LINK_LIBRARIES: Targets may link only to libraries. CMake is dropping the item.

arackethis

于 2015-02-04 16:26:22 发布

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分类专栏： CMake学习笔记文章标签： matlab cmake

本文链接：https://blog.youkuaiyun.com/arackethis/article/details/43488021

在使用CMake时遇到错误'LINK_LIBRARIES: Targets may link only to libraries. CMake is dropping the item.'，原因是需要指定完整库文件路径。解决方法是将链接库改为具体的.so文件路径。

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编译项目时，用到external library (matlab，需要用到它的libeng.so和libmx.so库)，CMakeLists.txt中有这么一句：
LINK_LIBRARIES("/opt/MATLAB/R2012a/bin/glnxa64")
编译时会报如下警告和错误：

$ sudo make
-- Configuring done
WARNING: Target "myProject" requests linking to directory "/opt/MATLAB/R2012a/bin/glnxa64".  Targets may link only to libraries.  CMake is dropping the item.
-- Generating done
-- Build files have been written to: /opt/matlabEngine_example3_cmake
Linking CXX executable myProject
/usr/bin/ld: cannot find -leng
/usr/bin/ld: cannot find -lmx
collect2: ld returned 1 exit status
make[2]: *** [myProject] Error 1
make[1]: *** [CMakeFiles/myProject.dir/all] Error 2
make: *** [all] Error 2

错误提示很显然，找不到libeng.so和libmx.so库。搜索一下它们所在路径，就是在/opt/MATLAB/R2012a/bin/glnxa64目录下：