[Chicken-hackers] [PATCH] Fix isnormal() on Mingw, restore tests (fixing #1062 properly)

[Peter Bex]

Hi all,

While investigating how to make isnormal() work on Solaris (but before
figuring out we need to define __C99FEATURES__), I came across an
alternate solution involving __builting_isnormal, which apparently
is a GCC builtin that performs the same function as the isnormal()
macro defined in <math.h>.

This builtin seems to work properly on Mingw, so I think it's safe
to undefine the broken isnormal and replace it with the builtin one
on Windows.

Cheers,
Peter
-- 
http://www.more-magic.net

0001-Fix-isnormal-problem-on-MingW-by-using-gcc-builtin-i.patch
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