ref: 63c625229ddae2be9785f8c9a0e4e5c5d2a6cb6c dir: /libc/src/sys/amd64-linux/system.mk/
$(SYSOBJ) = _read.o _write.o _open.o _close.o _lseek.o _brk.o _rt_sigaction.o _getpid.o _Exit.o _kill.o _sbrk.o