msvcrt: Add INFINITY and NAN definitions to math.h.
fgouget at free.fr
Mon Jan 13 06:13:34 CST 2014
On Sat, 11 Jan 2014, Jacek Caban wrote:
> __builtin_* stuff is compiler, not OS, dependent, so this should work on
> Solaris when GCC is used. We still have to use __port_nan()-like solution as a
> fallback for compilers that we can't support other way, but IMO we should try
> harder to provide a better definition.
The only NAN definitions I see on Solaris are in /usr/include/iso/math_c99.h:
#if defined(_STDC_C99) || _XOPEN_SOURCE - 0 >= 600 || defined(__C99FEATURES__)
# if defined(__GNUC__)
# undef NAN
# define NAN (__builtin_nanf(""))
# undef NAN
# define NAN __builtin_nan
The problem is:
* Not all systems have iso/math_c99.h so we cannot unconditionally
include it. But autoconf macros checks like HAVE_XXX are not allowed
in the Winelib headers. This means we cannot include math_c99.h from
our math.h header.
* The system math.h header includes math_c99.h unconditionally. But
including the system math.h from our own does not seem possible (I
don't think forcing the Winelib users to use weird
-I/symlink/to/usr/include would be acceptable).
* __builtin_nanf() is not a macro so we cannot check for it. So we'd
have to duplicate either Solaris' or Linux's #ifdefs but that looks
So I'm not sure there is much more we can do.
Francois Gouget <fgouget at free.fr> http://fgouget.free.fr/
La terre est une bêta...
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