https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65713
Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mpolacek at gcc dot gnu.org --- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Does it work if you use the -P option? Looks like a known issue described in https://gcc.gnu.org/gcc-5/porting_to.html