ref: e2bc82d84b9e30a1fe8bf4320e27c2cccf47c0dc 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