[CMake] Porting autoconf checks to cmake

[Andreas Pakulat]

Hi,

I'm currently working on porting GNU Common C++ to CMake buildsystem to
be able to easily build it on win32. Along the way I found now an
autoconf check that I can't seem to find an equivalent for in CMake.

The check is AC_TYPE_SIGNAL and just checks for the return value of
signal handlers. It then sets a variable to either void or int,
depending on the outcome of the check.

So is there something like that coming with CMake or do I have to
rewrite the autoconf check in cmake myself or do I just miss something?

Andreas

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