ttyname fails in chroot.preadvwritev tests fail because of buggy kernel of host system (the test file has a comment about this issue). I've seen and investigated them. Don't worry.This mail was written on my phone. Sorry for HTML and bad formatting.--
No. GCC doesn't require ISL. "info gccinstall" says for ISL:Necessary to build GCC with the Graphite loop optimizations. If we don't need Graphite optimization, we can skip ISL. Is Graphite enabled at -O2? I don't know. If not I think it should be rarely used.But on the other hand ISL seems
