compile error

`[ 32%] Performing configure step for 'EP_ffmpeg' /Users/jml/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang 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 solve the problem. make[3]: *** [/Users/jml/gitCode/linphone-android/WORK/android-armv7/Stamp/EP_ffmpeg/EP_ffmpeg-configure] Error 1 make[2]: *** [CMakeFiles/EP_ffmpeg.dir/all] Error 2 make[1]: *** [all] Error 2 make: *** [armv7-build] Error 2`