http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53155
Bug #: 53155 Summary: Not parallel: test for -j fails Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: testsuite AssignedTo: unassig...@gcc.gnu.org ReportedBy: marc.gli...@normalesup.org Hello, in order to decide whether they should run the testsuite in parallel, the makefiles in gcc/ and libstdc++-v3/testsuite/ use the following test: [ "$(filter -j, $(MFLAGS))" = "-j" ] However, at least with the gnu make 3.81 shipped by debian, MFLAGS merges all options, so it would normally be something like -wkj, which doesn't match the filter.