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kichikuou 3e32da1d37 Add SDL3 support alongside SDL2

Add optional SDL3 support while keeping SDL2 as the default. SDL3 builds
must be selected explicitly with the SYSTEM3_SDL_VERSION CMake option.

Centralize most SDL2/SDL3 API differences behind compatibility interfaces.
Audio playback uses a dedicated SDL3 backend based on SDL3 audio streams,
implemented separately in mako_sdl3.cpp.

Android and Nintendo Switch remain on SDL2 for now.

2026-09-16 08:44:23 +09:00

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System3 for Switch

Build

Prerequisites:

CMake >=3.20
devkitPro environment (how to install)
Nintendo Switch development tools package (switch-dev)
SDL2 and SDL2_ttf Switch ports (switch-sdl2, switch-sdl2_ttf)

git submodule update --init
sudo (dkp-)pacman -S switch-dev switch-sdl2 switch-sdl2_ttf
mkdir -p out/debug
cd out/debug
/opt/devkitpro/portlibs/switch/bin/aarch64-none-elf-cmake \
  -DCMAKE_BUILD_TYPE=Debug -DSYSTEM3_SDL_VERSION=2 ../../
make

Use

Copy the resulting system3.nro file to a folder inside your Nintendo Switch's SD card (eg. /switch/[game name]/)
Copy all the game files, BGM files and configuration.
Open system3 through the Homebrew Launcher

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System3 for Switch

Build

Use

755 B

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