Some improvements for ARM systems with CMake.

CMakeLists.txt

···
 else (SDL_gpu_DISABLE_GLES)
 
 	if(ANDROID)
-		find_library( ANDROID_LOG_LIBRARY log )
-		find_library( ANDROID_GLES2_LIBRARY GLESv2 )
-		find_library( ANDROID_GLES1_LIBRARY GLESv1_CM )
+	
+		if (NOT SDL_gpu_DISABLE_GLES_1)
+			find_library( ANDROID_GLES1_LIBRARY GLESv1_CM )
+			link_libraries(
+				${ANDROID_GLES1_LIBRARY}
+			)
+		endif()
+		if (NOT SDL_gpu_DISABLE_GLES_2)
+			find_library( ANDROID_GLES2_LIBRARY GLESv2 )
+			link_libraries(
+				${ANDROID_GLES2_LIBRARY}
+			)
+		endif()
 		link_libraries(
 			${ANDROID_LOG_LIBRARY}
-			${ANDROID_GLES2_LIBRARY}
-			${ANDROID_GLES1_LIBRARY}
 		)
 	else()
 		find_package(OpenGLES REQUIRED)
···
 if(SDL_gpu_BUILD_TOOLS)
   add_subdirectory(tools)
 endif(SDL_gpu_BUILD_TOOLS)
+

scripts/FindOpenGLES.cmake

···
 SET( OPENGLES_FOUND "NO" )
 IF(OPENGLES_gl_LIBRARY)
 
-	SET( OPENGLES_LIBRARIES ${OPENGLES_gl_LIBRARY} ${OPENGLES_gl1_LIBRARY} ${OPENGLES_LIBRARIES})
+    IF(NOT OPENGLES_gl1_FOUND)
+	SET(OPENGLES_gl1_LIBRARY "")
+    ENDIF()
+
+    SET( OPENGLES_LIBRARIES ${OPENGLES_gl_LIBRARY} ${OPENGLES_gl1_LIBRARY} ${OPENGLES_LIBRARIES})
 
     SET( OPENGLES_FOUND "YES" )
 

src/CMakeLists.txt

···
 	endif(SDL_gpu_USE_SDL1)
 
 	if(SDL_gpu_BUILD_SHARED)
-		install(TARGETS SDL_gpu_shared EXPORT SDL_gpu-targets DESTINATION ${OUTPUT_DIR}/lib)
+		install(TARGETS SDL_gpu_shared EXPORT SDL_gpu-targets DESTINATION lib)
 	endif()
 	if(SDL_gpu_BUILD_STATIC)
-		install(TARGETS SDL_gpu EXPORT SDL_gpu-targets DESTINATION ${OUTPUT_DIR}/lib)
+		install(TARGETS SDL_gpu EXPORT SDL_gpu-targets DESTINATION lib)
 	endif()
 
 endif(SDL_gpu_INSTALL)