Policy CMP0046 is not set . 错误处理

编译cmd_vel_mux时候给出警告如下:

CMake Warning (dev) at yujin_ocs/yocs_cmd_vel_mux/CMakeLists.txt:31 (add_dependencies):
  Policy CMP0046 is not set: Error on non-existent dependency in
  add_dependencies.  Run "cmake --help-policy CMP0046" for policy details.
  Use the cmake_policy command to set the policy and suppress this warning.

  The dependency target "geometry_msgs_gencpp" of target
  "yocs_cmd_vel_mux_nodelet" does not exist.
This warning is for project developers.  Use -Wno-dev to suppress it.

解决办法:
在 CMakeLists.txt 文件中加入下面一行:

cmake_policy(SET CMP0046 OLD)

参考:
https://answers.ros.org/question/222139/how-to-disable-policy-cmp0045-is-not-set-warnings/

Make Error at oryxbot_cruise_ex/CMakeLists.txt:76 (add_executable): Cannot find source file: src/pid_controller.cpp Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp .hxx .in .txx CMake Warning (dev) at oryxbot_description/CMakeLists.txt:62 (add_dependencies): Policy CMP0046 is not set: Error on non-existent dependency in add_dependencies. Run "cmake --help-policy CMP0046" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The dependency target "swiftpro_control_generate_messages_cpp" of target "pose_swiftpro" does not exist. This warning is for project developers. Use -Wno-dev to suppress it. CMake Warning (dev) at oryxbot_description/CMakeLists.txt:63 (add_dependencies): Policy CMP0046 is not set: Error on non-existent dependency in add_dependencies. Run "cmake --help-policy CMP0046" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The dependency target "swiftpro_control_generate_messages_cpp" of target "pick_ar_gazebo" does not exist. This warning is for project developers. Use -Wno-dev to suppress it. CMake Warning (dev) at oryxbot_description/CMakeLists.txt:61 (add_dependencies): Policy CMP0046 is not set: Error on non-existent dependency in add_dependencies. Run "cmake --help-policy CMP0046" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The dependency target "swiftpro_control_generate_messages_cpp" of target "simple_picker" does not exist. This warning is for project developers. Use -Wno-dev to suppress it. CMake Warning (dev) at oryxbot_description/CMakeLists.txt:59 (add_dependencies): Policy CMP0046 is not set: Error on non-existent dependency in add_dependencies. Run "cmake --help-policy CMP0046" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The dependency target "swiftpro_control_generate_messages_cpp" of target "ik_swiftpro" does not exist. This warning is for project developers. Use -Wno-dev to suppress it. CMake Warning (dev) at oryxbot_description/CMakeLists.txt:58 (add_dependencies): Policy CMP0046 is not set: Error on non-existent dependency in add_dependencies. Run "cmake --help-policy CMP0046" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The dependency target "swiftpro_control_generate_messages_cpp" of target "fk_swiftpro" does not exist. This warning is for project developers. Use -Wno-dev to suppress it. CMake Warning (dev) at oryxbot_description/CMakeLists.txt:60 (add_dependencies): Policy CMP0046 is not set: Error on non-existent dependency in add_dependencies. Run "cmake --help-policy CMP0046" for policy details. Use the cmake_policy command to set the policy and suppress this warning. The dependency target "swiftpro_control_generate_messages_cpp" of target "home_pose" does not exist. This warning is for project developers. Use -Wno-dev to suppress it. CMake Error: CMake can not determine linker language for target: oryxbot_cruise_ex_node CMake Error: Cannot determine link language for target "oryxbot_cruise_ex_node". -- Generating done -- Build files have been written to: /home/bobac3/ros_workspace/build Makefile:2896: recipe for target 'cmake_check_build_system' failed make: *** [cmake_check_build_system] Error 1 Invoking "make cmake_check_build_system" failed
06-29
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