gcc

头文件搜索路径
gcc C_INCLUDEPATH
g++ CPLUS_INCLUDEPATH

ep: export CPLUS_INCLUDEPATH=/usr/lib/
扩展1

1. 输出 echo $C_INCLUDEPATH
2. 调用 $C_INCLUDEPATH
3. 赋值 export C_INCLUDEPATH
4. 删除变量 unset C_INCLUDEPATH
5. C++调用 string strValue(getenv("C_INCLUDEPATH")

1. 动态链接库搜索路径
   LD_LIBRARYPATH
2. 静态链接库搜索路径
   LIBRARY_PATH