Mark Linimon <linimon at FreeBSD.org> writes: > -USES= gmake localbase > +USES= gl gmake localbase > +USE_CXXSTD= c++98 -std=gnu++98 (not -std=c++98) is default on GCC < 6. Not sure if any GNU extensions affect runtime, though. https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Extensions.html