My AmigaOs4.1 projects

After other developers have already developed/ported great things for AmigaOS 4.1, I would also like to contribute something.

My first project is to port ScummVM 2026.1.0, which is very up-to-date, to AmigaOS 4.1. For the development environment, I am using Walkero's Docker images (Aos4-gcc11) on my MacStudio m4 Max.

@walkero

Thank you very much for providing this! It's great.

Okay, what did I do? First, I upgraded the SDK and added features: Warp3d/gles2/gl4es SDL2/2.32.8 and some libsdl stuff.

Here's a quick question: the SDK also provides clib4, but I don't know the current status. Should I update it to the latest version, and if so, where can I find everything?

ScummVM AmigaOS4 – Status 03/06/2026

## ✅ What works
- Build successful: ~39MB binary (stripped)
- 9 engines: titanic, wintermute, wme3d, agos, dreamweb, sherlock, sword25, stark, bladerunner
- GUI starts without errors
- Starship Titanic: **fully playable!**
- Bladerunner: **starts and runs** (somewhat slow, due to hardware)
- Alpha Polaris: **starts and runs** – but memory leak after 1-2 minutes (under investigation)
- Version string: **2026.1.1 “Like a Version” AmigaOS4.1** (clean, without Git hash)

There are still a few issues to resolve, but the build is currently making a favorable impression. OpenGL with shader support is functioning, and the first engines can be launched.

⚠️ Known limitations
- Bladerunner runs, but is somewhat slow (hardware-related, PPC 2.2GHz)
- Alpha Polaris: Memory leak after 1-2 minutes (under investigation)
- libz.so warnings during linking are harmless
- MSADPCM WAV warnings in the debug log are harmless
- make: gdate: No such file or directory → harmless
- Makefile.common warnings about duplicate dist target rules → harmless
- ppc-amigaos-strip section lma adjusted warnings → harmless
- AmigaOS4 Shell: no 2> operator (only > for stdout)

That's what I'll do next. The goal is to create a truly clean and error-free build for AmigaOS 4.1.

## 🔜 Possible next steps
- Diagnose and fix Alpha Polaris memory leak (evaluate RAM:surf.log)
- Remove PATCH 16 after diagnosis
- Test other engines (agos, sherlock, etc.)
- Test savegame functionality
- Prepare patch set for ScummVM upstream (PATCH 15 – genuine upstream bug)

And yes, I too have encountered many bugs and limitations within the SDK, the OpenGL SDK, and also the ScummVM code. But hey, that's the challenge.

Of course, AI/KI supported me here, and that's the only way I was able to get this far.

@Maijestro
Quote:To redirect stderr on AmigaOS you have to use "*>filename".

@joerg
Then how do you redirect stdout?

@balaton
<stdin >stdout *>stderr

@joerg
Oh, there's a star I did not notice. I think I never needed to redirect stderr on the Amiga so I did not know that.

@Maijestro

That's great & wsh you good luck

@Maijestro

Quote:

We are close to release a new version but in any case you can try development branch.
Regard the libraries needed by ScummVM I think you can find everything on OS4depot since the great mickjt84 now include also clib4 versions inside the updated packages

@afxgroup

AmigaOS4 Build Environment
===================================

Compiler
--------
GCC 11.5.0 (adtools build)

SDK
---
AmigaOS4 SDK 54.16 (August 2022)
execsg SDK 54.31 (August 2022)
dos SDK 54.120 (March 2022)

Libraries
---------
clib4 2.0.0 (August 16, 2025)
SDL2 2.30.1 (August 2025)
SDL2_ttf 2.x (August 2025)
SDL2_image 2.x (August 2025)
SDL2_mixer 2.x (August 2025)
SDL2_net 2.x (August 2025)
SDL2_gfx 1.0 (August 2025)
SDL2_gl4es 2.30 (August 2025)
FreeType 26.2.20 (August 2025)



This is my complete development environment. The SDK seems to be a bit older, and I probably need to update it and bring it up to date? Or it could be an error in the AI version check.

In any case, I built ScummVM completely using Clib4, and it's already working very well. Thank you for the great work on Clib4.

@Maijestro

Clib4 dev version
https://github.com/AmigaLabs/clib4/tree/development

SDL 2.32.8
https://os4depot.net/?function=showfile&file=library/misc/sdl2.lha

@Maijestro

Quote:
If you had installed update 3, which was released last October, you should have had SDK 54.17.

Best regards,

Niels

@maijestro

About the latest clib4, you can use the development branch, as others mentioned, and compile it yourself, or download the latest nightly build from https://github.com/AmigaLabs/clib4/releases/tag/nightly and copy the files inside the /opt/ppc-amigaos/ppc-amigaos/SDK folder

Thank you for using my docker images. I am glad that they are helpful.

@nbache

Quote:

He is using my docker images which still have the 54.16 SDK and not the updates coming with the update 3. Those will be included in a future update of my docker images.