF_ADD_CFLAGS([-g])
3075                 ;;
3076         esac
3077         ;;
3078 esac
3079 ])dnl
3080 dnl ---------------------------------------------------------------------------
3081 dnl CF_PATH_SYNTAX version: 18 updated: 2020/12/31 18:40:20
3082 dnl --------------
3083 dnl Check the argument to see that it looks like a pathname.  Rewrite it if it
3084 dnl begins with one of the prefix/exec_prefix variables, and then again if the
3085 dnl result begins with 'NONE'.  This is necessary to work around autoconf's
3086 dnl delayed evaluation of those symbols.
3087 AC_DEFUN([CF_PATH_SYNTAX],[
3088 if test "x$prefix" != xNONE; then
3089         cf_path_syntax="$prefix"
3090 else
3091         cf_path_syntax="$ac_default_prefix"
3092 fi
3093
3094 case ".[$]$1" in
3095 (.\[$]\(*\)*|.\'*\'*)
3096         ;;
3097 (..|./*|.\\*)
3098         ;;
3099 (.[[a-zA-Z]]:[[\\/]]*) # OS/2 EMX
3100         ;;
3101 (.\[$]\{*prefix\}*|.\[$]\{*dir\}*)
3102         eval $1="[$]$1"
3103         case ".[$]$1" in
3104         (.NONE/*)
3105                 $1=`echo "[$]$1" | sed -e s%NONE%$cf_path_syntax%`
3106                 ;;
3107         esac
3108         ;;
3109 (.no|.NONE/*)
3110         $1=`echo "[$]$1" | sed -e s%NONE%$cf_path_syntax%`
3111         ;;
3112 (*)
3113         ifelse([$2],,[AC_MSG_ERROR([expected a pathname, not \"[$]$1\"])],$2)
3114         ;;
3115 esac
3116 ])dnl
3117 dnl ---------------------------------------------------------------------------
3118 dnl CF_PDCURSES_X11 version: 15 updated: 2021/01/02 09:31:20
3119 dnl ---------------
3120 dnl Configure for PDCurses' X11 library
3121 AC_DEFUN([CF_PDCURSES_X11],[
3122 AC_REQUIRE([CF_X_ATHENA])
3123
3124 CF_ACVERSION_CHECK(2.52,
3125         [AC_CHECK_TOOLS(XCURSES_CONFIG, xcurses-config, none)],
3126         [AC_PATH_PROGS(XCURSES_CONFIG, xcurses-config, none)])
3127
3128 if test "$XCURSES_CONFIG" != none ; then
3129
3130 CF_ADD_CFLAGS(`$XCURSES_CONFIG --cflags`)
3131 CF_ADD_LIBS(`$XCURSES_CONFIG --libs`)
3132
3133 cf_cv_lib_XCurses=yes
3134
3135 else
3136
3137 LDFLAGS="$LDFLAGS $X_LIBS"
3138 CF_CHECK_CFLAGS($X_CFLAGS)
3139 AC_CHECK_LIB(X11,XOpenDisplay,
3140         [CF_ADD_LIBS(-lX11)],,
3141         [$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])
3142 AC_CACHE_CHECK(for XCurses library,cf_cv_lib_XCurses,[
3143 CF_ADD_LIBS(-lXCurses)
3144 AC_TRY_LINK([
3145 #include <xcurses.h>
3146 char *XCursesProgramName = "test";
3147 ],[XCursesExit();],
3148 [cf_cv_lib_XCurses=yes],
3149 [cf_cv_lib_XCurses=no])
3150 ])
3151
3152 fi
3153
3154 if test "$cf_cv_lib_XCurses" = yes ; then
3155         AC_DEFINE(UNIX,1,[Define to 1 if using PDCurses on Unix])
3156         AC_DEFINE(XCURSES,1,[Define to 1 if using PDCurses on Unix])
3157         AC_CHECK_HEADER(xcurses.h, AC_DEFINE(HAVE_XCURSES,1,[Define to 1 if using PDCurses on Unix]))
3158 else
3159         AC_MSG_ERROR(Cannot link with XCurses)
3160 fi
3161 ])dnl
3162 dnl ---------------------------------------------------------------------------
3163 dnl CF_PKG_CONFIG version: 11 updated: 2021/01/01 13:31:04
3164 dnl -------------
3165 dnl Check for the package-config program, unless disabled by command-line.
3166 AC_DEFUN([CF_PKG_CONFIG],
3167 [
3168 AC_MSG_CHECKING(if you want to use pkg-config)
3169 AC_ARG_WITH(pkg-config,
3170         [  --with-pkg-config{=path} enable/disable use of pkg-config],
3171         [cf_pkg_config=$withval],
3172         [cf_pkg_config=yes])
3173 AC_MSG_RESULT($cf_pkg_config)
3174
3175 case "$cf_pkg_config" in
3176 (no)
3177         PKG_CONFIG=none
3178         ;;
3179 (yes)
3180         CF_ACVERSION_CHECK(2.52,
3181                 [AC_PATH_TOOL(PKG_CONFIG, pkg-config, none)],
3182                 [AC_PATH_PROG(PKG_CONFIG, pkg-config, none)])
3183         ;;
3184 (*)
3185         PKG_CONFIG=$withval
3186         ;;
3187 esac
3188
3189 test -z "$PKG_CONFIG" && PKG_CONFIG=none
3190 if test "$PKG_CONFIG" != none ; then
3191         CF_PATH_SYNTAX(PKG_CONFIG)
3192 elif test "x$cf_pkg_config" != xno ; then
3193         AC_MSG_WARN(pkg-config is not installed)
3194 fi
3195
3196 AC_SUBST(PKG_CONFIG)
3197 ])dnl
3198 dnl ---------------------------------------------------------------------------
3199 dnl CF_POSIX_C_SOURCE version: 11 updated: 2018/12/31 20:46:17
3200 dnl -----------------
3201 dnl Define _POSIX_C_SOURCE to the given level, and _POSIX_SOURCE if needed.
3202 dnl
3203 dnl     POSIX.1-1990                            _POSIX_SOURCE
3204 dnl     POSIX.1-1990 and                        _POSIX_SOURCE and
3205 dnl             POSIX.2-1992 C-Language                 _POSIX_C_SOURCE=2
3206 dnl             Bindings Option
3207 dnl     POSIX.1b-1993                           _POSIX_C_SOURCE=199309L
3208 dnl     POSIX.1c-1996                           _POSIX_C_SOURCE=199506L
3209 dnl     X/Open 2000                             _POSIX_C_SOURCE=200112L
3210 dnl
3211 dnl Parameters:
3212 dnl     $1 is the nominal value for _POSIX_C_SOURCE
3213 AC_DEFUN([CF_POSIX_C_SOURCE],
3214 [AC_REQUIRE([CF_POSIX_VISIBLE])dnl
3215
3216 if test "$cf_cv_posix_visible" = no; then
3217
3218 cf_POSIX_C_SOURCE=ifelse([$1],,199506L,[$1])
3219
3220 cf_save_CFLAGS="$CFLAGS"
3221 cf_save_CPPFLAGS="$CPPFLAGS"
3222
3223 CF_REMOVE_DEFINE(cf_trim_CFLAGS,$cf_save_CFLAGS,_POSIX_C_SOURCE)
3224 CF_REMOVE_DEFINE(cf_trim_CPPFLAGS,$cf_save_CPPFLAGS,_POSIX_C_SOURCE)
3225
3226 AC_CACHE_CHECK(if we should define _POSIX_C_SOURCE,cf_cv_posix_c_source,[
3227         CF_MSG_LOG(if the symbol is already defined go no further)
3228         AC_TRY_COMPILE([#include <sys/types.h>],[
3229 #ifndef _POSIX_C_SOURCE
3230 make an error
3231 #endif],
3232         [cf_cv_posix_c_source=no],
3233         [cf_want_posix_source=no
3234          case .$cf_POSIX_C_SOURCE in
3235          (.[[12]]??*)
3236                 cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
3237                 ;;
3238          (.2)
3239                 cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
3240                 cf_want_posix_source=yes
3241                 ;;
3242          (.*)
3243                 cf_want_posix_source=yes
3244                 ;;
3245          esac
3246          if test "$cf_want_posix_source" = yes ; then
3247                 AC_TRY_COMPILE([#include <sys/types.h>],[
3248 #ifdef _POSIX_SOURCE
3249 make an error
3250 #endif],[],
3251                 cf_cv_posix_c_source="$cf_cv_posix_c_source -D_POSIX_SOURCE")
3252          fi
3253          CF_MSG_LOG(ifdef from value $cf_POSIX_C_SOURCE)
3254          CFLAGS="$cf_trim_CFLAGS"
3255          CPPFLAGS="$cf_trim_CPPFLAGS"
3256          CF_APPEND_TEXT(CPPFLAGS,$cf_cv_posix_c_source)
3257          CF_MSG_LOG(if the second compile does not leave our definition intact error)
3258          AC_TRY_COMPILE([#include <sys/types.h>],[
3259 #ifndef _POSIX_C_SOURCE
3260 make an error
3261 #endif],,
3262          [cf_cv_posix_c_source=no])
3263          CFLAGS="$cf_save_CFLAGS"
3264          CPPFLAGS="$cf_save_CPPFLAGS"
3265         ])
3266 ])
3267
3268 if test "$cf_cv_posix_c_source" != no ; then
3269         CFLAGS="$cf_trim_CFLAGS"
3270         CPPFLAGS="$cf_trim_CPPFLAGS"
3271         CF_ADD_CFLAGS($cf_cv_posix_c_source)
3272 fi
3273
3274 fi # cf_cv_posix_visible
3275
3276 ])dnl
3277 dnl ---------------------------------------------------------------------------
3278 dnl CF_POSIX_VISIBLE version: 1 updated: 2018/12/31 20:46:17
3279 dnl ----------------
3280 dnl POSIX documents test-macros which an application may set before any system
3281 dnl headers are included to make features available.
3282 dnl
3283 dnl Some BSD platforms (originally FreeBSD, but copied by a few others)
3284 dnl diverged from POSIX in 2002 by setting symbols which make all of the most
3285 dnl recent features visible in the system header files unless the application
3286 dnl overrides the corresponding test-macros.  Doing that introduces portability
3287 dnl problems.
3288 dnl
3289 dnl This macro makes a special check for the symbols used for this, to avoid a
3290 dnl conflicting definition.
3291 AC_DEFUN([CF_POSIX_VISIBLE],
3292 [
3293 AC_CACHE_CHECK(if the POSIX test-macros are already defined,cf_cv_posix_visible,[
3294 AC_TRY_COMPILE([#include <stdio.h>],[
3295 #if defined(__POSIX_VISIBLE) && ((__POSIX_VISIBLE - 0L) > 0) \
3296         && defined(__XSI_VISIBLE) && ((__XSI_VISIBLE - 0L) > 0) \
3297         && defined(__BSD_VISIBLE) && ((__BSD_VISIBLE - 0L) > 0) \
3298         && defined(__ISO_C_VISIBLE) && ((__ISO_C_VISIBLE - 0L) > 0)
3299 #error conflicting symbols found
3300 #endif
3301 ],[cf_cv_posix_visible=no],[cf_cv_posix_visible=yes])
3302 ])
3303 ])dnl
3304 dnl ---------------------------------------------------------------------------
3305 dnl CF_PRG_RULES version: 2 updated: 2021/01/01 13:31:04
3306 dnl ------------
3307 dnl Append definitions and rules for the given programs to the subdirectory
3308 dnl Makefiles, and the recursion rule for the top-level Makefile.
3309 dnl
3310 dnl parameters
3311 dnl     $1 = script to run
3312 dnl     $2 = list of subdirectories
3313 dnl
3314 dnl variables
3315 dnl     $AWK
3316 AC_DEFUN([CF_PRG_RULES],
3317 [
3318 for cf_dir in $2
3319 do
3320         if test ! -d "$srcdir/$cf_dir" ; then
3321                 continue
3322         elif test -f "$srcdir/$cf_dir/programs" ; then
3323                 $AWK -f $1 "$srcdir/$cf_dir/programs" >>$cf_dir/Makefile
3324         fi
3325 done
3326
3327 ])dnl
3328 dnl ---------------------------------------------------------------------------
3329 dnl CF_PROG_CC version: 5 updated: 2019/12/31 08:53:54
3330 dnl ----------
3331 dnl standard check for CC, plus followup sanity checks
3332 dnl $1 = optional parameter to pass to AC_PROG_CC to specify compiler name
3333 AC_DEFUN([CF_PROG_CC],[
3334 CF_ACVERSION_CHECK(2.53,
3335         [AC_MSG_WARN(this will incorrectly handle gnatgcc choice)
3336          AC_REQUIRE([AC_PROG_CC])],
3337         [])
3338 ifelse($1,,[AC_PROG_CC],[AC_PROG_CC($1)])
3339 CF_GCC_VERSION
3340 CF_ACVERSION_CHECK(2.52,
3341         [AC_PROG_CC_STDC],
3342         [CF_ANSI_CC_REQD])
3343 CF_CC_ENV_FLAGS
3344 ])dnl
3345 dnl ---------------------------------------------------------------------------
3346 dnl CF_PROG_INSTALL version: 10 updated: 2021/01/04 19:33:05
3347 dnl ---------------
3348 dnl Force $INSTALL to be an absolute-path.  Otherwise, edit_man.sh and the
3349 dnl misc/tabset install won't work properly.  Usually this happens only when
3350 dnl using the fallback mkinstalldirs script
3351 AC_DEFUN([CF_PROG_INSTALL],
3352 [AC_PROG_INSTALL
3353 case $INSTALL in
3354 (/*)
3355         ;;
3356 (*)
3357         CF_DIRNAME(cf_dir,$INSTALL)
3358         test -z "$cf_dir" && cf_dir=.
3359         INSTALL="`cd \"$cf_dir\" && pwd`"/"`echo "$INSTALL" | sed -e 's%^.*/%%'`"
3360         ;;
3361 esac
3362 ])dnl
3363 dnl ---------------------------------------------------------------------------
3364 dnl CF_PROG_LINT version: 4 updated: 2019/11/20 18:55:37
3365 dnl ------------
3366 AC_DEFUN([CF_PROG_LINT],
3367 [
3368 AC_CHECK_PROGS(LINT, lint cppcheck splint)
3369 case "x$LINT" in
3370 (xcppcheck|x*/cppcheck)
3371         test -z "$LINT_OPTS" && LINT_OPTS="--enable=all"
3372         ;;
3373 esac
3374 AC_SUBST(LINT_OPTS)
3375 ])dnl
3376 dnl ---------------------------------------------------------------------------
3377 dnl CF_REMOVE_DEFINE version: 3 updated: 2010/01/09 11:05:50
3378 dnl ----------------
3379 dnl Remove all -U and -D options that refer to the given symbol from a list
3380 dnl of C compiler options.  This works around the problem that not all
3381 dnl compilers process -U and -D options from left-to-right, so a -U option
3382 dnl cannot be used to cancel the effect of a preceding -D option.
3383 dnl
3384 dnl $1 = target (which could be the same as the source variable)
3385 dnl $2 = source (including '$')
3386 dnl $3 = symbol to remove
3387 define([CF_REMOVE_DEFINE],
3388 [
3389 $1=`echo "$2" | \
3390         sed     -e 's/-[[UD]]'"$3"'\(=[[^       ]]*\)\?[[       ]]/ /g' \
3391                 -e 's/-[[UD]]'"$3"'\(=[[^       ]]*\)\?[$]//g'`
3392 ])dnl
3393 dnl ---------------------------------------------------------------------------
3394 dnl CF_RESTORE_XTRA_FLAGS version: 1 updated: 2020/01/11 16:47:45
3395 dnl ---------------------
3396 dnl Restore flags saved in CF_SAVE_XTRA_FLAGS
3397 dnl $1 = name of current macro
3398 define([CF_RESTORE_XTRA_FLAGS],
3399 [
3400 LIBS="$cf_save_LIBS_$1"
3401 CFLAGS="$cf_save_CFLAGS_$1"
3402 CPPFLAGS="$cf_save_CPPFLAGS_$1"
3403 ])dnl
3404 dnl ---------------------------------------------------------------------------
3405 dnl CF_RPATH_HACK version: 13 updated: 2021/01/03 18:30:50
3406 dnl -------------
3407 AC_DEFUN([CF_RPATH_HACK],
3408 [AC_REQUIRE([AC_PROG_FGREP])dnl
3409 AC_REQUIRE([CF_LD_RPATH_OPT])dnl
3410
3411 AC_MSG_CHECKING(for updated LDFLAGS)
3412 if test -n "$LD_RPATH_OPT" ; then
3413         AC_MSG_RESULT(maybe)
3414
3415         AC_CHECK_PROGS(cf_ldd_prog,ldd,no)
3416         cf_rpath_list="/usr/lib /lib"
3417         if test "$cf_ldd_prog" != no
3418         then
3419                 cf_rpath_oops=
3420
3421 AC_TRY_LINK([#include <stdio.h>],
3422                 [printf("Hello");],
3423                 [cf_rpath_oops=`"$cf_ldd_prog" "conftest$ac_exeext" | ${FGREP-fgrep} ' not found' | sed -e 's% =>.*$%%' |sort | uniq`
3424                  cf_rpath_list=`"$cf_ldd_prog" "conftest$ac_exeext" | ${FGREP-fgrep} / | sed -e 's%^.*[[        ]]/%/%' -e 's%/[[^/]][[^/]]*$%%' |sort | uniq`])
3425
3426                 # If we passed the link-test, but get a "not found" on a given library,
3427                 # this could be due to inept reconfiguration of gcc to make it only
3428                 # partly honor /usr/local/lib (or whatever).  Sometimes this behavior
3429                 # is intentional, e.g., installing gcc in /usr/bin and suppressing the
3430                 # /usr/local libraries.
3431                 if test -n "$cf_rpath_oops"
3432                 then
3433                         for cf_rpath_src in $cf_rpath_oops
3434                         do
3435                                 for cf_rpath_dir in \
3436                                         /usr/local \
3437                                         /usr/pkg \
3438                                         /opt/sfw
3439                                 do
3440                                         if test -f "$cf_rpath_dir/lib/$cf_rpath_src"
3441                                         then
3442                                                 CF_VERBOSE(...adding -L$cf_rpath_dir/lib to LDFLAGS for $cf_rpath_src)
3443                                                 LDFLAGS="$LDFLAGS -L$cf_rpath_dir/lib"
3444                                                 break
3445                                         fi
3446                                 done
3447                         done
3448                 fi
3449         fi
3450
3451         CF_VERBOSE(...checking EXTRA_LDFLAGS $EXTRA_LDFLAGS)
3452
3453         CF_RPATH_HACK_2(LDFLAGS)
3454         CF_RPATH_HACK_2(LIBS)
3455
3456         CF_VERBOSE(...checked EXTRA_LDFLAGS $EXTRA_LDFLAGS)
3457 else
3458         AC_MSG_RESULT(no)
3459 fi
3460 AC_SUBST(EXTRA_LDFLAGS)
3461 ])dnl
3462 dnl ---------------------------------------------------------------------------
3463 dnl CF_RPATH_HACK_2 version: 8 updated: 2021/01/01 13:31:04
3464 dnl ---------------
3465 dnl Do one set of substitutions for CF_RPATH_HACK, adding an rpath option to
3466 dnl EXTRA_LDFLAGS for each -L option found.
3467 dnl
3468 dnl $cf_rpath_list contains a list of directories to ignore.
3469 dnl
3470 dnl $1 = variable name to update.  The LDFLAGS variable should be the only one,
3471 dnl      but LIBS often has misplaced -L options.
3472 AC_DEFUN([CF_RPATH_HACK_2],
3473 [
3474 CF_VERBOSE(...checking $1 [$]$1)
3475
3476 cf_rpath_dst=
3477 for cf_rpath_src in [$]$1
3478 do
3479         case "$cf_rpath_src" in
3480         (-L*)
3481
3482                 # check if this refers to a directory which we will ignore
3483                 cf_rpath_skip=no
3484                 if test -n "$cf_rpath_list"
3485                 then
3486                         for cf_rpath_item in $cf_rpath_list
3487                         do
3488                                 if test "x$cf_rpath_src" = "x-L$cf_rpath_item"
3489                                 then
3490                                         cf_rpath_skip=yes
3491                                         break
3492                                 fi
3493                         done
3494                 fi
3495
3496                 if test "$cf_rpath_skip" = no
3497                 then
3498                         # transform the option
3499                         if test "$LD_RPATH_OPT" = "-R " ; then
3500                                 cf_rpath_tmp=`echo "$cf_rpath_src" |sed -e "s%-L%-R %"`
3501                         else
3502                                 cf_rpath_tmp=`echo "$cf_rpath_src" |sed -e "s%-L%$LD_RPATH_OPT%"`
3503                         fi
3504
3505                         # if we have not already added this, add it now
3506                         cf_rpath_tst=`echo "$EXTRA_LDFLAGS" | sed -e "s%$cf_rpath_tmp %%"`
3507                         if test "x$cf_rpath_tst" = "x$EXTRA_LDFLAGS"
3508                         then
3509                                 CF_VERBOSE(...Filter $cf_rpath_src ->$cf_rpath_tmp)
3510                                 EXTRA_LDFLAGS="$cf_rpath_tmp $EXTRA_LDFLAGS"
3511                         fi
3512                 fi
3513                 ;;
3514         esac
3515         cf_rpath_dst="$cf_rpath_dst $cf_rpath_src"
3516 done
3517 $1=$cf_rpath_dst
3518
3519 CF_VERBOSE(...checked $1 [$]$1)
3520 AC_SUBST(EXTRA_LDFLAGS)
3521 ])dnl
3522 dnl ---------------------------------------------------------------------------
3523 dnl CF_SAVE_XTRA_FLAGS version: 1 updated: 2020/01/11 16:46:44
3524 dnl ------------------
3525 dnl Use this macro to save CFLAGS/CPPFLAGS/LIBS before checks against X headers
3526 dnl and libraries which do not update those variables.
3527 dnl
3528 dnl $1 = name of current macro
3529 define([CF_SAVE_XTRA_FLAGS],
3530 [
3531 cf_save_LIBS_$1="$LIBS"
3532 cf_save_CFLAGS_$1="$CFLAGS"
3533 cf_save_CPPFLAGS_$1="$CPPFLAGS"
3534 LIBS="$LIBS ${X_PRE_LIBS} ${X_LIBS} ${X_EXTRA_LIBS}"
3535 for cf_X_CFLAGS in $X_CFLAGS
3536 do
3537         case "x$cf_X_CFLAGS" in
3538         x-[[IUD]]*)
3539                 CPPFLAGS="$CPPFLAGS $cf_X_CFLAGS"
3540                 ;;
3541         *)
3542                 CFLAGS="$CFLAGS $cf_X_CFLAGS"
3543                 ;;
3544         esac
3545 done
3546 ])dnl
3547 dnl ---------------------------------------------------------------------------
3548 dnl CF_SIGWINCH version: 6 updated: 2021/01/01 13:31:04
3549 dnl -----------
3550 dnl Use this macro after CF_XOPEN_SOURCE, but do not require it (not all
3551 dnl programs need this test).
3552 dnl
3553 dnl This is really a Mac OS X 10.4.3 workaround.  Defining _POSIX_C_SOURCE
3554 dnl forces SIGWINCH to be undefined (breaks xterm, ncurses).  Oddly, the struct
3555 dnl winsize declaration is left alone - we may revisit this if Apple choose to
3556 dnl break that part of the interface as well.
3557 AC_DEFUN([CF_SIGWINCH],
3558 [
3559 AC_CACHE_CHECK(if SIGWINCH is defined,cf_cv_define_sigwinch,[
3560         AC_TRY_COMPILE([
3561 #include <sys/types.h>
3562 #include <sys/signal.h>
3563 ],[int x = SIGWINCH; (void)x],
3564         [cf_cv_define_sigwinch=yes],
3565         [AC_TRY_COMPILE([
3566 #undef _XOPEN_SOURCE
3567 #undef _POSIX_SOURCE
3568 #undef _POSIX_C_SOURCE
3569 #include <sys/types.h>
3570 #include <sys/signal.h>
3571 ],[int x = SIGWINCH; (void)x],
3572         [cf_cv_define_sigwinch=maybe],
3573         [cf_cv_define_sigwinch=no])
3574 ])
3575 ])
3576
3577 if test "$cf_cv_define_sigwinch" = maybe ; then
3578 AC_CACHE_CHECK(for actual SIGWINCH definition,cf_cv_fixup_sigwinch,[
3579 cf_cv_fixup_sigwinch=unknown
3580 cf_sigwinch=32
3581 while test "$cf_sigwinch" != 1
3582 do
3583         AC_TRY_COMPILE([
3584 #undef _XOPEN_SOURCE
3585 #undef _POSIX_SOURCE
3586 #undef _POSIX_C_SOURCE
3587 #include <sys/types.h>
3588 #include <sys/signal.h>
3589 ],[
3590 #if SIGWINCH != $cf_sigwinch
3591 make an error
3592 #endif
3593 int x = SIGWINCH; (void)x],
3594         [cf_cv_fixup_sigwinch=$cf_sigwinch
3595          break])
3596
3597 cf_sigwinch="`expr "$cf_sigwinch" - 1`"
3598 done
3599 ])
3600
3601         if test "$cf_cv_fixup_sigwinch" != unknown ; then
3602                 CPPFLAGS="$CPPFLAGS -DSIGWINCH=$cf_cv_fixup_sigwinch"
3603         fi
3604 fi
3605 ])dnl
3606 dnl ---------------------------------------------------------------------------
3607 dnl CF_SIG_ATOMIC_T version: 5 updated: 2020/03/10 18:53:47
3608 dnl ---------------
3609 dnl signal handler, but there are some gcc dependencies in that recommendation.
3610 dnl Try anyway.
3611 AC_DEFUN([CF_SIG_ATOMIC_T],
3612 [
3613 AC_MSG_CHECKING(for signal global datatype)
3614 AC_CACHE_VAL(cf_cv_sig_atomic_t,[
3615         for cf_type in \
3616                 "volatile sig_atomic_t" \
3617                 "sig_atomic_t" \
3618                 "int"
3619         do
3620         AC_TRY_COMPILE([
3621 #include <sys/types.h>
3622 #include <signal.h>
3623 #include <stdio.h>
3624
3625 extern $cf_type x;
3626 $cf_type x;
3627 static void handler(int sig)
3628 {
3629         (void)sig;
3630         x = 5;
3631 }],
3632                 [signal(SIGINT, handler);
3633                  x = 1],
3634                 [cf_cv_sig_atomic_t=$cf_type],
3635                 [cf_cv_sig_atomic_t=no])