Undefined symbols for architecture for YAML::Node::Scalar() const in metadata_io.cpp.o

[tanzby]

Description

followed the steps of installing ros2 here: https://index.ros.org/doc/ros2/Installation/Dashing/OSX-Install-Binary/ and try to build rosbag2_storage

colcon build --symlink-install --packages-select rosbag2_storage

Note that yaml_cpp_vendor has already been setup up.

Expected Behavior

Build Package successfully.

Actual Behavior

➜  colcon build --symlink-install --packages-select rosbag2_storage
Starting >>> rosbag2_storage
--- stderr: rosbag2_storage                              
Undefined symbols for architecture x86_64:
  "YAML::detail::node_data::empty_scalar()", referenced from:
      YAML::Node::Scalar() const in metadata_io.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [librosbag2_storage.dylib] Error 1
make[1]: *** [CMakeFiles/rosbag2_storage.dir/all] Error 2
make: *** [all] Error 2
---
Failed   <<< rosbag2_storage	[ Exited with code 2 ]

Summary: 0 packages finished [12.0s]
  1 package failed: rosbag2_storage
  1 package had stderr output: rosbag2_storage

System

• OS: macOS 10.15.3
• ROS 2 Distro: Dashing
• Version: master branch

[tanzby]

I upgrade the yaml-cpp version in yaml_cpp_vendor to 0.6.3 by modifying CMakeLists.txt to the following:

ExternalProject_Add(yaml_cpp-9a36242
    URL https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-0.6.3.zip
    URL_MD5 e8a182537af663cc45228f7064b2021c
    TIMEOUT 600
    LOG_CONFIGURE ${should_log}
    LOG_BUILD ${should_log}
    CMAKE_ARGS
      -DCMAKE_INSTALL_PREFIX=${CMAKE_CURRENT_BINARY_DIR}/yaml_cpp_install
      ${extra_cmake_args}
      -Wno-dev
  )

Then I re-build yaml_cpp_vendor and rosbag2_storage. it works. Note that the original version of yaml_cpp_vendor has a yaml-cpp with version 0.6.1 and my macOS was installed with a 0.6.3 yaml-cpp by Homebrew. If the consistency of System's and yaml_cpp_vendor's dose the impact? e.g using a system's <yaml-cpp/yaml-cpp.hpp> but link with yaml_cpp_vendor's dylib.

[Karsten1987]

@tanzby this rather looks like an issue better suited for https://github.com/ros2/yaml_cpp_vendor, could that be? I am how rosbag2_storage could behave differently.

[Karsten1987]

I am closing this issue due to inactivity. @tanzby please feel free to re-open in case your problem still persists.