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# serial 3
# See if we need to provide symlink replacement.
dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Written by Eric Blake.
AC_DEFUN([gl_FUNC_SYMLINK],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([symlink])
dnl The best we can do on mingw is provide a dummy that always fails, so
dnl that compilation can proceed with fewer ifdefs. On FreeBSD 7.2, AIX 7.1,
dnl and Solaris 9, we want to fix a bug with trailing slash handling.
if test $ac_cv_func_symlink = no; then
HAVE_SYMLINK=0
AC_LIBOBJ([symlink])
else
AC_CACHE_CHECK([whether symlink handles trailing slash correctly],
[gl_cv_func_symlink_works],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <unistd.h>
]], [[if (!symlink ("a", "conftest.link/")) return 1;
if (symlink ("conftest.f", "conftest.lnk2")) return 2;
if (!symlink ("a", "conftest.lnk2/")) return 3;]])],
[gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no],
[gl_cv_func_symlink_works="guessing no"])
rm -f conftest.f conftest.link conftest.lnk2])
if test "$gl_cv_func_symlink_works" != yes; then
REPLACE_SYMLINK=1
AC_LIBOBJ([symlink])
fi
fi
])
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