gcompris build env for android builds
Build the image:
docker build -t gcompris-build .
Run the image and attach to it:
docker run -it --entrypoint=/bin/bash gcompris-build -i
In container run the cmake wrapper from the build directory, make to compile and make apk_debug to build the apk file:
/opt/build/cmake.sh .. && make -j4 && make apk_debug