howtobuild

- download OSG's pre-built 3rd party libraries for Android: http://www2.ai2.upv.es/difusion/osgAndroid/3rdpartyAndroid.zip
- run cmake in the OpenSceneGraph directory with the following command: 

cmake . -DOSG_BUILD_PLATFORM_ANDROID=ON -DDYNAMIC_OPENTHREADS=OFF -DDYNAMIC_OPENSCENEGRAPH=OFF -DOSG_GL1_AVAILABLE=OFF -DOSG_GL2_AVAILABLE=OFF -DOSG_GL3_AVAILABLE=OFF -DOSG_GLES1_AVAILABLE=OFF -DOSG_GLES2_AVAILABLE=ON -DOSG_GL_LIBRARY_STATIC=OFF -DOSG_GL_DISPLAYLISTS_AVAILABLE=OFF -DOSG_GL_MATRICES_AVAILABLE=OFF -DOSG_GL_VERTEX_FUNCS_AVAILABLE=OFF -DOSG_GL_VERTEX_ARRAY_FUNCS_AVAILABLE=OFF -DOSG_GL_FIXED_FUNCTION_AVAILABLE=OFF -DANDROID_ABI="armeabi armeabi-v7a" -DANDROID_PLATFORM=8 -DANDROID_STL="gnustl_static" -DJ=4

- make sure that libraries found by build environment are the ones built for Android and run make
- use ndk-build to compile each of osgEarth's 3rd party libraries
- run cmake in osgEarth's directory with the following command:

cmake . -DOSG_BUILD_PLATFORM_ANDROID=ON -DJ=4 -DOSG_DIR="./OpenSceneGraph" -DDYNAMIC_OSGEARTH=OFF -DOPENTHREADS_LIBRARY="./OpenSceneGraph/obj/local/armeabi/libOpenThreads.a" -DCURL_INCLUDE_DIR="./OpenSceneGraph/3rdparty/curl/include" -DCURL_LIBRARY="./OpenSceneGraph/3rdparty/build/curl/obj/local/armeabi/libcurl.a" -DGDAL_LIBRARY="./osgearthandroid/OpenSceneGraph/3rdparty/build/gdal/obj/local/armeabi/libgdal.a" -DGEOS_LIBRARY="./3rdparty/obj/local/armeabi/libgeos.a" -DSQLITE3_INCLUDE_DIR="./3rdparty/jni/sqlite-autoconf-3071401" -DSQLITE3_LIBRARY="./3rdparty/obj/local/armeabi/libsqlite3.a"

- make sure that libraries found by build environment are the ones built for Android and run make