ref: 22e4f93e4cfa71867709d7486793d4f7a912dbbf dir: /lib/c/target/amd64-sysv-linux-elf/syscall.mk/
SYS = _read.o _write.o _open.o _close.o _lseek.o _brk.o _rt_sigaction.o _getpid.o _Exit.o _kill.o