]> ncurses.scripts.mit.edu Git - ncurses.git/blobdiff - test/aclocal.m4
ncurses 6.2 - patch 20201114
[ncurses.git] / test / aclocal.m4
index 788c1bbd64b2853389f4659b8ee6739ff82e6493..1d2d925bc6df4a71b8377f56d9b7ac078c294f30 100644 (file)
@@ -27,7 +27,7 @@ dnl sale, use or other dealings in this Software without prior written       *
 dnl authorization.                                                           *
 dnl***************************************************************************
 dnl
-dnl $Id: aclocal.m4,v 1.176 2020/02/09 02:02:53 tom Exp $
+dnl $Id: aclocal.m4,v 1.185 2020/11/14 15:26:19 tom Exp $
 dnl
 dnl Author: Thomas E. Dickey
 dnl
@@ -43,7 +43,7 @@ dnl           https://invisible-island.net/autoconf/my-autoconf.html
 dnl
 dnl ---------------------------------------------------------------------------
 dnl ---------------------------------------------------------------------------
-dnl AM_LANGINFO_CODESET version: 4 updated: 2015/04/18 08:56:57
+dnl AM_LANGINFO_CODESET version: 5 updated: 2020/03/10 18:53:47
 dnl -------------------
 dnl Inserted as requested by gettext 0.10.40
 dnl File from /usr/share/aclocal
@@ -56,7 +56,7 @@ AC_DEFUN([AM_LANGINFO_CODESET],
 [
 AC_CACHE_CHECK([for nl_langinfo and CODESET], am_cv_langinfo_codeset,
        [AC_TRY_LINK([#include <langinfo.h>],
-       [char* cs = nl_langinfo(CODESET);],
+       [char* cs = nl_langinfo(CODESET); (void)cs],
        am_cv_langinfo_codeset=yes,
        am_cv_langinfo_codeset=no)
        ])
@@ -92,10 +92,11 @@ define([CF_ACVERSION_COMPARE],
 [ifelse([$8], , ,[$8])],
 [ifelse([$9], , ,[$9])])])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ADD_CFLAGS version: 13 updated: 2017/02/25 18:57:40
+dnl CF_ADD_CFLAGS version: 14 updated: 2020/04/04 16:16:13
 dnl -------------
 dnl Copy non-preprocessor flags to $CFLAGS, preprocessor flags to $CPPFLAGS
-dnl The second parameter if given makes this macro verbose.
+dnl $1 = flags to add
+dnl $2 = if given makes this macro verbose.
 dnl
 dnl Put any preprocessor definitions that use quoted strings in $EXTRA_CPPFLAGS,
 dnl to simplify use of $CPPFLAGS in compiler checks, etc., that are easily
@@ -567,7 +568,7 @@ if test "$cf_have_curses_lib" = no; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CLANG_COMPILER version: 2 updated: 2013/11/19 19:23:35
+dnl CF_CLANG_COMPILER version: 4 updated: 2020/10/31 15:46:50
 dnl -----------------
 dnl Check if the given compiler is really clang.  clang's C driver defines
 dnl __GNUC__ (fooling the configure script into setting $GCC to yes) but does
@@ -586,21 +587,38 @@ ifelse([$2],,CLANG_COMPILER,[$2])=no
 if test "$ifelse([$1],,[$1],GCC)" = yes ; then
        AC_MSG_CHECKING(if this is really Clang ifelse([$1],GXX,C++,C) compiler)
        cf_save_CFLAGS="$ifelse([$3],,CFLAGS,[$3])"
-       ifelse([$3],,CFLAGS,[$3])="$ifelse([$3],,CFLAGS,[$3]) -Qunused-arguments"
        AC_TRY_COMPILE([],[
 #ifdef __clang__
 #else
 make an error
 #endif
 ],[ifelse([$2],,CLANG_COMPILER,[$2])=yes
-cf_save_CFLAGS="$cf_save_CFLAGS -Qunused-arguments"
 ],[])
        ifelse([$3],,CFLAGS,[$3])="$cf_save_CFLAGS"
        AC_MSG_RESULT($ifelse([$2],,CLANG_COMPILER,[$2]))
 fi
+
+if test "x$ifelse([$2],,CLANG_COMPILER,[$2])" = "xyes" ; then
+       for cf_clang_opt in \
+               -Qunused-arguments \
+               -Wno-error=implicit-function-declaration
+       do
+               AC_MSG_CHECKING(if option $cf_clang_opt works)
+               AC_TRY_LINK([
+                       #include <stdio.h>],[
+                       printf("hello!\n");],[
+                       cf_clang_optok=yes],[
+                       cf_clang_optok=no])
+               AC_MSG_RESULT($cf_clang_optok)
+               if test $cf_clang_optok = yes; then
+                       CF_VERBOSE(adding option $cf_clang_opt)
+                       CF_APPEND_TEXT(CFLAGS,$cf_clang_opt)
+               fi
+       done
+fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_CONST_X_STRING version: 3 updated: 2020/01/11 18:39:22
+dnl CF_CONST_X_STRING version: 4 updated: 2020/03/10 18:53:47
 dnl -----------------
 dnl The X11R4-X11R6 Xt specification uses an ambiguous String type for most
 dnl character-strings.
@@ -630,7 +648,7 @@ AC_TRY_COMPILE(
 #include <stdlib.h>
 #include <X11/Intrinsic.h>
 ],
-[String foo = malloc(1)],[
+[String foo = malloc(1); (void)foo],[
 
 AC_CACHE_CHECK(for X11/Xt const-feature,cf_cv_const_x_string,[
        AC_TRY_COMPILE(
@@ -1000,7 +1018,7 @@ fi
 
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_TERM_H version: 11 updated: 2015/04/15 19:08:48
+dnl CF_CURSES_TERM_H version: 12 updated: 2020/03/19 20:23:48
 dnl ----------------
 dnl SVr4 curses should have term.h as well (where it puts the definitions of
 dnl the low-level interface).  This may not be true in old/broken implementations,
@@ -1029,7 +1047,7 @@ do
        AC_TRY_COMPILE([
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <${cf_header}>],
-       [WINDOW *x],
+       [WINDOW *x; (void)x],
        [cf_cv_term_header=$cf_header
         break],
        [cf_cv_term_header=no])
@@ -1048,7 +1066,7 @@ case $cf_cv_term_header in
 #else
 make an error
 #endif],
-                       [WINDOW *x],
+                       [WINDOW *x; (void)x],
                        [cf_cv_term_header=$cf_header
                         break],
                        [cf_cv_term_header=no])
@@ -1070,7 +1088,7 @@ case $cf_cv_term_header in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_UNCTRL_H version: 4 updated: 2015/04/15 19:08:48
+dnl CF_CURSES_UNCTRL_H version: 5 updated: 2020/03/19 20:23:48
 dnl ------------------
 dnl Any X/Open curses implementation must have unctrl.h, but ncurses packages
 dnl may put it in a subdirectory (along with ncurses' other headers, of
@@ -1099,7 +1117,7 @@ do
        AC_TRY_COMPILE([
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <${cf_header}>],
-       [WINDOW *x],
+       [WINDOW *x; (void)x],
        [cf_cv_unctrl_header=$cf_header
         break],
        [cf_cv_unctrl_header=no])
@@ -1125,7 +1143,7 @@ case $cf_cv_unctrl_header in
 esac
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_WACS_MAP version: 6 updated: 2012/10/06 08:57:51
+dnl CF_CURSES_WACS_MAP version: 7 updated: 2020/03/19 20:23:48
 dnl ------------------
 dnl Check for likely values of wacs_map[].
 AC_DEFUN([CF_CURSES_WACS_MAP],
@@ -1139,7 +1157,7 @@ AC_CACHE_CHECK(for wide alternate character set array, cf_cv_curses_wacs_map,[
 #define _XOPEN_SOURCE_EXTENDED
 #endif
 #include <${cf_cv_ncurses_header:-curses.h}>],
-       [void *foo = &($name['k'])],
+       [void *foo = &($name['k']); (void)foo],
        [cf_cv_curses_wacs_map=$name
         break])
        done])
@@ -1147,7 +1165,7 @@ AC_CACHE_CHECK(for wide alternate character set array, cf_cv_curses_wacs_map,[
 test "$cf_cv_curses_wacs_map" != unknown && AC_DEFINE_UNQUOTED(CURSES_WACS_ARRAY,$cf_cv_curses_wacs_map,[Define to name of (n)curses wide-character array])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_CURSES_WACS_SYMBOLS version: 2 updated: 2012/10/06 08:57:51
+dnl CF_CURSES_WACS_SYMBOLS version: 3 updated: 2020/03/19 20:23:48
 dnl ----------------------
 dnl Do a check to see if the WACS_xxx constants are defined compatibly with
 dnl X/Open Curses.  In particular, NetBSD's implementation of the WACS_xxx
@@ -1166,7 +1184,7 @@ then
 #endif
 #include <${cf_cv_ncurses_header:-curses.h}>],
        [cchar_t *foo = WACS_PLUS;
-        $cf_cv_curses_wacs_map['k'] = *WACS_PLUS],
+        $cf_cv_curses_wacs_map['k'] = *WACS_PLUS; (void)foo],
        [cf_cv_curses_wacs_symbols=yes])
 else
        AC_TRY_LINK([
@@ -1174,7 +1192,7 @@ else
 #define _XOPEN_SOURCE_EXTENDED
 #endif
 #include <${cf_cv_ncurses_header:-curses.h}>],
-       [cchar_t *foo = WACS_PLUS],
+       [cchar_t *foo = WACS_PLUS; (void)foo],
        [cf_cv_curses_wacs_symbols=yes])
 fi
 ])
@@ -1306,12 +1324,21 @@ if test "x$with_string_hacks" = "xyes"; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_ENABLE_WARNINGS version: 5 updated: 2017/09/29 20:01:16
+dnl CF_ENABLE_WARNINGS version: 7 updated: 2020/08/29 09:05:21
 dnl ------------------
 dnl Configure-option to enable gcc warnings
+dnl
+dnl $1 = extra options to add, if supported
+dnl $2 = option for checking attributes.  By default, this is done when
+dnl      warnings are enabled.  For other values:
+dnl      yes: always do this, e.g., to use in generated library-headers
+dnl      no: never do this
 AC_DEFUN([CF_ENABLE_WARNINGS],[
 if ( test "$GCC" = yes || test "$GXX" = yes )
 then
+CF_FIX_WARNINGS(CFLAGS)
+CF_FIX_WARNINGS(CPPFLAGS)
+CF_FIX_WARNINGS(LDFLAGS)
 AC_MSG_CHECKING(if you want to turn on gcc warnings)
 CF_ARG_ENABLE(warnings,
        [  --enable-warnings       test: turn on gcc compiler warnings],
@@ -1320,9 +1347,10 @@ CF_ARG_ENABLE(warnings,
 AC_MSG_RESULT($with_warnings)
 if test "$with_warnings" = "yes"
 then
-       CF_GCC_ATTRIBUTES
+       ifelse($2,,[CF_GCC_ATTRIBUTES])
        CF_GCC_WARNINGS($1)
 fi
+ifelse($2,yes,[CF_GCC_ATTRIBUTES])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
@@ -1507,6 +1535,40 @@ ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_FIX_WARNINGS version: 2 updated: 2020/08/28 15:08:28
+dnl ---------------
+dnl Warning flags do not belong in CFLAGS, CPPFLAGS, etc.  Any of gcc's
+dnl "-Werror" flags can interfere with configure-checks.  Those go into
+dnl EXTRA_CFLAGS.
+dnl
+dnl $1 = variable name to repair
+define([CF_FIX_WARNINGS],[
+if ( test "$GCC" = yes || test "$GXX" = yes )
+then
+       case [$]$1 in
+       (*-Werror=*)
+               CF_VERBOSE(repairing $1: [$]$1)
+               cf_temp_flags=
+               for cf_temp_scan in [$]$1
+               do
+                       case "x$cf_temp_scan" in
+                       (x-Werror=*)
+                               CF_APPEND_TEXT(EXTRA_CFLAGS,"$cf_temp_scan")
+                               ;;
+                       (*)
+                               CF_APPEND_TEXT(cf_temp_flags,"$cf_temp_scan")
+                               ;;
+                       esac
+               done
+               $1="$cf_temp_flags"
+               CF_VERBOSE(... fixed [$]$1)
+               CF_VERBOSE(... extra $EXTRA_CFLAGS)
+               ;;
+       esac
+fi
+AC_SUBST(EXTRA_CFLAGS)
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_FUNC_CURSES_VERSION version: 7 updated: 2017/05/10 18:31:29
 dnl ----------------------
 dnl Solaris has a data item 'curses_version', which confuses AC_CHECK_FUNCS.
@@ -1557,14 +1619,14 @@ AC_CACHE_CHECK(for openpty header,cf_cv_func_openpty,[
 ])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_ATTRIBUTES version: 17 updated: 2015/04/12 15:39:00
+dnl CF_GCC_ATTRIBUTES version: 19 updated: 2020/08/29 09:05:21
 dnl -----------------
 dnl Test for availability of useful gcc __attribute__ directives to quiet
 dnl compiler warnings.  Though useful, not all are supported -- and contrary
 dnl to documentation, unrecognized directives cause older compilers to barf.
 AC_DEFUN([CF_GCC_ATTRIBUTES],
 [
-if test "$GCC" = yes
+if ( test "$GCC" = yes || test "$GXX" = yes )
 then
 cat > conftest.i <<EOF
 #ifndef GCC_PRINTF
@@ -1601,7 +1663,7 @@ cat > conftest.$ac_ext <<EOF
 extern void wow(char *,...) GCC_SCANFLIKE(1,2);
 extern void oops(char *,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
 extern void foo(void) GCC_NORETURN;
-int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { return 0; }
+int main(int argc GCC_UNUSED, char *argv[[]] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
 EOF
        cf_printf_attribute=no
        cf_scanf_attribute=no
@@ -1684,7 +1746,7 @@ CF_INTEL_COMPILER(GCC,INTEL_COMPILER,CFLAGS)
 CF_CLANG_COMPILER(GCC,CLANG_COMPILER,CFLAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_GCC_WARNINGS version: 37 updated: 2020/01/05 20:04:12
+dnl CF_GCC_WARNINGS version: 38 updated: 2020/08/28 15:08:28
 dnl ---------------
 dnl Check if the compiler supports useful warning options.  There's a few that
 dnl we don't use, simply because they're too noisy:
@@ -1727,7 +1789,7 @@ then
 
        AC_CHECKING([for $CC warning options])
        cf_save_CFLAGS="$CFLAGS"
-       EXTRA_CFLAGS="-Wall"
+       EXTRA_CFLAGS="$EXTRA_CFLAGS -Wall"
        for cf_opt in \
                wd1419 \
                wd1683 \
@@ -1750,7 +1812,6 @@ elif test "$GCC" = yes && test "$GCC_VERSION" != "unknown"
 then
        AC_CHECKING([for $CC warning options])
        cf_save_CFLAGS="$CFLAGS"
-       EXTRA_CFLAGS=
        cf_warn_CONST=""
        test "$with_ext_const" = yes && cf_warn_CONST="Wwrite-strings"
        cf_gcc_warnings="Wignored-qualifiers Wlogical-op Wvarargs"
@@ -2278,7 +2339,7 @@ ifelse($1,,[
 fi
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_MIXEDCASE_FILENAMES version: 7 updated: 2015/04/12 15:39:00
+dnl CF_MIXEDCASE_FILENAMES version: 8 updated: 2020/11/14 10:12:15
 dnl ----------------------
 dnl Check if the file-system supports mixed-case filenames.  If we're able to
 dnl create a lowercase name and see it as uppercase, it doesn't support that.
@@ -2287,7 +2348,7 @@ AC_DEFUN([CF_MIXEDCASE_FILENAMES],
 AC_CACHE_CHECK(if filesystem supports mixed-case filenames,cf_cv_mixedcase,[
 if test "$cross_compiling" = yes ; then
        case $target_alias in
-       (*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*)
+       (*-os2-emx*|*-msdosdjgpp*|*-cygwin*|*-msys*|*-mingw*|*-uwin*|darwin*)
                cf_cv_mixedcase=no
                ;;
        (*)
@@ -2349,7 +2410,7 @@ printf("old\n");
        ,[$1=no])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_NCURSES_CONFIG version: 21 updated: 2018/06/20 20:23:13
+dnl CF_NCURSES_CONFIG version: 23 updated: 2020/02/27 05:21:59
 dnl -----------------
 dnl Tie together the configure-script macros for ncurses, preferring these in
 dnl order:
@@ -2371,11 +2432,47 @@ if test "x${PKG_CONFIG:=none}" != xnone; then
                AC_MSG_CHECKING(if the $cf_ncuconfig_root package files work)
                cf_have_ncuconfig=unknown
 
+               cf_save_CFLAGS="$CFLAGS"
                cf_save_CPPFLAGS="$CPPFLAGS"
                cf_save_LIBS="$LIBS"
 
-               CF_ADD_CFLAGS(`$PKG_CONFIG --cflags $cf_ncuconfig_root`)
-               CF_ADD_LIBS(`$PKG_CONFIG --libs $cf_ncuconfig_root`)
+               cf_pkg_cflags=`$PKG_CONFIG --cflags $cf_ncuconfig_root`
+               cf_pkg_libs=`$PKG_CONFIG --libs $cf_ncuconfig_root`
+
+               # while -W for passing linker flags is prevalent, it is not "standard". 
+               # At least one wrapper for c89/c99 (in Apple's xcode) has its own
+               # incompatible _and_ non-standard -W option which gives an error.  Work
+               # around that pitfall.
+               case "x${CC}@@${cf_pkg_libs}@${cf_pkg_cflags}" in
+               (x*c[[89]]9@@*-W*)
+                       CF_ADD_CFLAGS($cf_pkg_cflags)
+                       CF_ADD_LIBS($cf_pkg_libs)
+
+                       AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
+                               [initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
+                               [AC_TRY_RUN([#include <${cf_cv_ncurses_header:-curses.h}>
+                                       int main(void)
+                                       { char *xx = curses_version(); return (xx == 0); }],
+                                       [cf_test_ncuconfig=yes],
+                                       [cf_test_ncuconfig=no],
+                                       [cf_test_ncuconfig=maybe])],
+                               [cf_test_ncuconfig=no])
+
+                       CFLAGS="$cf_save_CFLAGS"
+                       CPPFLAGS="$cf_save_CPPFLAGS"
+                       LIBS="$cf_save_LIBS"
+
+                       if test "x$cf_test_ncuconfig" != xyes; then
+                               cf_temp=`echo "x$cf_pkg_cflags" | sed -e s/^x// -e 's/-W[[^     ]]*//g'`
+                               cf_pkg_cflags="$cf_temp"
+                               cf_temp=`echo "x$cf_pkg_libs" | sed -e s/^x// -e 's/-W[[^       ]]*//g'`
+                               cf_pkg_libs="$cf_temp"
+                       fi
+                       ;;
+               esac
+
+               CF_ADD_CFLAGS($cf_pkg_cflags)
+               CF_ADD_LIBS($cf_pkg_libs)
 
                AC_TRY_LINK([#include <${cf_cv_ncurses_header:-curses.h}>],
                        [initscr(); mousemask(0,0); tgoto((char *)0, 0, 0);],
@@ -3290,7 +3387,7 @@ do
 done
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_SIGWINCH version: 2 updated: 2019/03/23 19:54:44
+dnl CF_SIGWINCH version: 3 updated: 2020/03/10 18:53:47
 dnl -----------
 dnl Use this macro after CF_XOPEN_SOURCE, but do not require it (not all
 dnl programs need this test).
@@ -3305,7 +3402,7 @@ AC_CACHE_CHECK(if SIGWINCH is defined,cf_cv_define_sigwinch,[
        AC_TRY_COMPILE([
 #include <sys/types.h>
 #include <sys/signal.h>
-],[int x = SIGWINCH],
+],[int x = SIGWINCH; (void)x],
        [cf_cv_define_sigwinch=yes],
        [AC_TRY_COMPILE([
 #undef _XOPEN_SOURCE
@@ -3313,7 +3410,7 @@ AC_CACHE_CHECK(if SIGWINCH is defined,cf_cv_define_sigwinch,[
 #undef _POSIX_C_SOURCE
 #include <sys/types.h>
 #include <sys/signal.h>
-],[int x = SIGWINCH],
+],[int x = SIGWINCH; (void)x],
        [cf_cv_define_sigwinch=maybe],
        [cf_cv_define_sigwinch=no])
 ])
@@ -3335,7 +3432,7 @@ do
 #if SIGWINCH != $cf_sigwinch
 make an error
 #endif
-int x = SIGWINCH],
+int x = SIGWINCH; (void)x],
        [cf_cv_fixup_sigwinch=$cf_sigwinch
         break])
 
@@ -3349,7 +3446,7 @@ done
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_SIG_ATOMIC_T version: 4 updated: 2020/01/18 12:30:44
+dnl CF_SIG_ATOMIC_T version: 5 updated: 2020/03/10 18:53:47
 dnl ---------------
 dnl signal handler, but there are some gcc dependencies in that recommendation.
 dnl Try anyway.
@@ -3371,6 +3468,7 @@ extern $cf_type x;
 $cf_type x;
 static void handler(int sig)
 {
+       (void)sig;
        x = 5;
 }],
                [signal(SIGINT, handler);
@@ -3431,7 +3529,7 @@ AC_MSG_RESULT($cf_cv_sys_time_select)
 test "$cf_cv_sys_time_select" = yes && AC_DEFINE(HAVE_SYS_TIME_SELECT,1,[Define to 1 if we can include <sys/time.h> with <sys/select.h>])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_TERM_HEADER version: 4 updated: 2015/04/15 19:08:48
+dnl CF_TERM_HEADER version: 5 updated: 2020/03/19 20:23:48
 dnl --------------
 dnl Look for term.h, which is part of X/Open curses.  It defines the interface
 dnl to terminfo database.  Usually it is in the same include-path as curses.h,
@@ -3452,7 +3550,7 @@ do
 AC_TRY_COMPILE([#include <stdio.h>
 #include <${cf_cv_ncurses_header:-curses.h}>
 #include <$cf_test>
-],[int x = auto_left_margin],[
+],[int x = auto_left_margin; (void)x],[
        cf_cv_term_header="$cf_test"],[
        cf_cv_term_header=unknown
        ])
@@ -3760,6 +3858,35 @@ if test "$with_dmalloc" = yes ; then
 fi
 ])dnl
 dnl ---------------------------------------------------------------------------
+dnl CF_WITH_LIB_BASENAME version: 1 updated: 2020/03/07 20:05:14
+dnl --------------------
+dnl Allow for overriding the basename of a library, i.e., the part to which
+dnl prefixes/suffixes are attached.
+dnl
+dnl $1 = variable to set
+dnl $2 = option name
+dnl $3 = default basename for library, if omitted use $2
+AC_DEFUN([CF_WITH_LIB_BASENAME],
+[
+AC_MSG_CHECKING(for desired basename for $2 library)
+AC_ARG_WITH($2-libname,
+       [  --with-$2-libname=XXX override ifelse($3,,$2,$3) basename of library],
+       [with_lib_basename=$withval],
+       [with_lib_basename=ifelse($3,,$2,$3)])
+$1="$with_lib_basename"
+
+case "x[$]$1" in
+(x|xno|xnone|xyes)
+       $1=ifelse($3,,$2,$3)
+       ;;
+(*)
+       ;;
+esac
+
+AC_MSG_RESULT([$]$1)
+AC_SUBST($1)
+])dnl
+dnl ---------------------------------------------------------------------------
 dnl CF_WITH_NCURSES_ETC version: 5 updated: 2016/02/20 19:23:20
 dnl -------------------
 dnl Use this macro for programs which use any variant of "curses", e.g.,
@@ -3821,6 +3948,23 @@ esac
 
 CF_NCURSES_PTHREADS($cf_cv_screen)
 
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_WITH_SCREEN_PDCURSES version: 1 updated: 2020/08/28 16:56:27
+dnl -----------------------
+dnl Call this macro before CF_ENABLE_WARNINGS for configure scripts which use
+dnl the "--with-screen=pdcurses" selection.  Doing that allows the configure
+dnl script to search for the X11/Xt header files to declare (or not) the
+dnl symbol needed to enable "const" in those header files.  If that configure
+dnl option is not used, then those checks are unnecessary.
+AC_DEFUN([CF_WITH_SCREEN_PDCURSES],[
+AC_PROVIDE([AC_PATH_XTRA])
+AC_PROVIDE([AC_PATH_X])
+if test -n "$with_screen" && test "x$with_screen" = "xpdcurses"
+then
+       AC_PATH_X
+       AC_PATH_XTRA
+fi
 ])dnl
 dnl ---------------------------------------------------------------------------
 dnl CF_WITH_VALGRIND version: 1 updated: 2006/12/14 18:00:21
@@ -3917,7 +4061,7 @@ fi
 AC_SUBST(no_x11_rgb)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_XOPEN_CURSES version: 14 updated: 2018/06/20 20:23:13
+dnl CF_XOPEN_CURSES version: 15 updated: 2020/03/19 20:23:48
 dnl ---------------
 dnl Test if we should define X/Open source for curses, needed on Digital Unix
 dnl 4.x, to see the extended functions, but breaks on IRIX 6.x.
@@ -3943,7 +4087,14 @@ AC_TRY_LINK([
 #endif
        long x = winnstr(stdscr, "", 0);
        int x1, y1;
-       getbegyx(stdscr, y1, x1)],
+#ifdef NCURSES_VERSION
+       (void)check2;
+#endif
+       getbegyx(stdscr, y1, x1);
+       (void)x;
+       (void)y1;
+       (void)x1;
+       ],
        [cf_cv_need_xopen_extension=none],
        [
        for cf_try_xopen_extension in _XOPEN_SOURCE_EXTENDED NCURSES_WIDECHAR
@@ -3958,7 +4109,14 @@ AC_TRY_LINK([
 #endif
                long x = winnstr(stdscr, "", 0);
                int x1, y1;
-               getbegyx(stdscr, y1, x1)],
+               getbegyx(stdscr, y1, x1);
+#ifdef NCURSES_VERSION
+               (void)check2;
+#endif
+               (void)x;
+               (void)y1;
+               (void)x1;
+               ],
                [cf_cv_need_xopen_extension=$cf_try_xopen_extension; break])
        done
        ])
@@ -4103,7 +4261,7 @@ fi
 fi # cf_cv_posix_visible
 ])
 dnl ---------------------------------------------------------------------------
-dnl CF_X_ATHENA version: 23 updated: 2015/04/12 15:39:00
+dnl CF_X_ATHENA version: 24 updated: 2020/03/10 18:53:47
 dnl -----------
 dnl Check for Xaw (Athena) libraries
 dnl
@@ -4179,7 +4337,8 @@ AC_CACHE_CHECK(for usable $cf_x_athena/Xmu package,cf_cv_xaw_compat,[
 AC_TRY_LINK([
 #include <X11/Xmu/CharSet.h>
 ],[
-int check = XmuCompareISOLatin1("big", "small")
+int check = XmuCompareISOLatin1("big", "small");
+(void)check;
 ],[cf_cv_xaw_compat=yes],[cf_cv_xaw_compat=no])])
 
                        if test "$cf_cv_xaw_compat" = no
@@ -4331,7 +4490,7 @@ CF_TRY_PKG_CONFIG(Xext,,[
                [CF_ADD_LIB(Xext)])])
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_X_TOOLKIT version: 24 updated: 2019/03/23 19:54:44
+dnl CF_X_TOOLKIT version: 25 updated: 2020/03/10 17:26:15
 dnl ------------
 dnl Check for X Toolkit libraries
 AC_DEFUN([CF_X_TOOLKIT],
@@ -4351,6 +4510,8 @@ then
        CF_TRY_PKG_CONFIG(ice,,[AC_MSG_WARN(unable to find ICE library)])
        CF_TRY_PKG_CONFIG(sm,,[AC_MSG_WARN(unable to find SM library)])
        CF_TRY_PKG_CONFIG(xt,,[AC_MSG_WARN(unable to find Xt library)])
+else
+       LIBS="$X_PRE_LIBS $LIBS $X_EXTRA_LIBS"
 fi
 
 cf_have_X_LIBS=no
@@ -4383,7 +4544,7 @@ AC_TRY_LINK([
 AC_CACHE_CHECK(for usable X Toolkit package,cf_cv_xt_ice_compat,[
 AC_TRY_LINK([
 #include <X11/Shell.h>
-],[int num = IceConnectionNumber(0)
+],[int num = IceConnectionNumber(0); (void) num
 ],[cf_cv_xt_ice_compat=yes],[cf_cv_xt_ice_compat=no])])
 
        if test "$cf_cv_xt_ice_compat" = no
@@ -4413,15 +4574,13 @@ AC_TRY_LINK([
 
        AC_CHECK_FUNC(XOpenDisplay,,[
        AC_CHECK_LIB(X11,XOpenDisplay,
-               [CF_ADD_LIB(X11)],,
-               [$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
+               [CF_ADD_LIB(X11)])])
 
        AC_CHECK_FUNC(XtAppInitialize,,[
        AC_CHECK_LIB(Xt, XtAppInitialize,
                [AC_DEFINE(HAVE_LIBXT,1,[Define to 1 if we can compile with the Xt library])
                 cf_have_X_LIBS=Xt
-                LIBS="-lXt $X_PRE_LIBS $LIBS $X_EXTRA_LIBS"],,
-               [$X_PRE_LIBS $LIBS $X_EXTRA_LIBS])])
+                LIBS="-lXt $LIBS"])])
 ])
 
 if test $cf_have_X_LIBS = no ; then