Date: Mon, 1 Jul 2002 18:49:10 +0200 (CEST) From: Stefan Farfeleder <e0026813@stud3.tuwien.ac.at> To: FreeBSD-gnats-submit@FreeBSD.org Cc: obrien@FreeBSD.org Subject: standards/40084: g++ complaining about redeclaration of wchar_t with -pedantic Message-ID: <20020701164910.BD0F1263@frog.fafoe>
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>Number: 40084
>Category: standards
>Synopsis: g++ complaining about redeclaration of wchar_t with -pedantic
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-standards
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Mon Jul 01 11:10:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Stefan Farfeleder
>Release: FreeBSD 4.6-STABLE i386
>Organization:
>Environment:
System: FreeBSD frog.fafoe 4.6-STABLE FreeBSD 4.6-STABLE #9: Sat Jun 29 22:00:32 CEST 2002 root@frog.fafoe:/usr/obj/usr/src/sys/FROG i386
>Description:
With the update to gcc 2.95.4, code to distinguish system headers from others
was disabled in is_system_include(). As a consequence, warnings (only with
-pedantic) about wchar_t being redeclared (because wchar_t is builtin in C++)
aren't suppressed anymore.
>How-To-Repeat:
%cat wchar.cc
#include <cstddef>
int
main()
{
}
%g++ -ansi -pedantic -W -Wall wchar.cc
In file included from /usr/include/g++/cstddef:6,
from wchar.cc:1:
/usr/include/stddef.h:58: warning: redeclaration of wchar_t as `int'
>Fix:
One possible solution would be not to define _BSD_WCHAR_T_ in ansi.h when
compiling in C++ mode:
--- ansi.h.orig Mon Jul 1 18:01:39 2002
+++ ansi.h Mon Jul 1 18:03:45 2002
@@ -56,7 +56,10 @@
#define _BSD_SSIZE_T_ int /* byte count or error */
#define _BSD_TIME_T_ long /* time()... */
#define _BSD_TIMER_T_ int /* timer_gettime()... */
+/* wchar_t is builtin in C++ */
+#ifndef __cplusplus
#define _BSD_WCHAR_T_ _BSD_CT_RUNE_T_ /* wchar_t (see below) */
+#endif
#define _BSD_WINT_T_ _BSD_CT_RUNE_T_ /* wint_t (see below) */
/*
>Release-Note:
>Audit-Trail:
>Unformatted:
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