(报错)ROS2：WARNING:colcon.colcon_core.package_selection:ignoring unknown package

在使用colcon编译时，如果直接对所有包编译

colcon build

则不会有问题，但是针对单独某个包编译

colcon build --packages-select <pkg>

则报错

WARNING:colcon.colcon_core.package_selection:ignoring unknown package

gg了一下找到了问题

参考：https://unix.stackexchange.com/questions/616752/colcon-can-not-find-my-package

就是package.xml里面的包名错了(<name>那一行)

 

修改之后重新编译，又报错 

CMake Error at /opt/ros/foxy/share/ament_cmake_core/cmake/core/ament_package_xml.cmake:53 (message):
  ament_package_xml() package name 'pkg_tf_listener' in '/package.xml' does
  not match current PROJECT_NAME 'tf_listener'.  You must call project() with
  the same package name before.
Call Stack (most recent call first):
  /opt/ros/foxy/share/ament_lint_auto/cmake/ament_lint_auto_find_test_dependencies.cmake:31 (ament_package_xml)
  CMakeLists.txt:50 (ament_lint_auto_find_test_dependencies)

package.xml已经修改好，剩下就只能是cmakelists.txt的问题了，打开发现果然项目名还没同步改好

 修改好成功编译！