ld_syscalls.h

它通过提供glibc兼容使得应用程序移植到较小的c 库时相当得容易. 它能够应用到带虚拟存储的Linux和uClinux上.在大多数带MMU部件的平台上为使它更加紧凑,它也能够编译成共享库.uClib

/* Define the __set_errno macro as nothing so that INLINE_SYSCALL
 * won't set errno, which is important since we make system calls
 * before the errno symbol is dynamicly linked. */

#define __set_errno(X) {(void)(X);}
#include "sys/syscall.h"