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From: "guojiufu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/55602] Does not generate Error message for redefined macros
Date: Mon, 10 Dec 2012 11:58:00 -0000	[thread overview]
Message-ID: <bug-55602-4-UL0nsEFHVN@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-55602-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55602

--- Comment #2 from Jeff Guo <guojiufu at gmail dot com> 2012-12-10 11:57:57 UTC ---
-pedantic-errors is helpful if the redefined macros not guarded by "#pragma GCC
system_header"
--a.h --
#pragma GCC system_header
#define A 1
#define A 2
-----a.c----
#include "a.h"

int main(){
  return A;
}

----------------


  parent reply	other threads:[~2012-12-10 11:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-05  3:44 [Bug c++/55602] New: " guojiufu at gmail dot com
2012-12-05  5:00 ` [Bug preprocessor/55602] " pinskia at gcc dot gnu.org
2012-12-10 11:58 ` guojiufu at gmail dot com [this message]
2012-12-10 11:59 ` guojiufu at gmail dot com
2012-12-10 12:02 ` guojiufu at gmail dot com
2012-12-26  2:26 ` guojiufu at gmail dot com

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