查看默认包括`GCC -v`在Mac OS X的C头文件的路径？ [英] View default include path of C headers in Mac OS X by `gcc -v`?

问题描述

我试图找到默认包含在Mac OS X（小牛）C编译器的路径，通过使用的gcc -v ：

I tried to find the default include path of the C compiler in Mac OS X (Mavericks) by using gcc -v:

$ gcc -v
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/c++/4.2.1
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin13.0.0
Thread model: posix

这似乎告诉我路径<$c$c>/Applications/X$c$c.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/c++/4.2.1,但恐怕这是不是真正的路径。我认为包括标准C库中的真实路径<$c$c>/Applications/X$c$c.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include因为＆LT; SYS / syscall.h＆GT; 定位在后来的路径，这是<$c$c>/Applications/X$c$c.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sys/syscall.h

It seems to tell me the path is /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/c++/4.2.1, but I'm afraid it is not the true path. I think the true path for including standard C library is /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include because <sys/syscall.h> locates in the later path, which is /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sys/syscall.h

有没有人有关于如何查看所有默认的想法包括在Mac OS X C库的路径？

Does anyone have ideas about how to view all the default include path of C library in Mac OS X?

推荐答案

您需要询问的 preprocessor ​​的，不是的的gcc 的，告诉默认包含路径

You need to ask the preprocessor, not gcc, for telling the default include path.

您可以说：

`gcc -print-prog-name=cc1` -v

为了列出包括默认为C和C ++路径：

In order to list default include path for both C and C++:

`gcc -print-prog-name=cc1plus` -v

（即路径的你已经列出以上是用于的配置的一个，同时建立海合会）。

(The path that you've listed above is the one that was used to configure GCC while building.)

另一种方式列出默认包含路径将是：

Another way to list the default include path would be:

gcc -x c -v -E /dev/null

gcc -x c++ -v -E /dev/null     # (for C/C++)

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