https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241
--- Comment #4 from Raymond Langer <r.langer at itv dot rwth-aachen.de> --- (In reply to Marek Polacek from comment #3) > I cannot reproduce this: > > $ xg++ -c a-eigen_bug.ii -O3 -ffast-math -march=haswell > compiles. Yes, g++ -c a-eigen_bug.ii -O3 -ffast-math -march=haswell compiles. However, -Ofast does not work together with -ffast-math: g++ -c a-eigen_bug.ii -Ofast -ffast-math -march=haswell
