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Handling of #undef FOO

From: Ismail Dönmez
Subject: Handling of #undef FOO
Date: Sun, 6 Jan 2008 02:05:46 +0200
User-agent: KMail/1.9.6 (enterprise 0.20071204.744707)

Hi all,

As far as I know autoheader processes config.h.in and similar files. 

Now config.h.in contains 

#undef FOO

and process config.h might contains 

#define FOO

but it should be defined like this,

#ifndef FOO
#define FOO

else it will not compile with gcc 4.3 [0] . Any ideas?

[0] http://www.cyrius.com/journal/gcc/gcc-4.3-pedwarn.html 

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