The following directories are empty, can they be removed? libstdc++-v3/testsuite/28_regex/headers/04_header/regex libstdc++-v3/testsuite/28_regex/headers/04_header libstdc++-v3/testsuite/28_regex/algorithms/02_match/extended libstdc++-v3/testsuite/28_regex/algorithms/02_match/basic libstdc++-v3/testsuite/28_regex/algorithms/02_match Matthias