http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55810
Bug #: 55810
Summary: pedantic-errors can not show message for redefined
macros in system_header
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: guoji...@gmail.com
Referenced from Bug 16358 and 55602. If there is "#pragma GCC
system_header", it silently overwrites the previous defined macro.
-pedantic-errors can not help.
--a.h --
#pragma GCC system_header
#define A 1
#define A 2
-----a.c----
#include "a.h"
int main(){
return A;
}
------------
gcc a.c -pedantic-errors
