[LLVMdev] [RFC] Raise minimum required CMake version to 2.8.12.2

[Chris Bieneman]

Hello LLVM-Dev!

I would like to request that we raise the minimum required CMake version to 2.8.12.2.

My primary reason is that I would like to re-land this patch http://reviews.llvm.org/D8380 <http://reviews.llvm.org/D8380> which broke the buildbots due to using a CMake 2.8.12 feature (see: http://lab.llvm.org:8011/builders/polly-amd64-linux/builds/28499/steps/cmake-configure/logs/stdio <http://lab.llvm.org:8011/builders/polly-amd64-linux/builds/28499/steps/cmake-configure/logs/stdio>)

Additionally since we are updating MSVC users would benefit from a fix in 2.8.12.1, and Xcode users would benefit from fixes in 2.8.12.2

CMake 2.8.12.2 is also the version in Ubuntu Trusty.

Thanks,
-Chris


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