提示这个错误是什么原因啊 谁告诉我一下 谢谢

16:58:32 **** Incremental Build of configuration Default for project proj ****
“E:\android-ndk-r9c\android-ndk-r9c\ndk-build.cmd” all
Cannot run program “E:\android-ndk-r9c\android-ndk-r9c\ndk-build.cmd”: ???¨?

Error: Program “E:\android-ndk-r9c\android-ndk-r9c\ndk-build.cmd” not found in PATH
PATH=

16:58:32 Build Finished (took 58ms)