https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121185
--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> --- (In reply to Andrew Pinski from comment #1) > At least provide the exact options that is used for compiling the source? > > Is it -O3 or -Ofast ? > Do you compile with -march=native . > What target is the issue showing up on ? > > Also provide the output of gcc -v. I know, sorry just too busy today. The flags are the default flags set by autotools which are you -g -O2