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Make min_of_type_ macros function-like.
math_private.h uses __MATH_TG in defining the min_of_type macro used within libm, with min_of_type_<suffix> macros for each type. This runs into problems with __MATH_TG expansions used with additional _FloatN and _FloatNx type support, because those can end up macro-expanding the FUNC argument to __MATH_TG before it gets concatenated with a suffix - meaning that min_of_type_ can't simultaneously be the macro name for double, and a prefix to other macro names, since the latter case requires such premature macro expansion not to occur. (This is not a problem for the uses of __MATH_TG in installed headers because FUNC there is a function name in the implementation namespace, and the suffixes themselves don't get macro-expanded.) This patch fixes the problem by making min_of_type_<suffix> macros function-like, so no macro expansion occurs when min_of_type_ is expanded on its own as a macro argument, only later when followed by () after expansion. Tested for x86_64, including in conjunction with _Float64x support patches. * sysdeps/generic/math_private.h (min_of_type_f): Make into a function-like macro. (min_of_type_): Likewise. (min_of_type_l): Likewise. (min_of_type_f128): Likewise. (min_of_type): Pass () as last argument of __MATH_TG.
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@ -1,5 +1,12 @@
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2017-11-24 Joseph Myers <joseph@codesourcery.com>
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* sysdeps/generic/math_private.h (min_of_type_f): Make into a
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function-like macro.
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(min_of_type_): Likewise.
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(min_of_type_l): Likewise.
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(min_of_type_f128): Likewise.
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(min_of_type): Pass () as last argument of __MATH_TG.
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* stdlib/tst-strtod-round-skeleton.c
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(__STDC_WANT_IEC_60559_TYPES_EXT__): Define before including
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headers.
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@ -298,12 +298,15 @@ extern void __docos (double __x, double __dx, double __v[]);
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#define fabs_tg(x) __MATH_TG ((x), (__typeof (x)) __builtin_fabs, (x))
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#define min_of_type_f FLT_MIN
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#define min_of_type_ DBL_MIN
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#define min_of_type_l LDBL_MIN
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#define min_of_type_f128 FLT128_MIN
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/* These must be function-like macros because some __MATH_TG
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implementations macro-expand the function-name argument before
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concatenating a suffix to it. */
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#define min_of_type_f() FLT_MIN
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#define min_of_type_() DBL_MIN
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#define min_of_type_l() LDBL_MIN
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#define min_of_type_f128() FLT128_MIN
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#define min_of_type(x) __MATH_TG ((x), (__typeof (x)) min_of_type_, )
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#define min_of_type(x) __MATH_TG ((x), (__typeof (x)) min_of_type_, ())
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/* If X (which is not a NaN) is subnormal, force an underflow
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exception. */
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