libretro

[humbertodias]

Trying to run libretro core on steamdeck

─deck@steamdeck ~/repository/personal/Tilengine-libretro/lua_game ‹libretro●› 
╰─$ flatpak run org.libretro.RetroArch -L `pwd`/../lib/linux_x86_64/tilengine_libretro.so -v
F: Not sharing "/esp" with sandbox: Ignoring blocking autofs path "/esp"
[INFO] [Config]: Looking for config in: "/home/deck/.var/app/org.libretro.RetroArch/config/retroarch/retroarch.cfg".
[INFO] RetroArch 1.21.0 (Git 54af661d95)
[INFO] === Build =======================================
[INFO] CPU Model Name: AMD Custom APU 0405
[INFO] Capabilities: MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4 SSE42 AES AVX AVX2 
[INFO] Version: 1.21.0
[INFO] Git: 54af661d95
[INFO] Built: May  1 2025
[INFO] =================================================
[INFO] [Input]: Found input driver: "sdl2".
[INFO] [Core]: Loading dynamic libretro core from: "/home/deck/repository/personal/Tilengine-libretro/lua_game/../lib/linux_x86_64/tilengine_libretro.so"
[ERROR] Failed to load symbol: "retro_init"
[ERROR] Fatal error received in: "runloop_init_libretro_symbols()"
[INFO] [Core]: Content ran for a total of: 00 hours, 00 minutes, 00 seconds.
[INFO] [Core]: Unloading core symbols..

Am i missing something?

file ../lib/linux_x86_64/tilengine_libretro.so                                                                                               1 ↵
../lib/linux_x86_64/tilengine_libretro.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=30f09c2e2b442e56eafee07d80d9f4bf704e0cc3, not stripped

Thanks

[megamarc]

Hi!

I did this as an experimengt about 6 years ago and hasn't been maintained. I don't remember having tested it under Linux. "retro_init" is defined inside "src/libretro/libretro.c", in line 47. This module is the libretro driver itself.

Do you have a specific use case or just tinkering?

[humbertodias]

Yes. My idea is rewrite the https://github.com/humbertodias/lutro-brawler using tilengine + libretro
Do you think that would work?

[megamarc]

Seems cool. I see that Lutro has the same concept as tilengine_libretro: be an intermediate plugin between a libretro host like Retroarch, and a game written in Lua. I'll try to merge libretro_tilengine branch into the main, current branch, having its own build target instead of isolating it into a separate branch.

However be aware that I used luajit, not standard Lua. luajit has some unique features, like the ability to parse C headers directly to build the foreign function declarations. In source code I only see binaries for Windows, I guess I ether built them from source or downloaded prebuilt from somewhere. So a linux version may need extra work

[humbertodias]

Perfect, thanks.
I’m going to try to contribute.
Maybe this can help https://github.com/diekleinekuh/BennuGD_libretro

[humbertodias]

Created a PR #138 for that
Thanks