https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104023
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> --- I have the following suggestion: - require all C++ files in gcc/testsuite to have .C extension with the following exceptions: 1) allow .cc and .cpp for tests of inherited projects (./gdc.test) 2) allow .cc extension for additional files not used directly, but require the file ending with -aux.cc or -main.cc. Note quite some filenames do follow the naming scheme What do you think?