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[Bug libc/6981] __STDC_IEC_559__ should not be defined unconditionally
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Fri, 07 Feb 2014 02:40:57 +0000
- Subject: [Bug libc/6981] __STDC_IEC_559__ should not be defined unconditionally
- Auto-submitted: auto-generated
- References: <bug-6981-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=6981
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
__STDC_IEC_559__ is now conditional, reflecting the intent (not necessarily
completeness) regarding Annex F support, in glibc 2.19 given GCC 4.9 or later
(these sorts of corner cases are only expected to work for current GCC and
glibc working together).
Annex F permits FLT_EVAL_METHOD other than 0. The relevant GCC macros are
defined conditional on such options as -ffast-math that indicate a user intent
contrary to Annex F. GCC 4.9 disables contraction in strict conformance modes
(and if reenabled in those modes, __STDC_IEC_559__ will then not be defined).
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