configure now has a --with-gtest option that defaults to downloading gtest if it is not found. If --with-gtest=no then configure will succeed without gtest though then make check won't do anything other than to report that gtest was not found. The --with-tbb option now defaults to disabling tbb if it is not found. autogen.sh no longer downloads gtest. Hence a fresh git clone of mathicgb can now build out of the box with no options given even without tbb and without an internet connection. gtest is looked for at GTEST_PATH, so memtailor, mathic and mathicgb can now share the same download of gtest.