25.0.20
Description
Abstract
Suppress -Werror=unused-local-typedefs for traffic_simulator so the package
builds cleanly on ROS 2 Jazzy.
Background
GCC 13 (shipped with Jazzy) tightened -Wunused-local-typedefs so it now fires inside function templates when a particular instantiation does not use the typedef. This trips on lanelet2_core's signedDistanceImpl in /opt/ros/jazzy/include/lanelet2_core/geometry/impl/LineString.h:130, which declares using BasicPoint = PointT; without referencing it in some instantiations. Combined with this package's -Werror, building test_lanelet_wrapper_traffic_lights fails:
/opt/ros/jazzy/include/lanelet2_core/geometry/impl/LineString.h:130:9: error: typedef 'using BasicPoint = PointT' locally defined but not used [-Werror=unused-local-typedefs]
The same code compiled fine on Humble (GCC 11), which did not flag the typedef.
Details
Append -Wno-error=unused-local-typedefs to the existing add_compile_options line in simulation/traffic_simulator/CMakeLists.txt, mirroring the pattern already used for -Wno-error=class-memaccess (Eigen NEON memcpy on ARM). The warning still surfaces in build logs, but is no longer fatal.
The root cause is in an upstream system header, so demoting the warning to a non-fatal one on our side is the appropriate scope for this package.
References
autowarefoundation/autoware#7092 (comment)
Destructive Changes
none
Known Limitations
We might unintentionally ignore other unused-local-typedefs warnings for this package in the future.