One-step build/install CMake 3

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CMake 3 adds clean factory macros, especially for Fortran, HDF5, and Matlab.

CMake version features added include
3.11 specify targets intially w/o sources
3.10 added Fortran Flang (LLVM) compiler, extensive MPI features added
3.9 further C# and Cuda support originally added in CMake 3.8.


One-step download/build/install Cmake 3 using


brew install cmake

native Windows

Use the Windows win64-x64 installer

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