如何查询clang ++的默认包含路径？ [英] How to query the default include paths of clang++?

问题描述

如何查询clang / clang ++的默认包含路径？我尝试使用自定义的clang编译器（支持OpenMP的编译器），但是似乎找不到STL库：

How can I query the default include path of clang/clang++? I am trying to use a custom built clang compiler (the one that supports OpenMP), but it doesn't seem to find the STL libraries:

/usr/local/bin/clang++ hello.cpp 
hello.cpp:1:10: fatal error: 'iostream' file not found
#include <iostream>
     ^
1 error generated.

通过使用IDE，回溯#include iostream，最后使用- isystem 选项，我得到了一个简单的helloworld应用程序，可以在OSX 10.9中进行编译：

By using an IDE, back-tracking the #include iostream, and finally using the -isystem option I got the simple helloworld application to compile in OSX 10.9:

/usr/local/bin/clang++ -isystem /Library/Developer/CommandLineTools/usr/lib/c++/v1 hello.cpp

感谢您的帮助！

推荐答案

您正在寻找选项 -v 。使用 clang ++ -c file.cc -v 进行编译将显示以下内容：

You are looking for option -v. Compiling with clang++ -c file.cc -v will print among other things:

#include "..." search starts here:
#include <...> search starts here:
 /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9

等。

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