Update Gnulib to v0.0-7695-g26c0590.

[bpt/guile.git] / m4 / fcntl-o.m4

diff --git a/m4/fcntl-o.m4 b/m4/fcntl-o.m4
index 9862741..740e78b 100644 (file)
--- a/m4/fcntl-o.m4
+++ b/m4/fcntl-o.m4
@@ -50,7 +50,18 @@ AC_DEFUN([gl_FCNTL_O_FLAGS],
             #if HAVE_SYMLINK
             {
               static char const sym[] = "conftest.sym";
-              if (symlink (".", sym) != 0)
+              if (symlink ("/dev/null", sym) != 0)
+                result |= 2;
+              else
+                {
+                  int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
+                  if (fd >= 0)
+                    {
+                      close (fd);
+                      result |= 4;
+                    }
+                }
+              if (unlink (sym) != 0 || symlink (".", sym) != 0)
                 result |= 2;
               else
                 {