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At the last WG14 meeting, <http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2711.htm> was accepted, which places more emphasis on the new fmaximum / fminimum functions and less on the old fmax / fmin functions. Some of the changes are to examples, notes or otherwise don't require implementation changes. However, the changes include removing the _FloatN / _FloatNx versions of the fmax and fmin functions that came from TS 18661-3. Thus, those function versions should only be declared under similar conditions to the _FloatN / _FloatNx versions of fmaxmag and fminmag: for _GNU_SOURCE and pre-C2X use of __STDC_WANT_IEC_60559_TYPES_EXT__, but not for C2X without _GNU_SOURCE. In turn this requires a tgmath.h change so that the corresponding tgmath.h macros, for C2X with __STDC_WANT_IEC_60559_TYPES_EXT__ but without _GNU_SOURCE, don't try to use function variants that aren't declared. (That issue doesn't arise for the tgmath.h macros for fmaxmag and fminmag, because those aren't defined at all in those circumstances unless __STDC_WANT_IEC_60559_BFP_EXT__ (from TS 18661-1 and not specified at all by C2X) is also defined, and in that case the _FloatN / _FloatNx versions of fmaxmag and fminmag get declared - this is only ever an issue when it's possible for some functions corresponding to a type-generic-macro to be declared, and for _FloatN / _FloatNx functions in general to be declared, but without the _FloatN / _FloatNx functions corresponding to that particular macro being declared.) Tested for x86_64. |
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| .. | ||
| cmathcalls.h | ||
| mathcalls-helper-functions.h | ||
| mathcalls-narrow.h | ||
| mathcalls.h | ||