ref: 6042e40dd30c9e04934e635274a013f989695eb7
dir: /lib/sys/bld.sub/
lib sys = systypes.myr sys+freebsd-x64.myr sys+netbsd-x64.myr sys+linux-x64.myr sys+osx-x64.myr sys+plan9-x64.myr # openbsd versions. sys+openbsd-x64.myr sys+openbsd:6.1-x64.myr sys+openbsd:6.2-x64.myr sys+openbsd:6.3-x64.myr syscall+freebsd-x64.s syscall+netbsd-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+netbsd.myr syserrno+openbsd.myr ifreq+freebsd.myr ifreq+netbsd.myr ifreq+linux.myr ifreq+osx.myr ifreq+openbsd.myr ifreq+plan9.myr util+plan9-x64.s util+posixy-x64.s ;;