On Sun, Jan 03, 2021 at 06:53:07AM +0800, Po-Chuan Hsieh wrote: > If you build this port with c++17, shouldn't this be changed to c++17-lang? In theory, yes, but in practice, all the variants past c++11-lang are equivalent in Mk/bsd.compiler.mk. They all factor down to "use a modern compiler". mcl