update

Controllers/Packages/robot_gazebo_plugins/steer_drive_controller/CMakeLists.txt

@@ -34,7 +34,10 @@ include_directories(
 )
 
 link_directories(${GAZEBO_LIBRARY_DIRS})
-list(APPEND CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GAZEBO_CXX_FLAGS}")
+# NOTE: CMAKE_CXX_FLAGS must remain a plain string. Using list(APPEND) turns it
+# into a semicolon-separated CMake list, which can break generated make rules
+# (e.g., shell treats `;` as a command separator).
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GAZEBO_CXX_FLAGS}")
 
 add_library(${PROJECT_NAME} src/steer_drive_controller.cpp src/odometry.cpp src/speed_limiter.cpp)
 target_link_libraries(${PROJECT_NAME} ${catkin_LIBRARIES} ${GAZEBO_LIBRARIES})