From Rafa Gaitan and Jorge Izquierdo, build support for Android NDK.

"- In order to build against GLES1 we execute:
$ mkdir build_android_gles1
$ cd build_android_gles1
$ cmake .. -DOSG_BUILD_PLATFORM_ANDROID=ON -DDYNAMIC_OPENTHREADS=OFF
-DDYNAMIC_OPENSCENEGRAPH=OFF -DANDROID_NDK=<path_to_android_ndk>/
-DOSG_GLES1_AVAILABLE=ON -DOSG_GL1_AVAILABLE=OFF
-DOSG_GL2_AVAILABLE=OFF -DOSG_GL_DISPLAYLISTS_AVAILABLE=OFF -DJ=2
-DOSG_CPP_EXCEPTIONS_AVAILABLE=OFF
$ make
 If all is correct you will have and static OSG inside:
build_android_gles1/bin/ndk/local/armeabi.

- GLES2 is not tested/proved, but I think it could be possible build
it with the correct cmake flags.
- The flag -DJ=2 is used to pass to the ndk-build the number of
processors to speed up the building.
- make install is not yet supported."

src/osgQt/CMakeLists.txt

@@ -47,11 +47,19 @@ IF(CMAKE_COMPILER_IS_GNUCXX)
    STRING(REGEX REPLACE "-pedantic" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 ENDIF()
 
-SET(TARGET_LIBRARIES_VARS
-    QT_QTCORE_LIBRARY 
-    QT_QTGUI_LIBRARY
-    QT_QTOPENGL_LIBRARY
+SET(TARGET_LIBRARIES
+    ${TARGET_LIBRARIES}
+    ${QT_QTCORE_LIBRARY} 
+    ${QT_QTGUI_LIBRARY}
+    ${QT_QTOPENGL_LIBRARY}
 )
+
+# FIXME: This should work but something with the LINK_WITH_VARIABLES macro is not working
+#SET(TARGET_LIBRARIES_VARS
+#    QT_QTCORE_LIBRARY 
+#    QT_QTGUI_LIBRARY
+#    QT_QTOPENGL_LIBRARY
+#)
 INCLUDE_DIRECTORIES(${QT_INCLUDE_DIR} ${QT_QTCORE_INCLUDE_DIR})
 
 SETUP_LIBRARY(${LIB_NAME})