我的C ++编译器在哪里解决我的#includes？ [英] Where does my C++ compiler look to resolve my #includes?

问题描述

这是一个真正的基本问题。我一直在学习C ++，迄今为止我只使用标准库。我一直在包括< iostream> ，没有问题。现在我想使用Apache Xerces，所以我已经安装在我的机器（一个Debian系统），并遵循一个教程，说我需要包括：

this is a really basic question. I've been learning C++ and thus far I have only used the standard library. I have been including things like <iostream> and with no problems. Now I want to use Apache Xerces, so I've installed it on my machine (a Debian system) and am following a tutorial which says I need to include:

#include <xercesc/sax2/SAX2XMLReader.hpp>

但g ++说错误：xercesc / sax2 / SAX2XMLReader.hpp：没有这样的文件或目录。它在哪里？我需要给它更多的信息吗？

but g++ says "error: xercesc/sax2/SAX2XMLReader.hpp: No such file or directory". Where is it looking? Do I need to give it more information?

谢谢。

推荐答案

使用 - verbose 选项：

[...]
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/i686-pc-linux-gnu/4.4.2/../../../../include/c++/4.4.2
 /usr/lib/gcc/i686-pc-linux-gnu/4.4.2/../../../../include/c++/4.4.2/i686-pc-linux-gnu
 /usr/lib/gcc/i686-pc-linux-gnu/4.4.2/../../../../include/c++/4.4.2/backward
 /usr/local/include
 /usr/lib/gcc/i686-pc-linux-gnu/4.4.2/include
 /usr/lib/gcc/i686-pc-linux-gnu/4.4.2/include-fixed
 /usr/include
End of search list.
[...]

您可以使用 -I 选项添加搜索目录，如下所述： http://gcc.gnu.org/onlinedocs/gcc-4.4.3/gcc/Directory-Options.html#Directory-Options

You can use the -I option to add search directories, as explained here: http://gcc.gnu.org/onlinedocs/gcc-4.4.3/gcc/Directory-Options.html#Directory-Options

您还可以使用环境变量永久更改此设置： http： //gcc.gnu.org/onlinedocs/gcc-4.4.3/gcc/Environment-Variables.html#Environment-Variables

在您的情况下，您可以使用 CPLUS_INCLUDE_PATH 。

You can also use environment variables to change this permanently: http://gcc.gnu.org/onlinedocs/gcc-4.4.3/gcc/Environment-Variables.html#Environment-Variables
In your case, you could use CPLUS_INCLUDE_PATH.

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