在cygwin中执行build_android.sh，生成错误
C:/android-ndk-r9c/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc is unable to create an executable file.
C compiler test failed.
If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.
build_android.sh: line 61: make: command not found
build_android.sh: line 62: make: command not found
build_android.sh: line 64: C:/android-ndk-r9c/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ar: No such file orirectory
build_android.sh: line 66: C:/android-ndk-r9c/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld: No such file orirectory
请帮助解决此类错误的方法