PX4 CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
PX4编译出现错误:CMakeError:Thefollowingvariablesareusedinthisproject,buttheyaresettoNOTFOUND.PleasesetthemormakesuretheyaresetandtestedcorrectlyintheCMakefiles