Fixed bug 2146 - Enable static linking of libSDL on Android
authorSam Lantinga <slouken@libsdl.org>
Thu, 10 Oct 2013 21:51:39 -0700
changeset 7804 1f85fb33694b
parent 7803 97a1127629fb
child 7805 4f0f7b64afa5
Fixed bug 2146 - Enable static linking of libSDL on Android Denis Bernard This patch to Android.mk adds support for static linking of libSDL for Android applications. A patched readme with static build instructions is also provided. It does not break existing build environments setup according to the README-android.txt since the static library version will not be built in not required. The static build uses the Android NDK module system (see docs/IMPORT-MODULE.html in the NDK folder and step 5 in the instructions below). Instructions: 1. Copy the android-project directory wherever you want to keep your projects and rename it to the name of your project. 2. Create a symlink to SDL/src/main/android/SDL_android_main.c as <project>/jni/src/SDL_android_main.c 3. Rename <project>/jni/src/Android_static.mk to <project>/jni/src/Android.mk (overwrite the existing one) 4. Edit <project>/jni/src/Android.mk to include your source files 5. create and export an environment variable named NDK_MODULE_PATH that points to the parent directory of this SDL directory. e.g.: export NDK_MODULE_PATH="$PWD"/.. 6. Edit <project>/src/org/libsdl/app/SDLActivity.java and remove the call to System.loadLibrary("SDL2") line 42. 7. Run 'ndk-build' (a script provided by the NDK). This compiles the C source Although this requires an environment variable to be setup, it can be added once and for all to the main Android.mk of the project.
Android.mk
README-android.txt
android-project/jni/src/Android_static.mk
--- a/Android.mk	Thu Oct 10 21:50:25 2013 -0700
+++ b/Android.mk	Thu Oct 10 21:51:39 2013 -0700
@@ -49,3 +49,20 @@
 LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -llog -landroid
 
 include $(BUILD_SHARED_LIBRARY)
+
+###########################
+#
+# SDL static library
+#
+###########################
+
+LOCAL_MODULE := SDL2_static
+
+LOCAL_MODULE_FILENAME := libSDL2
+
+LOCAL_SRC_FILES += $(LOCAL_PATH)/src/main/android/SDL_android_main.c
+
+LOCAL_LDLIBS := 
+LOCAL_EXPORT_LDLIBS := -Wl,--undefined=Java_org_libsdl_app_SDLActivity_nativeInit -ldl -lGLESv1_CM -lGLESv2 -llog -landroid
+
+include $(BUILD_STATIC_LIBRARY)
--- a/README-android.txt	Thu Oct 10 21:50:25 2013 -0700
+++ b/README-android.txt	Thu Oct 10 21:51:39 2013 -0700
@@ -111,6 +111,28 @@
 
 
 ================================================================================
+ Build an app with static linking of libSDL
+================================================================================
+
+This build uses the Android NDK module system.
+
+Instructions:
+1. Copy the android-project directory wherever you want to keep your projects
+   and rename it to the name of your project.
+2. Rename <project>/jni/src/Android_static.mk to <project>/jni/src/Android.mk
+   (overwrite the existing one)
+3. Edit <project>/jni/src/Android.mk to include your source files
+4. create and export an environment variable named NDK_MODULE_PATH that points
+   to the parent directory of this SDL directory. e.g.:
+
+   export NDK_MODULE_PATH="$PWD"/..
+
+5. Edit <project>/src/org/libsdl/app/SDLActivity.java and remove the call to
+   System.loadLibrary("SDL2") line 42.
+6. Run 'ndk-build' (a script provided by the NDK). This compiles the C source
+
+
+================================================================================
  Customizing your application name
 ================================================================================
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/android-project/jni/src/Android_static.mk	Thu Oct 10 21:51:39 2013 -0700
@@ -0,0 +1,12 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := main
+
+LOCAL_SRC_FILES := YourSourceHere.c
+
+LOCAL_STATIC_LIBRARIES := SDL2_static
+
+include $(BUILD_SHARED_LIBRARY)
+$(call import-module,SDL)LOCAL_PATH := $(call my-dir)