https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97637
--- Comment #4 from Christer Solskogen <christer.solskogen at gmail dot com> --- Okay, so LTO together with O2/O3 or Ofast will not help code size that much. I was worried that something was wrong with how GCC was configured or the command line parameters I was using since the binary increased in size.
