rclc_examples 3.0.5 failing to build on ROS 2 build farm

[nuclearsandwich]

Since the rebuild on 2022-01-15 the rclc_examples package is no longer building.

• Package version: 3.0.5-1
• ROS 2 distribution: Rolling
• Platforms
  • Ubuntu AMD64
  • Ubuntu ARM64

Since previous builds of rclc_examples version 3.0.5-1 succeeded it is probable that this build failure is the result of changes in dependencies.

Here is an excerpt from the build log for the most recent AMD64 failure:

[100%] Linking C executable example_action_server
/usr/bin/cmake -E cmake_link_script CMakeFiles/example_action_server.dir/link.txt --verbose=1
/usr/lib/ccache/cc -g -O2 -fdebug-prefix-map=/tmp/binarydeb/ros-rolling-rclc-examples-3.0.5=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2   CMakeFiles/example_action_server.dir/src/example_action_server.c.o  -o example_action_server  -Wl,-rpath,/opt/ros/rolling/lib: /opt/ros/rolling/lib/librclc.so /opt/ros/rolling/lib/libexample_interfaces__rosidl_typesupport_introspection_c.so /opt/ros/rolling/lib/libexample_interfaces__rosidl_typesupport_introspection_cpp.so /opt/ros/rolling/lib/libexample_interfaces__rosidl_typesupport_cpp.so /opt/ros/rolling/lib/libexample_interfaces__rosidl_generator_py.so /opt/ros/rolling/lib/librcl_action.so /opt/ros/rolling/lib/librcl.so /opt/ros/rolling/lib/librcl_interfaces__rosidl_typesupport_introspection_c.so /opt/ros/rolling/lib/librcl_interfaces__rosidl_typesupport_introspection_cpp.so /opt/ros/rolling/lib/librcl_interfaces__rosidl_typesupport_cpp.so /opt/ros/rolling/lib/librcl_interfaces__rosidl_generator_py.so /opt/ros/rolling/lib/librcl_interfaces__rosidl_generator_c.so /opt/ros/rolling/lib/librcl_interfaces__rosidl_typesupport_c.so /opt/ros/rolling/lib/librcl_yaml_param_parser.so /opt/ros/rolling/lib/libyaml.so /opt/ros/rolling/lib/librmw_implementation.so /opt/ros/rolling/lib/librcl_logging_spdlog.so /opt/ros/rolling/lib/librcl_logging_interface.so /opt/ros/rolling/lib/libtracetools.so /opt/ros/rolling/lib/librmw.so /opt/ros/rolling/lib/librosidl_runtime_c.so /opt/ros/rolling/lib/libexample_interfaces__rosidl_generator_c.so /opt/ros/rolling/lib/libexample_interfaces__rosidl_typesupport_c.so /opt/ros/rolling/lib/libaction_msgs__rosidl_typesupport_introspection_c.so /opt/ros/rolling/lib/libaction_msgs__rosidl_typesupport_introspection_cpp.so /opt/ros/rolling/lib/libaction_msgs__rosidl_typesupport_cpp.so /opt/ros/rolling/lib/libaction_msgs__rosidl_generator_py.so /opt/ros/rolling/lib/libaction_msgs__rosidl_generator_c.so /opt/ros/rolling/lib/libaction_msgs__rosidl_typesupport_c.so /opt/ros/rolling/lib/libbuiltin_interfaces__rosidl_typesupport_introspection_c.so /opt/ros/rolling/lib/libbuiltin_interfaces__rosidl_typesupport_introspection_cpp.so /opt/ros/rolling/lib/libbuiltin_interfaces__rosidl_typesupport_cpp.so /opt/ros/rolling/lib/libunique_identifier_msgs__rosidl_typesupport_introspection_c.so /opt/ros/rolling/lib/libunique_identifier_msgs__rosidl_typesupport_introspection_cpp.so /opt/ros/rolling/lib/librosidl_typesupport_introspection_cpp.so /opt/ros/rolling/lib/librosidl_typesupport_introspection_c.so /opt/ros/rolling/lib/libunique_identifier_msgs__rosidl_typesupport_cpp.so /opt/ros/rolling/lib/librosidl_typesupport_cpp.so /opt/ros/rolling/lib/libbuiltin_interfaces__rosidl_generator_py.so /opt/ros/rolling/lib/libbuiltin_interfaces__rosidl_generator_c.so /opt/ros/rolling/lib/libbuiltin_interfaces__rosidl_typesupport_c.so /opt/ros/rolling/lib/libunique_identifier_msgs__rosidl_generator_py.so /opt/ros/rolling/lib/libunique_identifier_msgs__rosidl_generator_c.so /opt/ros/rolling/lib/libunique_identifier_msgs__rosidl_typesupport_c.so /opt/ros/rolling/lib/librosidl_typesupport_c.so /opt/ros/rolling/lib/librosidl_runtime_c.so /opt/ros/rolling/lib/librcpputils.so /opt/ros/rolling/lib/librcutils.so -ldl /usr/lib/x86_64-linux-gnu/libpython3.8.so -Wl,-rpath-link,/opt/ros/rolling/lib 
/usr/bin/ld: CMakeFiles/example_action_server.dir/src/example_action_server.c.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'
/usr/bin/ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[4]: *** [CMakeFiles/example_action_server.dir/build.make:136: example_action_server] Error 1
make[4]: Leaving directory '/tmp/binarydeb/ros-rolling-rclc-examples-3.0.5/obj-x86_64-linux-gnu'
make[3]: Leaving directory '/tmp/binarydeb/ros-rolling-rclc-examples-3.0.5/obj-x86_64-linux-gnu'
make[3]: *** [CMakeFiles/Makefile2:425: CMakeFiles/example_action_server.dir/all] Error 2
make[2]: *** [Makefile:144: all] Error 2

[Acuadros95]

I could not replicate this on our CI: #237
What are we missing @JanStaschulat ?

[JanStaschulat]

@nuclearsandwich @Acuadros95 I am not aware, that we made any changes to this package. The last commit or PR was in December 2021.

The error message

15:14:09 /usr/bin/ld: CMakeFiles/example_action_server.dir/src/example_action_server.c.o: undefined reference to symbol 'pthread_create@@GLIBC_2.17'

maybe is due to changes in some upstream dependencies?

See https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbuild.ros2.org%2Fjob%2FRbin_ufv8_uFv8__rclc_examples__ubuntu_focal_arm64__binary%2F154%2Fdisplay%2Fredirect&data=04%7C01%7Cjan.staschulat%40de.bosch.com%7C014725c5150f4e65296e08d9d87cbdce%7C0ae51e1907c84e4bbb6d648ee58410f4%7C0%7C0%7C637778852583973796%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=vNyWUwRW9EbrlsIuk5AcKg5uOcr5h%2BTbNdVIxB2q5zc%3D&reserved=0

[JanStaschulat]

created a new bloom release with a fix
ros/rosdistro#31917

[ros-discourse]

This issue has been mentioned on ROS Discourse. There might be relevant details there:

https://discourse.ros.org/t/preparing-for-final-rolling-sync-on-ubuntu-focal-2022-01-25/23920/3

[JanStaschulat]

PR merged.