Cactus: remove piraha cache files in -clean and -realclean
Cactus: use mkpath rather than make_path to support old perl
at least perl 5.10 in BlueWaters does not provide make_path in File::Path. For our purposes however, the legacy mkpath is equivalent.
Cactus: use mkpath rather than make_path to support old perl
at least perl 5.10 in BlueWaters does not provide make_path in File::Path. For our purposes however, the legacy mkpath is equivalent.
Cactus: remove piraha cache files in -clean and -realclean