On 11 Jul 2013, at 13:11, Bruce Evans <b...@optusnet.com.au> wrote: > The error message for the __builtin_isnan() version is slightly better up > to where it says more. > > The less-unportable macro can do more classification and detect problems > at compile time using __typeof().
The attached patch fixes the related test cases in the libc++ test suite. Please review. This does not use __builtin_isnan(), but it does: - Stop exposing isnan and isinf in the header. We already have __isinf in libc, so this is used instead. - Call the static functions for isnan __inline__isnan*() so that they don't conflict with the ones in libm. - Add an __fp_type_select() macro that uses either __Generic(), __builtin_choose_expr() / __builtin_choose_expr(), or sizeof() comparisons, depending on what the compiler supports. - Refactor all of the type-generic macros to use __fp_type_select(). David
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