svn commit: r253563 - head/contrib/libstdc++/include/c_std
theraven at FreeBSD.org
Fri Jul 26 10:52:45 UTC 2013
On 26 Jul 2013, at 11:26, Tijl Coosemans <tijl at coosemans.org> wrote:
> On Fri, 26 Jul 2013 10:43:07 +0100 David Chisnall wrote:
>> On 25 Jul 2013, at 19:19, Tijl Coosemans <tijl at coosemans.org> wrote:
>>> This also
>>> broke compilation of C code with -D_XOPEN_SOURCE=500.
>> Do you have a test case for this?
> % cc -c test.c -D_XOPEN_SOURCE=500 -Wall -std=gnu89
> test.c:5:10: warning: implicit declaration of function 'isnan'
> return( isnan( d ));
> 1 warning generated.
> The isnan function is part of SUSv2:
> _XOPEN_SOURCE is handled in sys/cdefs.h. It sets the following macros:
> #define __XSI_VISIBLE 500
> #define __POSIX_VISIBLE 199506
> #define __ISO_C_VISIBLE 1990
So, isnan and isinf should be visible in functions when in __ISO_C_VISIBLE < 1999 and __XSI_VISIBLE < 600,
and __XSI_VISIBLE >= 500?
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