ROS .so载入undefined reference to `dlopen'问题

在ros下做libpcan导入是遇到`dlopen',`dlclose'等函数没有定义问题,查了好多资料,并没有解决,在google上搜索cmake dlopen后第一条就是解决方案。原文如下。

Suppose you get this error with the main.cpp file below:

 Linking CXX executable testlink
 CMakeFiles/testlink.dir/main.cpp.o: In function `main':
 main.cpp:(.text+0x1a): undefined reference to `dlopen'
 main.cpp:(.text+0x2a): undefined reference to `dlclose'
 collect2: ld returned 1 exit status
 make[2]: *** [testlink] Error 1
 make[1]: *** [CMakeFiles/testlink.dir/all] Error 2
 make: *** [all] Error 2

All you need to do is add ${CMAKE_DL_LIBS} to the target_link_libraries() call:

 target_link_libraries(testlink ${CMAKE_DL_LIBS})
将testlink换成你的源码名称即可,添加在包的CMakeList.txt,就是添加add_executabla(源码名 src/源码名.cpp)的位置

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