https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71671
--- Comment #9 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- Well, we need to full gcc invocation of: CXX graph_blockmodel.lo So please run "make VERBOSE=1" and post the full gcc command line and the preprocessed testcase. All other output is useless.