-dnl CF_LINK_FUNCS version: 7 updated: 2006/12/16 12:33:30
-dnl -------------
-dnl Most Unix systems have both link and symlink, a few don't have symlink.
-dnl A few non-Unix systems implement symlink, but not link.
-dnl A few non-systems implement neither (or have nonfunctional versions).
-AC_DEFUN([CF_LINK_FUNCS],
-[
-AC_CHECK_FUNCS( \
- remove \
- unlink )
-
-if test "$cross_compiling" = yes ; then
- AC_CHECK_FUNCS( \
- link \
- symlink )
-else
- AC_CACHE_CHECK(if link/symlink functions work,cf_cv_link_funcs,[
- cf_cv_link_funcs=
- for cf_func in link symlink ; do
- AC_TRY_RUN([
-#include <sys/types.h>
-#include <sys/stat.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-int main()
-{
- int fail = 0;
- char *src = "config.log";
- char *dst = "conftest.chk";
- struct stat src_sb;
- struct stat dst_sb;
-
- stat(src, &src_sb);
- fail = ($cf_func("config.log", "conftest.chk") < 0)
- || (stat(dst, &dst_sb) < 0)
- || (dst_sb.st_mtime != src_sb.st_mtime);
-#ifdef HAVE_UNLINK
- unlink(dst);
-#else
- remove(dst);
-#endif
- ${cf_cv_main_return:-return} (fail);
-}
- ],[
- cf_cv_link_funcs="$cf_cv_link_funcs $cf_func"
- eval 'ac_cv_func_'$cf_func'=yes'],[
- eval 'ac_cv_func_'$cf_func'=no'],[
- eval 'ac_cv_func_'$cf_func'=error'])
- done
- test -z "$cf_cv_link_funcs" && cf_cv_link_funcs=no
- ])
- test "$ac_cv_func_link" = yes && AC_DEFINE(HAVE_LINK)
- test "$ac_cv_func_symlink" = yes && AC_DEFINE(HAVE_SYMLINK)
-fi
-])dnl
-dnl ---------------------------------------------------------------------------
-dnl CF_MAIN_RETURN version: 1 updated: 2006/12/10 09:51:54
-dnl --------------
-dnl Check if a return from main to the shell actually returns the same exit
-dnl code. This is true for almost any POSIX environment.
-dnl
-dnl Some very old environments did not flush stdout, etc., on an exit. That
-dnl would be a useful case to test for also.
-AC_DEFUN([CF_MAIN_RETURN],
-[
-cf_cv_main_return=return
-])dnl
-dnl ---------------------------------------------------------------------------
-dnl CF_MAKEFLAGS version: 14 updated: 2011/03/31 19:29:46