AetherSX2 Build Instructions
Please note that this is *not* a full source release for the library, only the LGPL sources, and parts of which that have been modified.
Releasing full source code is *not* required by the LGPL, only that the closed source components can be re-linked/combined with
the LGPL components and build instructions included as per section 4/5 of the license.
An apk suitable for injecting the recompiled library is provided as a convenience, as the library cannot be used outside
of the Android app without modification.
You will need:
- Android SDK, Build Tools and NDK. We use SDK 31, build-tools 31 and NDK 23.1.7779620.
- A Linux machine. We used Ubuntu 20.04.3 LTS.
- CMake 3.22.0. You can get this from the Kitware repository for Ubuntu distros.
You should have:
- app-release-unsigned.apk: Unsigned APK containing compiled Java code without native library.
- aethersx2-libemucore.tar.xz: Archive of source code.
We have verified that the library can be re-linked/reproduced on the above system configuration. If you use a different configuration,
it is not guaranteed to be functional.
Build steps:
1. Extract aethersx2-libemucore.tar.xz: tar xvf aethersx2-libemucore.tar.xz
2. Change into that directory: cd aethersx2
3. Create a build directory for the native library and change into it: mkdir build-android; cd build-android
4. Configure the build system. Change PATH_TO_NDK to whereever the NDK is installed: cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=/PATH_TO_NDK/build/cmake/android.toolchain.cmake -DANDROID_PLATFORM=android-26 -DANDROID_ABI=arm64-v8a ..
5. Compile the native library: make -j16 (or whatever CPU count you have)
6. Create a directory for packaging the APK: mkdir apk; cd apk
7. Copy the skeleton APK to this directory: cp PATH_TO_app-release-unsigned.apk aethersx2.apk
8. Copy the native library into the correct location: mkdir -p lib/arm64-v8a; cp ../pcsx2/libemucore.so lib/arm64-v8a
9. Add the native library to the APK. zip is used instead of aapt because aapt will compress it: zip -0 aethersx2.apk lib/arm64-v8a/libemucore.so
10. Ensure the native library is aligned to a 4-byte boundary: zipalign -p 4 aethersx2.apk aethersx2-aligned.apk
11. Create a signing key for your build. Mark down the keystore password. keytool -genkey -v -keystore keyname.keystore -alias keyname -keyalg RSA -keysize 2048 -validity 10000
11. Sign the APK, replacing PASSWORD_TO_KEYSTORE with above: apksigner sign --ks keyname.keystore --ks-pass "pass:PASSWORD_TO_KEYSTORE" --ks-key-alias keyname --out aethersx2-signed.apk --verbose aethersx2-aligned.apk
This will produce aethersx2-signed.apk, which can be installed on your device.
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