https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78834
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |trippels at gcc dot gnu.org Resolution|--- |INVALID --- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- gcc-4.9 isn't supported anymore and optimize should only be used for debugging purposes. Use the build system instead and pass -fno-lto when building the file.