Add a vendored copy of SDL

vendored/sdl/android-project/app/jni/Android.mk

@@ -0,0 +1 @@
+include $(call all-subdir-makefiles)

vendored/sdl/android-project/app/jni/Application.mk

@@ -0,0 +1,10 @@
+
+# Uncomment this if you're using STL in your project
+# You can find more information here:
+# https://developer.android.com/ndk/guides/cpp-support
+# APP_STL := c++_shared
+
+APP_ABI := armeabi-v7a arm64-v8a x86 x86_64
+
+# Min runtime API level
+APP_PLATFORM=android-16

vendored/sdl/android-project/app/jni/CMakeLists.txt

@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 3.6)
+
+project(GAME)
+
+# armeabi-v7a requires cpufeatures library
+# include(AndroidNdkModules)
+# android_ndk_import_module_cpufeatures()
+
+
+# SDL sources are in a subfolder named "SDL"
+add_subdirectory(SDL)
+
+# Compilation of companion libraries
+#add_subdirectory(SDL_image)
+#add_subdirectory(SDL_mixer)
+#add_subdirectory(SDL_ttf)
+
+# Your game and its CMakeLists.txt are in a subfolder named "src"
+add_subdirectory(src)
+

vendored/sdl/android-project/app/jni/src/Android.mk

@@ -0,0 +1,18 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := main
+
+SDL_PATH := ../SDL
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/$(SDL_PATH)/include
+
+# Add your application source files here...
+LOCAL_SRC_FILES := YourSourceHere.c
+
+LOCAL_SHARED_LIBRARIES := SDL2
+
+LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -lOpenSLES -llog -landroid
+
+include $(BUILD_SHARED_LIBRARY)

vendored/sdl/android-project/app/jni/src/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.6)
+
+project(MY_APP)
+
+find_library(SDL2 SDL2)
+
+add_library(main SHARED)
+
+target_sources(main PRIVATE YourSourceHere.c)
+
+target_link_libraries(main SDL2)
+
+