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为什么/usr/include/linux/stddef.h是空的?
阅读量:397 次
发布时间:2019-03-05

本文共 474 字,大约阅读时间需要 1 分钟。

文章目录

1.首先可以测试OS是否有stddef.h头文件?

  • 单独编译头文件
gcc -E - <<<'#include
' | grep stddef.h或者gcc -E - <<<"#include
" | grep stddef.h
  • 通常情况下C库的头文件在/usr/lib/中,在ubuntu15.04上/usr/include/linux/stddef.h是空的,在Centos上,是有内容的,内容如下:
#ifndef _LINUX_STDDEF_H#define _LINUX_STDDEF_H#undef NULL#if defined(__cplusplus)#define NULL 0#else#define NULL ((void *)0)#endif#endif
  • 要么就是Makefile文件导致的
    删除Makefile文件中的nostdinc选项
  • 结论:一般不用去关系这个问题,肯定是其它报错引起的

2.查看gcc编译器默认支持的c语言标准

gcc -E -dM - 
  • 参考:

转载地址:http://qufzz.baihongyu.com/

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