CMake FIND_PACKAGE 成功但返回错误的路径

问题描述

我正在尝试使用 CMakeLists.txt 中的以下代码将 CMake 2.8.6 链接到 boost::program_options

I'm trying to have CMake 2.8.6 link to boost::program_options using the following code in my CMakeLists.txt

FIND_PACKAGE(Boost COMPONENTS program_options REQUIRED)
INCLUDE_DIRECTORIES (${Boost_INCLUDE_DIR})

ADD_EXECUTABLE (segment segment.cpp)
TARGET_LINK_LIBRARIES (segment ${Boost_LIBRARIES})

find 命令似乎成功了，但将错误的目录传递给了链接器.包裹实际上在:

The find command seems to succeed but passes the wrong directory to the linker. The package is actually in:

`/usr/lib64/libboost_program_options-mt.so.5`

但是CMakeFiles/segment.dir/link.txt列出了以下内容:

/cm/shared/apps/gcc/4.4.6/bin/c++       CMakeFiles/segment.dir/segment.cpp.o  -o segment -rdynamic /usr/lib64/lib64/libboost_program_options-mt.so.5 -lpthread -lrt -Wl,-rpath,/usr/lib64/lib64

注意路径中额外的 lib64.此外，路径前面的 -l 标志似乎丢失了.

Note the extra lib64 in the path. Also, the -l flag in front of the path seems to be missing.

当运行 CMake 时，它​​报告它正确地找到了包，并且 {$Boost_LIBRARIES} 变量似乎列出了正确的库:

When running CMake it reports that it correctly finds the package, and the {$Boost_LIBRARIES} variable seems to list the correct libs:

Boost  found.
Found Boost components:
   program_options
${Boost_LIBRARIES} - optimized;boost_program_options-mt-shared;debug;boost_program_options-mt-shared-debug

生成的 CMakeCache.txt 文件以:

The generated CMakeCache.txt file starts with:

//The directory containing a CMake configuration file for Boost.
Boost_DIR:PATH=/usr/lib64/boost

//Boost include directory
Boost_INCLUDE_DIR:FILEPATH=/usr/include

这似乎是正确的.但是当运行 make 它使用上面link.txt中的路径时，我得到了错误:

Which seems to be correct. But when running make it uses the path in link.txt above and I get the error:

make[2]: *** No rule to make target `/usr/lib64/lib64/libboost_program_options-mt.so.5', needed by `segment'.  Stop.
make[1]: *** [CMakeFiles/segment.dir/all] Error 2
make: *** [all] Error 2

什么可能导致将子目录额外注入到路径中?什么可能导致以这种方式生成link.txt?我该如何解决(或解决它)?

What might cause this extra injection of a subdir into the path? What might cause link.txt to be generated in this way? And how do I fix it (or work around it)?

推荐答案

当使用一些旧版本的 boost 和 cmake-2.8.6-rc2 或更高版本时会出现这个问题，其中 boost 包发现代码已更改.

This problem occurs when using some older versions of boost with cmake-2.8.6-rc2 or later, where the boost package finding code was changed.

该问题可以通过在 cmake 命令行中指定 -DBoost_NO_BOOST_CMAKE=ON 来解决.

The problem can be worked around by specifying -DBoost_NO_BOOST_CMAKE=ON on the cmake command line.

引入这个问题的实际 commit 是 7da796d1fdd7cca07df733d010cd343f6f8787a9，可以是 在此处查看.

The actual commit where this problem is introduced is 7da796d1fdd7cca07df733d010cd343f6f8787a9, and can be viewed here.

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