* gcov.c (canonicalize_name): Protect use of S_ISLNK.

From-SVN: r181367

gcc/ChangeLog

+2011-11-14  Nathan Sidwell  <nathan@acm.org>
+
+	* gcov.c (canonicalize_name): Protect use of S_ISLNK.
+
 2011-11-14  Jan Hubicka  <jh@suse.cz>
 
 	* config/i386/i386.c (core cost model): Correct pasto.

gcc/gcov.c

@@ -1688,10 +1688,15 @@ canonicalize_name (const char *name)
 	{
 	  /* '..', we can only elide it and the previous directory, if
 	     we're not a symlink.  */
-	  struct stat buf;
-	  
+	  struct stat ATTRIBUTE_UNUSED buf;
+
 	  *ptr = 0;
-	  if (dd_base == ptr || stat (result, &buf) || S_ISLNK (buf.st_mode))
+	  if (dd_base == ptr
+#if defined (S_ISLNK)
+	      /* S_ISLNK is not POSIX.1-1996.  */
+	      || stat (result, &buf) || S_ISLNK (buf.st_mode)
+#endif
+	      )
 	    {
 	      /* Cannot elide, or unreadable or a symlink.  */
 	      dd_base = ptr + 2 + slash;