陆续补充，未完待续...

一、编译环境

1. 查看当前头文件默认搜索路径

• 操作命令

  cpp -v

• 执行效果

  Using built-in specs.COLLECT_GCC=cppTarget: x86_64-linux-gnuThread model: posixgcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1) COLLECT_GCC_OPTIONS='-E' '-v' '-mtune=generic' '-march=x86-64'...#include "..." search starts here:#include <...> search starts here:/usr/lib/gcc/x86_64-linux-gnu/6/include/usr/local/include/usr/lib/gcc/x86_64-linux-gnu/6/include-fixed/usr/include/x86_64-linux-gnu/usr/includeEnd of search list.