ref: 2d534bb4fe76d68eb1ffb7805054d9acfef0e89e
dir: /lib/sys/bld.sub/
lib sys = sys+freebsd-x64.myr sys+linux-x64.myr sys+osx-x64.myr sys+plan9-x64.myr syscall+freebsd-x64.s syscall+linux-x64.s syscall+osx-x64.s syscall+plan9-x64.s syserrno+linux.myr syserrno+osx.myr syserrno+freebsd.myr systypes.myr ifreq+freebsd.myr ifreq+linux.myr ifreq+osx.myr ifreq+plan9.myr ifreq.myr # dummy file: plan9 doesn't have ifreq util+plan9-x64.s util+posixy-x64.s ;;