ref: aec67e43c52fcc1857d00d498d82189bbf0f680a dir: /lib/c/target/amd64-sysv-openbsd/syscall.mk/
SYSCALL = _Exit.o _read.o _write.o _open.o _close.o _brk.o _getpid.o _sigaction.o _kill.o _lseek.o