config.log보면

==============================================================================

WARNING: /cygdrive/c/my-android-toolchain/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
mktemp -u XXXXXX
Qtvy8u
check_ld cc
check_cc
BEGIN ffmpegtmp/ffconf.LROxlgCT.c
    1 int main(void){ return 0; }
END ffmpegtmp/ffconf.LROxlgCT.c
/cygdrive/c/my-android-toolchain/bin/arm-linux-androideabi-gcc -marm -march=armv7-a -mfloat-abi=softfp -mfpu=neon -c -o ffmpegtmp/ffconf.BJMffFhU.o ffmpegtmp/ffconf.LROxlgCT.c
arm-linux-androideabi-gcc.exe: CreateProcess: No such file or directory
C compiler test failed.

==============================================================================\

이렇게 뜨고요, cygwin에서 config.sh를 실행하면

$ ./config.sh
/cygdrive/c/my-android-toolchain/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.

==============================================================================\

이렇게 뜹니다.

환경은 Ndk r6 설치했구요, 윈도우7 입니다. 관리자권한으로 cygwin도 실행해 봤지만 역시 동일문쩨 발생하네요 뭐가문제인가요...