gcc.c (set_multilib_dir): Don't access *end.

	* gcc.c (set_multilib_dir): Don't access *end.
	Use memcpy instead of strncpy.  Don't write beyond malloced buffer.
	(print_multilib_info): Don't show paths starting with ".:".
	* genmultilib: Add new option, "yes" if multilibs are enabled.
	Update comments.  If multilibs not enabled, print .:${osdirout}
	for each directory.  If multilibs are enabled, always print
	${dirout}:${osdirout}, even if the two are the same.
	* Makefile.in (s-mlib): Pass @enable_multilib@ to genmultilib.
	Pass all MULTILIB_* variables to genmultilib even if
	--disable-multilib but MULTILIB_OSDIRNAMES is not empty.

From-SVN: r57846

1 files changed, 9 insertions, 3 deletions

diff --git a/gcc/gcc.c b/gcc/gcc.c
index b9794fe..167dde7 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -6926,11 +6926,11 @@ set_multilib_dir ()
 
 	  while (q < end && *q != ':')
 	    q++;
-	  if (*q == ':')
+	  if (q < end)
 	    {
 	      char *new_multilib_os_dir = xmalloc (end - q);
-	      strncpy (new_multilib_os_dir, q + 1, end - q - 1);
-	      new_multilib_os_dir[end - q] = '\0';
+	      memcpy (new_multilib_os_dir, q + 1, end - q - 1);
+	      new_multilib_os_dir[end - q - 1] = '\0';
 	      multilib_os_dir = new_multilib_os_dir;
 	      break;
 	    }
@@ -6986,6 +6986,12 @@ print_multilib_info ()
 	  ++p;
 	}
 
+      /* When --disable-multilib was used but target defines
+	 MULTILIB_OSDIRNAMES, entries starting with .: are there just
+	 to find multilib_os_dir, so skip them from output.  */
+      if (this_path[0] == '.' && this_path[1] == ':')
+	skip = 1;
+
       /* Check for matches with the multilib_exclusions. We don't bother
          with the '!' in either list. If any of the exclusion rules match
          all of its options with the select rule, we skip it.  */