Re: [PATCH] AC_USE_SYSTEM_EXTENSIONS: port to recent ISO C

Joseph Myers <[email protected]> Wed, 14 Sep 2016 20:10:44 +0000

Newsgroups	gmane.comp.sysutils.autoconf.patches
Message-ID	<[email protected]>

On Wed, 14 Sep 2016, Paul Eggert wrote:

> > (There are other feature test macros for
> > ISO C extensions as well.)
> 
> Thanks, is there a list of these new macros somewhere? I might as well add
> them all now.

ISO 24747 defines __STDC_WANT_MATH_SPEC_FUNCS__ (must be defined to expand 
to the integer constant 1).

TR 24732 defines __STDC_WANT_DEC_FP__ (only needs to be defined, expansion 
doesn't matter).  This has since been superseded by TS 18661-2, which 
defines __STDC_WANT_IEC_60559_DFP_EXT__ instead (again, expansion doesn't 
matter).

TS 18661-5 defines __STDC_WANT_IEC_60559_ATTRIBS_EXT__ (expansion doesn't 
matter).

TR 18037 does not define any feature test macros.

-- 
Joseph S. Myers
[email protected]