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e977225937
Mark Callow README-android says to copy or link the SDL source tree to the jni folder in your Android project. It is not desirable to have to compile SDL with every application; furthermore the Android NDK has support for prebuilt libraries. Attached is script (to be put in build-scripts) that builds the Android version of the libraries. The script builds both the existing SDL2 module and a new SDL2_main module. This is a static library containing the code from src/main/android/SDL_android_main.c. Also attached is a patch for Android.mk adding this module. Note that when building an application's native .so using this prebuilt libSDL2main, you must use a link option, such as --whole-archive, that forces inclusion of the code in the .so because the functions in SDL_android_main are called only from Java.
75 lines
1.5 KiB
Bash
75 lines
1.5 KiB
Bash
#!/bin/sh
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#
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# Build the Android libraries without needing a project
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# (AndroidManifest.xml, jni/{Application,Android}.mk, etc.)
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#
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# Usage: androidbuildlibs.sh [arg for ndk-build ...]"
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#
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# Useful NDK arguments:
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#
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# NDK_DEBUG=1 - build debug version
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# NDK_LIBS_OUT=<dest> - specify alternate destination for installable
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# modules.
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#
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# Note that SDLmain is not an installable module (.so) so libSDLmain.a
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# can be found in $obj/local/<abi> along with the unstripped libSDL.so.
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#
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# Android.mk is in srcdir
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srcdir=`dirname $0`/..
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srcdir=`cd $srcdir && pwd`
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cd $srcdir
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#
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# Create the build directories
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#
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build=build
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buildandroid=$build/android
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obj=
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lib=
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ndk_args=
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# Allow an external caller to specify locations.
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for arg in $*
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do
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if [ "${arg:0:8}" == "NDK_OUT=" ]; then
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obj=${arg#NDK_OUT=}
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elif [ "${arg:0:13}" == "NDK_LIBS_OUT=" ]; then
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lib=${arg#NDK_LIBS_OUT=}
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else
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ndk_args="$ndk_args $arg"
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fi
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done
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if [ -z $obj ]; then
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obj=$buildandroid/obj
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fi
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if [ -z $lib ]; then
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lib=$buildandroid/lib
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fi
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for dir in $build $buildandroid $obj $lib; do
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if test -d $dir; then
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:
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else
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mkdir $dir || exit 1
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fi
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done
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# APP_* variables set in the environment here will not be seen by the
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# ndk-build makefile segments that use them, e.g., default-application.mk.
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# For consistency, pass all values on the command line.
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ndk-build \
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NDK_PROJECT_PATH=null \
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NDK_OUT=$obj \
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NDK_LIBS_OUT=$lib \
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APP_BUILD_SCRIPT=Android.mk \
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APP_ABI="all" \
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APP_PLATFORM=android-12 \
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APP_MODULES="SDL2 SDL2_main" \
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$ndk_args
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