X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Flink.m4;h=0ca85d3a8bed25fa4c2bf6133b1ba5dca59f7255;hb=3ac9b4577c78342bdd022b31cf56de2b12f7297b;hp=a212ee26605eb8878f9e18e51f97b893b1b5ba94;hpb=8bfee8687b37d280d51793774be0fa79070eafa1;p=gnulib.git

diff --git a/m4/link.m4 b/m4/link.m4
index a212ee266..0ca85d3a8 100644
--- a/m4/link.m4
+++ b/m4/link.m4
@@ -1,5 +1,5 @@
-# link.m4 serial 3
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# link.m4 serial 4
+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.
@@ -15,13 +15,21 @@ AC_DEFUN([gl_FUNC_LINK],
     AC_CACHE_CHECK([whether link handles trailing slash correctly],
       [gl_cv_func_link_works],
       [touch conftest.a
+       # Assume that if we have lstat, we can also check symlinks.
+       if test $ac_cv_func_lstat = yes; then
+         ln -s conftest.a conftest.lnk
+       fi
        AC_RUN_IFELSE(
          [AC_LANG_PROGRAM(
            [[#include <unistd.h>
-]], [[return !link ("conftest.a", "conftest.b/");]])],
+]], [[if (!link ("conftest.a", "conftest.b/")) return 1;
+#if HAVE_LSTAT
+      if (!link ("conftest.lnk/", "conftest.b")) return 2;
+#endif
+           ]])],
          [gl_cv_func_link_works=yes], [gl_cv_func_link_works=no],
          [gl_cv_func_link_works="guessing no"])
-       rm -f conftest.a conftest.b])
+       rm -f conftest.a conftest.b conftest.lnk])
     if test "$gl_cv_func_link_works" != yes; then
       REPLACE_LINK=1
       AC_LIBOBJ([link])