[FFmpeg-user] ffmpeg0.10.2 crosscompile for Android-8, cygwin, ndk-r7c

[Gavin Kinsey]

On Wednesday 25 April 2012 09:38:34 roemer wrote:
> Hey there!
> 
> I'm really stuck in compiling ffmpeg0.10.2 for android. As the post title
> says, I'm currently trying to do so on Windows 7 with cygwin.
> 
> The problem is, that the compiler check in the configure script fails:
> 
> config.log:
> 
> BEGIN /tmp/ffconf.cyCUGQnr.c
>     1	int main(void){ return 0; }
> END /tmp/ffconf.cyCUGQnr.c
> /cygdrive/c/Android/android-ndk-r7c/toolchains/arm-linux-androideabi-4.4.
> 3/prebuilt/windows/bin/arm-linux-androideabi-gcc
> --sysroot=/cygdrive/c/Android/android-ndk-r7c/platforms/android-8/arch-a
> rm
> -I/cygdrive/c/Android/android-ndk-r7c/platforms/android-8/arch-arm/usr/i
> nclude -c -o /tmp/ffconf.ONaZN5TG.o /tmp/ffconf.cyCUGQnr.c
> arm-linux-androideabi-gcc.exe: /tmp/ffconf.cyCUGQnr.c: No such file or
> directory
> arm-linux-androideabi-gcc.exe: no input files
> C compiler test failed.
> 
> It seems like the test file is not created correctly, but I don't think
> that's a cygwin issue, because I had the same problems on Ubuntu.
> 
> and further more I geht the warning:
> WARNING:
> /cygdrive/c/Android/android-ndk-r7c/toolchains/arm-linux-androideabi-4.4.
> 3/prebuilt/windows/bin/arm-linux-androideabi-pkg-config not found,
> library detection may fail.
> 
> which appeared on Ubuntu too.

The pkg-config warning can be ignored.

The following configure flags work for android build on linux:
--disable-ffmpeg --disable-ffprobe --disable-ffserver --disable-avdevice --
disable-static --enable-shared --
sysroot=$ANDROID_NDK/platforms/android-5/arch-arm --arch=arm --target-
os=linux --cross-prefix=$ANDROID_NDK/toolchains/arm-linux-
androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi- --disable-
symver --cc='/usr/bin/ccache $ANDROID_NDK/toolchains/arm-linux-
androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc' --
disable-debug --enable-small

The --cc one is just to make rebuilds quicker, you can drop that.

-- 
Gavin Kinsey
AD Holdings Plc


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