https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68347
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > Are you sure that problem is not in GREP_OPTIONS='--color=always' which > according to man results in color output using default color scheme '01;31'? No! but you can do the test by unsetting GREP_OPTIONS. What I am sure is that building in the source directory is not supported.
