
- retire LIBDCK, LIBG2C and (long broken) USE_LIBSTDCXX - in bsd.hostprog.mk's LIBSTDCPP -> LIBSTDCC - add LIBSUPCXX - don't default USE_LIBSTDCXX or USE_GCC4 since they are not used in the tree any where - same with USE_XF86_4; retire it - remove _SUPCXX handling in bsd.prog.mk inspired by PR#26714.