http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53113
--- Comment #12 from David Kredba <nheghathivhistha at gmail dot com> --- (In reply to Jakub Jelinek from comment #8) > That is a user error, just don't do that. As the user provided > CFLAGS/CXXFLAGS override the default flags, you really shouldn't be using > -mno-this and -mno-that when building gcc, because that will disable what is > required to compile gcc successfully. If you want to build gcc to support > some CPU that doesn't have AVX etc., just configure it for such a CPU. I told it to GCC bootstrap (having C,XXFlags containing -march=native -mtune=native -mno-sse4.2 -mno-sse4a -mno-avx -mno-3dnow) and it ignored it completely.
