I modified the patches to be compatible with both environments. The new versions modify the configure.ac file also, therefore you will need to run "autoconf" by hand. Also, in case of MaOS you will need to have llvm-profdata installed and in your path.

I kept the expanded form of regrtest (/Lib/test/regrtest.py) because this way it is clearer to the user what is the main file that runs the training workload. 

Also, the "|| true" is necessary also, due to the nature of regrtest. This test suite is designed to return a fail code if a test is not ok, even for tests that do not comply with certain dependencies (meaning users that didn't installed any other libraries).