ref: 4865d137aa87e8ee60c39888f7febf3bbcaa2f4b 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