Cross-compile error: export libraries with absolute paths

[kaildy]

When cross-compile，error occured like this：

it seems export libraries with absolute paths（using /usr/include, /usr/lib, /opt/ros/jazzy/include, /opt/ros/jazzy/lib）in export_pcl_rosExport.cmake

file is： /opt/sysroot/opt/ros/jazzy/share/pcl_ros/cmake/export_pcl_rosExport.cmake，like this：

/opt/sysroot is the dir cross-compile toolchain dir，using this script can fix：

`cd /opt/sysroot/opt/ros/jazzy/share/pcl_ros/cmake
sudo cp export_pcl_rosExport.cmake export_pcl_rosExport.cmake.bk
sudo sed -i "s|/usr/include|/opt/sysroot/usr/include|g" export_pcl_rosExport.cmake
sudo sed -i "s|/usr/lib|/opt/sysroot/usr/lib|g" export_pcl_rosExport.cmake
sudo sed -i "s|/opt/ros/jazzy|/opt/sysroot/opt/ros/jazzy|g" export_pcl_rosExport.cmake

cd /opt/sysroot/opt/ros/jazzy/share/nav2_costmap_2d/cmake
sudo cp export_nav2_costmap_2dExport.cmake export_nav2_costmap_2dExport.cmake.bk
sudo sed -i "s|/usr/include|/opt/sysroot/usr/include|g" export_nav2_costmap_2dExport.cmake
sudo sed -i "s|/usr/lib|/opt/sysroot/usr/lib|g" export_nav2_costmap_2dExport.cmake
sudo sed -i "s|/opt/ros/jazzy|/opt/sysroot/opt/ros/jazzy|g" export_nav2_costmap_2dExport.cmake`

[Rayman]

What is exactly the bug in this repository? Can you send a PR so we can discuss in more detail?