undefined reference to YAML::LoadFile

Question

I\'m trying to use the new version of libyaml-cpp and having linker problems (undefined reference to \'YAML::LoadFile(std::basic_string

Answer 1

I have been struggling over this for the whole evening today. As I found no useful info anywhere in the internet, I post my results here:

Using OSX El Capitan with new versions of XCode (7.3) and CLang (Apple LLVM version 7.3.0 (clang-703.0.29) Using yaml-cpp 0.5.3

Things I did to make it work:

1. Obtain FindYamlCpp.cmake from the internet. Save it in /usr/local/share/cmake/Modules

2. Set CMakeFiles.txt to find Yaml-cpp

   # YAML with yaml-cpp
   SET(YAMLCPP_STATIC_LIBRARY TRUE)
   FIND_PACKAGE(YamlCpp)
   IF(YamlCpp_FOUND)
       MESSAGE("yaml-cpp Library FOUND: yaml-cpp related sources will be built.")
   ELSEIF(YamlCpp_FOUND)
       MESSAGE("yaml-cpp Library NOT FOUND!")
   ENDIF(YamlCpp_FOUND)
   

3. Add code to src/CmakeFiles.txt to use FindYamlCpp

       # Enable Yaml 
       IF(YAMLCPP_FOUND)
           ADD_EXECUTABLE(my_exec my_source.cpp)
       ENDIF(YAMLCPP_FOUND)
   

4. Using for example ccmake:

   1. set CMAKE_MODULE_PATH to /usr/local/share/cmake/Modules
   2. Set CMAKE_EXEC_LINKER_FLAGS to -lyaml-cpp