[cmake-developers] ProcessUNIX and ANSI != POSIX

[Chuck Atkins]

I've added an extra configure check in KWSys for ProcessUNIX.c to test for
the required POSIX function sigaction.  Previously the build would
mysteriously fail if it's not available (if building in strict ANSI mode,
for instance); now at least the failure will be at configure time and for
reasonably clear reasons.

http://review.source.kitware.com/#/c/18065/

- Chuck
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