On 06/16/2016 08:57, Yuri wrote: >> >> Mmmm, maybe USE_CXXSTD=c++14. > > > No, none of these helped. Actually, USE_CXXSTD=c++14 does add -std=c++14, but it is cleared by the subsequent -std=c++11 added by compiler:c++14-lang. So this is definitely a bug. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210327 Yuri