未定义的引用'boost :: system :: generic_category（）'？ [英] Undefined reference to 'boost::system::generic_category()'?

问题描述

似乎我无法看到明显的。我想为我的项目使用一些Boost库功能，并且知道我突然得到这些错误：

it seems that i am unable to see the obvious. I wanted to use some Boost library features for my project and know i am getting these nice errors all of a sudden:

链接CXX可执行文件
CMakeFiles / ATFOR.dir / stdafx.cc.o：在函数 __ static_initialization_and_destruction_0（int，int）'：
stdafx.cc:(.text+0x3c）：未定义引用 boost :: system :: generic_category（）$ boost $ system $（$）
stdafx.cc：（text + 0x48）：未定义引用< '
stdafx.cc:(.text+0x54）：未定义的引用 boost :: system :: system_category（）'
CMakeFiles / ATFOR.dir / Main.cc。 o：在函数 __ static_initialization_and_destruction_0（int，int）'：
Main.cc:(.text+0x29d）：未定义的引用 boost :: system :: generic_category （）'
Main.cc:(.text+0x2a9）：未定义的引用 boost :: system :: generic_category（）'
Main.cc:(.text+0x2b5 ）：未定义引用 boost :: system :: system_category（）'
collect2：error：ld返回1退出状态

Linking CXX executable ATFOR CMakeFiles/ATFOR.dir/stdafx.cc.o: In function __static_initialization_and_destruction_0(int, int)': stdafx.cc:(.text+0x3c): undefined reference toboost::system::generic_category()' stdafx.cc:(.text+0x48): undefined reference to boost::system::generic_category()' stdafx.cc:(.text+0x54): undefined reference toboost::system::system_category()' CMakeFiles/ATFOR.dir/Main.cc.o: In function __static_initialization_and_destruction_0(int, int)': Main.cc:(.text+0x29d): undefined reference toboost::system::generic_category()' Main.cc:(.text+0x2a9): undefined reference to boost::system::generic_category()' Main.cc:(.text+0x2b5): undefined reference toboost::system::system_category()' collect2: error: ld returned 1 exit status

在这里，您可以找到我的CMakeLists.txt，标题和主要内容： http://pastie.org/8231509

正如你可以看到的，我试着很多玩CMakeLists，我很肯定，我有我的项目需要的所有标题。无论如何，我从来没有这样的错误，我真的很感激任何建议/解决方案，这里有什么问题，因为我现在还没有任何想法。 。

Here you find my CMakeLists.txt, headers, and main: http://pastie.org/8231509
As you can see, i tried a lot playing around with the CMakeLists and i am pretty sure that i have all headers my project requires. Anyways, i've never had such errors before and i really appreciate any suggestions/solutions about what's wrong here since i don't have any ideas left for now. Thx in advance.

推荐答案

您必须明确添加要链接到您的程序的系统库

You must explicitly add the system library for it to be linked into your program

find_package(Boost REQUIRED COMPONENTS system)
#                                      ^^^^^^ this :)

对于单独构建的其他Boost库（正则表达式，线程等）也必须这样做（请参阅此处）。

This must also be done for other Boost libraries that are built separately (regex, thread, etc.) (see here).

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