[PATCH] Check the consistency of the C and C++ compilers picked-up by cmake

[Arnaud A. de Grandmaison]

>From time to time, it happens that cmake picks up inconsistent C and C++ 
compilers, especially for new comers or people not (yet) familiar with their 
development environment.

This patch checks that both C and C++ compilers have the same ID (in cmake 
parlance) : Gnu, clang, ... This would catch gross mistakes at an early stage 
(configuration) instead of failing way later during compilation.

I am wondering though if we have some environment where such a mismatch is 
expected. Any thoughts ?

Cheers,
-- 
Arnaud A. de Grandmaison
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