mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-25 07:28:20 +00:00
59 lines
2.2 KiB
Plaintext
59 lines
2.2 KiB
Plaintext
# symlink.m4
|
|
# serial 10
|
|
dnl Copyright (C) 2009-2024 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.
|
|
|
|
# See if we need to provide symlink replacement.
|
|
|
|
# Written by Eric Blake.
|
|
|
|
AC_DEFUN([gl_FUNC_SYMLINK],
|
|
[
|
|
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
|
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
|
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 $ac_cv_func_symlink = no; then
|
|
HAVE_SYMLINK=0
|
|
else
|
|
AC_CACHE_CHECK([whether symlink handles trailing slash correctly],
|
|
[gl_cv_func_symlink_works],
|
|
[AC_RUN_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <unistd.h>
|
|
]],
|
|
[[int result = 0;
|
|
if (!symlink ("a", "conftest.link/"))
|
|
result |= 1;
|
|
if (symlink ("conftest.f", "conftest.lnk2"))
|
|
result |= 2;
|
|
else if (!symlink ("a", "conftest.lnk2/"))
|
|
result |= 4;
|
|
return result;
|
|
]])],
|
|
[gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no],
|
|
[case "$host_os" in
|
|
# Guess yes on Linux systems.
|
|
linux-* | linux) gl_cv_func_symlink_works="guessing yes" ;;
|
|
# Guess yes on systems that emulate the Linux system calls.
|
|
midipix*) gl_cv_func_symlink_works="guessing yes" ;;
|
|
# Guess yes on glibc systems.
|
|
*-gnu* | gnu*) gl_cv_func_symlink_works="guessing yes" ;;
|
|
# If we don't know, obey --enable-cross-guesses.
|
|
*) gl_cv_func_symlink_works="$gl_cross_guess_normal" ;;
|
|
esac
|
|
])
|
|
rm -f conftest.f conftest.link conftest.lnk2])
|
|
case "$gl_cv_func_symlink_works" in
|
|
*yes) ;;
|
|
*)
|
|
REPLACE_SYMLINK=1
|
|
;;
|
|
esac
|
|
fi
|
|
])
|