-# link.m4 serial 5
-dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
+# link.m4 serial 8
+dnl Copyright (C) 2009-2013 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.
AC_DEFUN([gl_FUNC_LINK],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS_ONCE([link])
if test $ac_cv_func_link = no; then
HAVE_LINK=0
- AC_LIBOBJ([link])
else
- AC_CACHE_CHECK([whether link handles trailing slash correctly],
+ AC_CACHE_CHECK([whether link obeys POSIX],
[gl_cv_func_link_works],
[touch conftest.a
# Assume that if we have lstat, we can also check symlinks.
#if HAVE_LSTAT
if (!link ("conftest.lnk/", "conftest.b"))
result |= 2;
+ if (rename ("conftest.a", "conftest.b"))
+ result |= 4;
+ if (!link ("conftest.b", "conftest.lnk"))
+ result |= 8;
#endif
return result;
]])],
[gl_cv_func_link_works=yes], [gl_cv_func_link_works=no],
- [gl_cv_func_link_works="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_link_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_link_works="guessing no" ;;
+ esac
+ ])
rm -f conftest.a conftest.b conftest.lnk])
- if test "$gl_cv_func_link_works" != yes; then
- REPLACE_LINK=1
- AC_LIBOBJ([link])
- fi
+ case "$gl_cv_func_link_works" in
+ *yes) ;;
+ *)
+ REPLACE_LINK=1
+ ;;
+ esac
fi
])