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[PATCH, preprocessor]: Fix 'may be used uninitialized' warning


For my '-O3 -ffast-math' uber-optimized build, bootstrap dies
compiling libcpp/traditional.c due to a bunch of 'may be used
uninitialized' warnings.

Attached patch fixes warnigns and allows bootstrap to finish.

2007-07-04 Uros Bizjak <>

	* traditional.c (_cpp_scan_out_logical_line): Initialize
	fmacro.args, fmacro.node, fmacro.offset, fmacro.line and
	fmacro.args to prevent 'may be used uninitialized' warning.

I'll commit this patch as obvious to mainline SVN.


Index: traditional.c
--- traditional.c      (revision 126307)
+++ traditional.c      (working copy)
@@ -1,5 +1,5 @@
/* CPP Library - traditional lexical analysis and macro expansion.
-   Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
   Contributed by Neil Booth, May 2002

This program is free software; you can redistribute it and/or modify it
@@ -353,6 +353,11 @@ _cpp_scan_out_logical_line (cpp_reader *
  const uchar *start_of_input_line;

  fmacro.buff = NULL;
+  fmacro.args = NULL;
+  fmacro.node = NULL;
+  fmacro.offset = 0;
+  fmacro.line = 0;
+  fmacro.argc = 0;

  quote = 0;
  header_ok = pfile->state.angled_headers;

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