ref: b868a47d2e43c8f622f2a0f65a926dd1c6c33a96 dir: /lib/c/target/amd64-sysv-openbsd/syscall.mk/
SYSCALL = _Exit.o _read.o _write.o _open.o _close.o _brk.o _getpid.o _kill.o _sigaction.o _lseek.o