http://sourceware.org/ml/gdb-patches/2012-05/msg00180.html
Subject: [patch] auto-load fix multi-dir debug-file-directory

Hi,

I forgot to fix this case myself, Python auto-load was implemented by:
	commit 1e5e2afd7cfa6bb62abb9493a514c70489e19c32
	Author: Tom Tromey <tromey@redhat.com>
	Date:   Thu May 28 00:40:23 2009 +0000

while multi-dir debug-file-directory was implemented by
	commit 36ae52d16cc9d38cfe317a79bb5d63c624359154
	Author: Jan Kratochvil <jan.kratochvil@redhat.com>
	Date:   Mon Nov 2 14:59:48 2009 +0000

No regressions on {x86_64,x86_64-m32,i686}-fedora17-linux-gnu.

And debug_file_directory really cannot be NULL after GDB initialization code.


Thanks,
Jan


gdb/
2012-05-07  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Make auto-load handle multiple components of DEBUG_FILE_DIRECTORY.
	* auto-load.c (auto_load_objfile_script): Remove check for NULL
	DEBUG_FILE_DIRECTORY.  Handle multiple components of
	DEBUG_FILE_DIRECTORY.

Diff --git a/gdb/auto-load.c b/gdb/auto-load.c
index 9d4d0bc..254de3b 100644
--- a/gdb/auto-load.c
+++ b/gdb/auto-load.c
@@ -587,17 +587,29 @@ auto_load_objfile_script (struct objfile *objfile,
   input = fopen (filename, "r");
   debugfile = filename;
 
-  if (!input && debug_file_directory)
+  if (!input)
     {
-      /* Also try the same file in the separate debug info directory.  */
-      debugfile = xmalloc (strlen (filename)
-			   + strlen (debug_file_directory) + 1);
-      strcpy (debugfile, debug_file_directory);
-      /* FILENAME is absolute, so we don't need a "/" here.  */
-      strcat (debugfile, filename);
+      char *debugdir;
+      VEC (char_ptr) *debugdir_vec;
+      int ix;
 
-      make_cleanup (xfree, debugfile);
-      input = fopen (debugfile, "r");
+      debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory);
+      make_cleanup_free_char_ptr_vec (debugdir_vec);
+
+      for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix)
+	{
+	  /* Also try the same file in the separate debug info directory.  */
+	  debugfile = xmalloc (strlen (debugdir) + strlen (filename) + 1);
+	  strcpy (debugfile, debugdir);
+
+	  /* FILENAME is absolute, so we don't need a "/" here.  */
+	  strcat (debugfile, filename);
+
+	  make_cleanup (xfree, debugfile);
+	  input = fopen (debugfile, "r");
+	  if (input != NULL)
+	    break;
+	}
     }
 
   if (!input && gdb_datadir)