make px4_sitl_default gazebo
ninja: error: '../../src/modules/mavlink/mavlink/.git', needed by 'src/modules/mavlink/git_init__home_cm_PX4_Firmware_src_modules_mavlink_mavlink.stamp', missing and no known rule to make it
make: *** [Makefile:230:px4_sitl_default] 错误 1