[enhancement]better setup_command file

[miroi]

The setup_command is important file generated in the build directory, because it helps to preserve the exat setup command for repeating builds.

What is missing are proper apostrophes preserved in the command.

For example, in DIRAC we have

./setup --mpi --fc=mpif90 --cc=mpicc --cxx=mpiCC --int64 --extra-fc-flags=-xHost --extra-cc-flags=-xHost --extra-cxx-flags=-xHost build_openmpi_intelmkl_i8_xh"

instead of

./setup --mpi --fc=mpif90 --cc=mpicc --cxx=mpiCC --int64 --extra-fc-flags="-xHost" --extra-cc-flags="-xHost" --extra-cxx-flags="-xHost" build_openmpi_intelmkl_i8_xh"

Comments ?

[bast]

It would be nice but I don't know how to do it. See also #169.