//1.检查头文件是否存在
$clang++ -E -x c++ - -v < /dev/null
ignoring nonexistent directory "/usr/include/c++/v1"
ignoring nonexistent directory "/usr/include"
注:说明macOS SDK 的头文件不存在
//2.安装xcode-select
$xcode-select --install
//3.获取header pkg
$xcode-select -p
//4.查看config
$brew config
//5.安装头文件
$ cd /Library/Developer/CommandLineTools/Packages/
$ open macOS_SDK_headers_for_macOS_10.14.pkg
来源:oschina
链接:https://my.oschina.net/u/2832792/blog/3035896