Run both compilers at the same time to speed things up.
Add --tokenize, --parse and --run options to only compare the compilers in one of the three possible ways. If none are given, compare in all three ways.
Don't compare linker error messages that don't have to match, e.g. different offsets within binary files, different paths to object files.
--tokenize,--parseand--runoptions to only compare the compilers in one of the three possible ways. If none are given, compare in all three ways.