Index: gdb/buildsym.c
===================================================================
RCS file: /cvs/src/src/gdb/buildsym.c,v
retrieving revision 1.47
diff -u -r1.47 buildsym.c
--- gdb/buildsym.c	27 Feb 2007 22:57:42 -0000	1.47
+++ gdb/buildsym.c	15 Mar 2007 01:14:14 -0000
@@ -549,7 +549,18 @@
 
   for (subfile = subfiles; subfile; subfile = subfile->next)
     {
-      if (FILENAME_CMP (subfile->name, name) == 0)
+      char *subfile_name;
+      if (IS_ABSOLUTE_PATH(name) && !IS_ABSOLUTE_PATH (subfile->name))
+	{
+	  subfile_name = concat (dirname, SLASH_STRING,
+				 subfile->name, (char *)NULL);
+	  make_cleanup (xfree, subfile_name);
+	}
+      else
+	{
+	  subfile_name = subfile->name;
+	}
+      if (FILENAME_CMP (subfile_name, name) == 0)
 	{
 	  current_subfile = subfile;
 	  return;