New comment by congdanhqx on void-packages repository https://github.com/void-linux/void-packages/pull/12367#issuecomment-500438274 Comment: I'm not sure if it's ok to introduce `BUILD_CXX`. `CXX_FOR_BUILD` sounds awkward to me, and AFAICT, `BUILD_{CXX,CPP,LD,F}FLAGS` is newer than `{CXX,CPP,LD,F}FLAGS_FOR_BUILD`, but `BUILD_{CC,CFLAGS}` is newer than `{CC,CFLAGS}_FOR_BUILD}`. Feel free to drop the first patch and amend the second one if it's desired.