On Fri, 11 Sep 2020 at 23:20, Josh Marshall <joshua.r.marshall.1991@xxxxxxxxx> wrote: > > That's not quite it. While I did see a few things which I should have > done better, I'm getting similar errors. Even after a few rebases on > gnu's master I'm getting failures when invoking arguments to test > c++20 code. The output is below. No new information is in > libstdc++.sum. Because that file is just the summary of results, look in libstdc++.log for the errors. The errors you're getting mean the testsuite won't even start, because the support files that need to be compiled before any tests run are failing to compile. The .log file will tell you what's wrong.