macos 构建 C++ 应用程序时，OSX 系统包含文件的默认路径是什么？
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What is the default path for OSX system include files when building a C++ application?
提问by Dan Nissenbaum
I am building a C++ application at the command line (using makewith an open-source library (Xerces 2.8)). One of the files includes an OSX system file,
我正在命令行构建 C++ 应用程序（使用make开源库 (Xerces 2.8)）。其中一个文件包括一个 OSX 系统文件，
#include <TextUtils.h>
When I type make -nto determine the command used to compile the given file, there is no include path for the system framework files provided. Therefore, I assume that on OSX the gcc compiler looks in a default location for system include files.
当我键入make -n以确定用于编译给定文件的命令时，提供的系统框架文件没有包含路径。因此，我假设在 OSX 上，gcc 编译器会在系统包含文件的默认位置查找。
I would like to know what this location is. When I search for TextUtils.h, I see many versions of the file in different locations, including a few different possible candidates for what might be a default location.
我想知道这个位置是什么。当我搜索 时TextUtils.h，我会在不同位置看到该文件的许多版本，其中包括一些可能是默认位置的不同候选位置。
How can I determine the default path the system uses for system include files?
如何确定系统用于系统包含文件的默认路径？
回答by Eelke
Executing the following command
执行以下命令
# echo "" | gcc -xc - -v -E
will output the buildin configuration of gcc among which are the default includes.
将输出 gcc 的内置配置，其中默认包含。
