ref: c33620540f35a1e64e0a60ee885520cfde9e8471
dir: /lib/sys/bld.sub/
lib sys = systypes.myr sys+freebsd-x64.myr sys+linux-x64.myr sys+osx-x64.myr sys+openbsd-x64.myr sys+plan9-x64.myr syscall+freebsd-x64.s syscall+linux-x64.s syscall+osx-x64.s syscall+plan9-x64.s syscall+openbsd-x64.s syserrno+linux.myr syserrno+osx.myr syserrno+freebsd.myr syserrno+openbsd.myr ifreq+freebsd.myr ifreq+linux.myr ifreq+osx.myr ifreq+openbsd.myr ifreq+plan9.myr util+plan9-x64.s util+posixy-x64.s ;;