bison: factoring.

[bison.git] / src / files.c

diff --git a/src/files.c b/src/files.c
index d995d1871dd0452dff47d6e256bb30d676ffbd14..07f761b461cb1a6e6fee7f692031b3968ee0f38c 100644 (file)
--- a/src/files.c
+++ b/src/files.c
@@ -1,7 +1,7 @@
 /* Open and close files for Bison.
 
    Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
-   2005, 2006, 2007 Free Software Foundation, Inc.
+   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -267,7 +267,9 @@ compute_file_name_parts (void)
       if (spec_file_prefix)
        {
          /* If --file-prefix=foo was specified, ALL_BUT_TAB_EXT = `foo'.  */
-         dir_prefix = xstrndup (grammar_file, base - grammar_file);
+         dir_prefix =
+            xstrndup (spec_file_prefix,
+                      last_component (spec_file_prefix) - spec_file_prefix);
          all_but_tab_ext = xstrdup (spec_file_prefix);
        }
       else if (yacc_flag)