Eclipse 中新建C 或C ++到项目时,头文件报警,显示“Unresolved inclusion:<stdio.h>” 虽然不影响项目到编译和运行,确也无法查看头文件,让人感觉实在不爽。下面是在国外到网站上看到解决方案,自己整理了一下拿来分享一下。关于在Eclipse 下配置C /C ++ 开发环境这里不多说了。
  在终端下查看C 库文件到路径:
  $ echo "int main() { return 0; }" > a1.c
  $ gcc -v a1.c
  #include "..." search starts here:
  #include <...> search starts here:
  /usr/lib/gcc/x86_64-linux-gnu/4.9/include
  /usr/local/include
  /usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed
  /usr/include/x86_64-linux-gnu
  /usr/include
  搜索列表结束。
  ……
  查看C++ 库文件到搜索路径:
  $ echo "int main() { return 0; }" > a1.cpp
  $ g++ -v a1.cpp
  #include "..." search starts here:
  #include <...> search starts here:
  /usr/include/c++/4.9
  /usr/include/x86_64-linux-gnu/c++/4.9
  /usr/include/c++/4.9/backward
  /usr/lib/gcc/x86_64-linux-gnu/4.9/include
  /usr/local/include
  /usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed
  /usr/include/x86_64-linux-gnu
  /usr/include
  搜索列表结束。
  上述路径因人而异。
  在eclipse中菜单Window --> Preferences --> C/C++ --> Build --> Environment添加环境变量
  C_INCLUDE_PATH =/usr/lib/gcc/x86_64-linux-gnu/4.9/include:/usr/local/include:/usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed:/usr/include/x86_64-linux-gnu:/usr/include
  CPLUS_INCLUDE_PATH =/usr/include/c++/4.9:/usr/include/x86_64-linux-gnu/c++/4.9:/usr/include/c++/4.9/backward:/usr/lib/gcc/x86_64-linux-gnu/4.9/include:/usr/local/include:/usr/lib/gcc/x86_64-linux-gnu/4.9/include-fixed:/usr/include/x86_64-linux-gnu:/usr/include
  记得选中下面的Append variables to native environment.
  添加完后重启Eclipse 新建项目即可。