[CMake] CheckTypeSize and non-standard headers

[Aaron Turner]

I'm trying to figure out how to write my CMakeLists.txt file to find
wint_t under OSX which defines it in /usr/include/runetype.h rather
then one of the standard headers that CheckTypeSize uses.  I was
hoping Cmake behaved like autotools where if you first look for the
header it will automatically include it in future type checks, but
that doesn't seem to be the case.

Suggestions?

-- 
Aaron Turner
http://synfin.net/
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