Paul E. Murphy 4fc12f0eda Add support for testing __STDC_WANT_IEC_60559_TYPES_EXT__ ...

This macro is defined by TS 18661-3 for supporting the _FloatN and
_FloatNx types, as well as the functions suffixed with fN.

	* bits/libc-header-start.h:
	(__GLIBC_USE_IEC_60559_TYPES_EXT): New macro.
	* include/features.h: Describe __STDC_WANT_IEC_60559_TYPES_EXT__.
	* manual/creature.texi: Likewise.

2017-05-09 11:40:28 -03:00

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