It seems that ament_auto_find_build_dependencies was not able to find pcl_conversions even if it is listed in the package.xml as <depend>pcl_conversions</depend>. Using find_package(pcl_conversions REQUIRED) solves the problem.
Didn't have the time to do extensive testing on this but let me know if you need more feedback.
It seems that
ament_auto_find_build_dependencieswas not able to findpcl_conversionseven if it is listed in thepackage.xmlas<depend>pcl_conversions</depend>. Usingfind_package(pcl_conversions REQUIRED)solves the problem.Didn't have the time to do extensive testing on this but let me know if you need more feedback.