I was looking at http://www.cmake.org/Wiki/CMake_Useful_Variables and while scanning through it I once again saw how many variables we have for the different MSVC versions. Since it's unlikely that MSVC11 is the last (the variable is currently missing, but I'll fix that soon) I thought if it wouldn't be enough to just introduce a MSVC_VERSION variable. Setting this to 6.0 or 7.1 or 11 is easy, and checking it is easy since we have VERSION_LESS and friends. Checking for something like "MSVC >= 9.0" is currently a pain if one does not want to fall back to the CL_VERSION, which is not obvious as those versions are of a totally different range and one must always comment on what is checked there.
Patch for this should be trivial. Any opinions? Eike
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