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Date: Tue, 18 Mar 2014 16:38:34 +0100
From: Tijl Coosemans <tijl@FreeBSD.org>
To: toolchain@FreeBSD.org
Subject: clang 3.4 -fms-extensions __wchar_t conflicts with our __wchar_t
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Hi,

With -fms-extensions clang 3.4 seems to define a built-in type named
__wchar_t.  This conflicts with __wchar_t in /usr/include/machine/_types.h


% cat test.c 
#include <sys/types.h>
% cc -c test.c -fms-extensions
In file included from test.c:1:
In file included from /usr/include/sys/types.h:44:
In file included from /usr/include/machine/endian.h:6:
In file included from /usr/include/x86/endian.h:37:
In file included from /usr/include/sys/_types.h:33:
In file included from /usr/include/machine/_types.h:6:
/usr/include/x86/_types.h:145:14: error: cannot combine with previous 'int'
      declaration specifier
typedef int             __wchar_t;
                        ^
1 error generated.


What is the best way to resolve this?  Maybe rename the FreeBSD __wchar_t
to ___wchar_t?