unistr/u*-next: Add missing dependencies.

[gnulib.git] / m4 / unlink.m4

diff --git a/m4/unlink.m4 b/m4/unlink.m4
index 626c3ad..c01d848 100644 (file)
--- a/m4/unlink.m4
+++ b/m4/unlink.m4
@@ -1,5 +1,5 @@
-# unlink.m4 serial 1
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# unlink.m4 serial 3
+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.
@@ -8,18 +8,26 @@ AC_DEFUN([gl_FUNC_UNLINK],
 [
   AC_REQUIRE([gl_AC_DOS])
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
-  dnl Detect Solaris 9 bug.
+  dnl Detect Solaris 9 and FreeBSD 7.2 bug.
   AC_CACHE_CHECK([whether unlink honors trailing slashes],
     [gl_cv_func_unlink_works],
     [touch conftest.file
+     # Assume that if we have lstat, we can also check symlinks.
+     if test $ac_cv_func_lstat = yes; then
+       ln -s conftest.file conftest.lnk
+     fi
      AC_RUN_IFELSE(
        [AC_LANG_PROGRAM(
-         [[#include <stdio.h>
+         [[#include <unistd.h>
            #include <errno.h>
-]], [[return !unlink ("conftest.file/") || errno != ENOTDIR;]])],
+]], [[if (!unlink ("conftest.file/") || errno != ENOTDIR) return 1;
+#if HAVE_LSTAT
+      if (!unlink ("conftest.lnk/") || errno != ENOTDIR) return 2;
+#endif
+      ]])],
       [gl_cv_func_unlink_works=yes], [gl_cv_func_unlink_works=no],
       [gl_cv_func_unlink_works="guessing no"])
-     rm -f conftest.file])
+     rm -f conftest.file conftest.lnk])
   if test x"$gl_cv_func_unlink_works" != xyes; then
     REPLACE_UNLINK=1
     AC_LIBOBJ([unlink])