+dnl CF_FIND_LINKAGE version: 21 updated: 2018/06/20 20:23:13
+dnl ---------------
+dnl Find a library (specifically the linkage used in the code fragment),
+dnl searching for it if it is not already in the library path.
+dnl See also CF_ADD_SEARCHPATH.
+dnl
+dnl Parameters (4-on are optional):
+dnl $1 = headers for library entrypoint
+dnl $2 = code fragment for library entrypoint
+dnl $3 = the library name without the "-l" option or ".so" suffix.
+dnl $4 = action to perform if successful (default: update CPPFLAGS, etc)
+dnl $5 = action to perform if not successful
+dnl $6 = module name, if not the same as the library name
+dnl $7 = extra libraries
+dnl
+dnl Sets these variables:
+dnl $cf_cv_find_linkage_$3 - yes/no according to whether linkage is found
+dnl $cf_cv_header_path_$3 - include-directory if needed
+dnl $cf_cv_library_path_$3 - library-directory if needed
+dnl $cf_cv_library_file_$3 - library-file if needed, e.g., -l$3
+AC_DEFUN([CF_FIND_LINKAGE],[
+
+# If the linkage is not already in the $CPPFLAGS/$LDFLAGS configuration, these
+# will be set on completion of the AC_TRY_LINK below.
+cf_cv_header_path_$3=
+cf_cv_library_path_$3=
+
+CF_MSG_LOG([Starting [FIND_LINKAGE]($3,$6)])
+
+cf_save_LIBS="$LIBS"
+
+AC_TRY_LINK([$1],[$2],[
+ cf_cv_find_linkage_$3=yes
+ cf_cv_header_path_$3=/usr/include
+ cf_cv_library_path_$3=/usr/lib
+],[
+
+LIBS="-l$3 $7 $cf_save_LIBS"
+
+AC_TRY_LINK([$1],[$2],[
+ cf_cv_find_linkage_$3=yes
+ cf_cv_header_path_$3=/usr/include
+ cf_cv_library_path_$3=/usr/lib
+ cf_cv_library_file_$3="-l$3"
+],[
+ cf_cv_find_linkage_$3=no
+ LIBS="$cf_save_LIBS"
+
+ CF_VERBOSE(find linkage for $3 library)
+ CF_MSG_LOG([Searching for headers in [FIND_LINKAGE]($3,$6)])
+
+ cf_save_CPPFLAGS="$CPPFLAGS"
+ cf_test_CPPFLAGS="$CPPFLAGS"
+
+ CF_HEADER_PATH(cf_search,ifelse([$6],,[$3],[$6]))
+ for cf_cv_header_path_$3 in $cf_search
+ do
+ if test -d $cf_cv_header_path_$3 ; then
+ CF_VERBOSE(... testing $cf_cv_header_path_$3)
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ CF_APPEND_TEXT(CPPFLAGS,-I$cf_cv_header_path_$3)
+ AC_TRY_COMPILE([$1],[$2],[
+ CF_VERBOSE(... found $3 headers in $cf_cv_header_path_$3)
+ cf_cv_find_linkage_$3=maybe
+ cf_test_CPPFLAGS="$CPPFLAGS"
+ break],[
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ ])
+ fi
+ done
+
+ if test "$cf_cv_find_linkage_$3" = maybe ; then
+
+ CF_MSG_LOG([Searching for $3 library in [FIND_LINKAGE]($3,$6)])
+
+ cf_save_LIBS="$LIBS"
+ cf_save_LDFLAGS="$LDFLAGS"
+
+ ifelse([$6],,,[
+ CPPFLAGS="$cf_test_CPPFLAGS"
+ LIBS="-l$3 $7 $cf_save_LIBS"
+ AC_TRY_LINK([$1],[$2],[
+ CF_VERBOSE(... found $3 library in system)
+ cf_cv_find_linkage_$3=yes])
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ LIBS="$cf_save_LIBS"
+ ])
+
+ if test "$cf_cv_find_linkage_$3" != yes ; then
+ CF_LIBRARY_PATH(cf_search,$3)
+ for cf_cv_library_path_$3 in $cf_search
+ do
+ if test -d $cf_cv_library_path_$3 ; then
+ CF_VERBOSE(... testing $cf_cv_library_path_$3)
+ CPPFLAGS="$cf_test_CPPFLAGS"
+ LIBS="-l$3 $7 $cf_save_LIBS"
+ LDFLAGS="$cf_save_LDFLAGS -L$cf_cv_library_path_$3"
+ AC_TRY_LINK([$1],[$2],[
+ CF_VERBOSE(... found $3 library in $cf_cv_library_path_$3)
+ cf_cv_find_linkage_$3=yes
+ cf_cv_library_file_$3="-l$3"
+ break],[
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ LIBS="$cf_save_LIBS"
+ LDFLAGS="$cf_save_LDFLAGS"
+ ])
+ fi
+ done
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ LDFLAGS="$cf_save_LDFLAGS"
+ fi
+
+ else
+ cf_cv_find_linkage_$3=no
+ fi
+ ],$7)
+])
+
+LIBS="$cf_save_LIBS"
+
+if test "$cf_cv_find_linkage_$3" = yes ; then
+ifelse([$4],,[
+ CF_ADD_INCDIR($cf_cv_header_path_$3)
+ CF_ADD_LIBDIR($cf_cv_library_path_$3)
+ CF_ADD_LIB($3)
+],[$4])
+else
+ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FIND_SUB_INCDIR version: 2 updated: 2015/04/17 21:13:04
+dnl ------------------
+dnl Find an include-directory with the given leaf-name. This is useful for
+dnl example with FreeBSD ports, which use this convention to distinguish
+dnl different versions of the same port.
+AC_DEFUN([CF_FIND_SUB_INCDIR],[
+ CF_SUBDIR_PATH(cf_search,$1,include)
+ for cf_item in $cf_search
+ do
+ case $cf_item in
+ (*/$1)
+ CF_ADD_INCDIR($cf_item)
+ ;;
+ esac
+ done
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FIND_SUB_LIBDIR version: 2 updated: 2015/04/17 21:13:04
+dnl ------------------
+dnl Find a library-directory with the given leaf-name. This is useful for
+dnl example with FreeBSD ports, which use this convention to distinguish
+dnl different versions of the same port.
+AC_DEFUN([CF_FIND_SUB_LIBDIR],[
+ CF_SUBDIR_PATH(cf_search,$1,lib)
+ for cf_item in $cf_search
+ do
+ case $cf_item in
+ (*/$1)
+ CF_ADD_LIBDIR($cf_item)
+ ;;
+ esac
+ done
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FIXUP_ADAFLAGS version: 2 updated: 2015/04/17 21:13:04
+dnl -----------------
+dnl make ADAFLAGS consistent with CFLAGS
+AC_DEFUN([CF_FIXUP_ADAFLAGS],[
+ AC_MSG_CHECKING(optimization options for ADAFLAGS)
+ case "$CFLAGS" in
+ (*-g*)
+ CF_ADD_ADAFLAGS(-g)
+ ;;
+ esac
+ case "$CFLAGS" in
+ (*-O*)
+ cf_O_flag=`echo "$CFLAGS" |sed -e 's/^.*-O/-O/' -e 's/[[ ]].*//'`
+ CF_ADD_ADAFLAGS($cf_O_flag)
+ ;;
+ esac
+ AC_MSG_RESULT($ADAFLAGS)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FOPEN_BIN_R version: 1 updated: 2019/03/30 17:52:21
+dnl --------------
+dnl Check if fopen works when the "b" (binary) flag is added to the mode
+dnl parameter. POSIX ignores the "b", which c89 specified. Some very old
+dnl systems do not accept it.
+AC_DEFUN([CF_FOPEN_BIN_R],[
+AC_CACHE_CHECK(if fopen accepts explicit binary mode,cf_cv_fopen_bin_r,[
+ AC_TRY_RUN([
+#include <stdio.h>
+int main(void) {
+ FILE *fp = fopen("conftest.tmp", "wb");
+ int rc = 0;
+ if (fp != 0) {
+ int p, q;
+ for (p = 0; p < 256; ++p) {
+ fputc(p, fp);
+ }
+ fclose(fp);
+ fp = fopen("conftest.tmp", "rb");
+ if (fp != 0) {
+ for (p = 0; p < 256; ++p) {
+ q = fgetc(fp);
+ if (q != p) {
+ rc = 1;
+ break;
+ }
+ }
+ } else {
+ rc = 1;
+ }
+ } else {
+ rc = 1;
+ }
+ ${cf_cv_main_return:-return} (rc);
+}
+],
+ [cf_cv_fopen_bin_r=yes],
+ [cf_cv_fopen_bin_r=no],
+ [cf_cv_fopen_bin_r=unknown])
+])
+test "x$cf_cv_fopen_bin_r" != xno && AC_DEFINE(USE_FOPEN_BIN_R)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FORGET_TOOL version: 1 updated: 2013/04/06 18:03:09
+dnl --------------
+dnl Forget that we saw the given tool.
+AC_DEFUN([CF_FORGET_TOOL],[
+unset ac_cv_prog_ac_ct_$1
+unset ac_ct_$1
+unset $1
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FUNC_DLSYM version: 4 updated: 2015/09/12 14:46:44