安装百度语音包，roslaunch 出现错误[simple_speaker.launch] is neither a launch file in package [baidu_speech-indigo] nor is [baidu_speech-indigo] a launch file name
The traceback for the exception was written to the log file
终于找到解决方案，记录下。
找到语音包中的CMakeLists.txt，将图中的simple_voice复制，将百度语音包重命名为simple_voice，再重新在catkin_ws下catkin_make ,运行launch文件就可以了。