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DetermineCompiler: no preference for lang named binary

Vicente Bolea requested to merge vbolea/cmake:change-compiler-determination into master

Fixes: https://gitlab.kitware.com/ecp/cmake-support/-/issues/23

  • OLD behavior: When finding the compiler path give preference to the binary named ${language} in the path.
  • NEW behavior: When finding the compiler path the preference is given by the order of the HINT list of binaries for the particular language.

This was needed since in NERSC Perlmutter when loading the Cray compiler suite it adds to the PATH the binaries cc for C and CC for C++. It does not add a binary named c++ as it is customary in other compiler vendors. This resulted in CMake picking the /usr/bin/c++ binary with in this case was a link to the GNU compiler.

Edited by Vicente Bolea

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