Re: SDL2 vs SDL3 vs sdl-compat

On 2025-05-12 13:18, Bruce Dubbs wrote:
> I am in the process of updating SDL2 to version 2.32.6.
> 
> However the most current version of SDL is 3.2.12.  In the release 
> notes
> upstream says:
> 
> "The SDL development team is focusing efforts on SDL3 and making 
> sdl2-compat a drop-in replacement for SDL2. If you run into issues with 
> SDL2, please consider upgrading to SDL3 or trying out sdl2-compat. We 
> have made significant improvements across all platforms and your issue 
> may already be resolved."
> 
> We have a lot of packages that use SDL2 and sdl12-compat.  If someone 
> wants to volunteer to see what packages can use SDL3, we can decide 
> whether to move from SDL2 to SDL3.
> 
> The following packages currently use sdl12-compat:
> 
> multimedia/libdriv/gst10-plugins-bad.xml:
> multimedia/libdriv/libdv.xml:
> multimedia/libdriv/xine-lib.xml:
> multimedia/videoutils/vlc.xml:
> multimedia/libdriv/libmpeg2.xml:
> 
> The following packages use SDL2:
> 
> multimedia/videoutils/ffmpeg.xml:
> multimedia/videoutils/mpv.xml:
> multimedia/audioutils/mpg123.xml:
> multimedia/audioutils/audacious.xml:
> multimedia/libdriv/mlt.xml:
> multimedia/libdriv/v4l-utils.xml:
> multimedia/libdriv/pipewire.xml:
> multimedia/libdriv/gst10-plugins-base.xml:
> multimedia/libdriv/sdl.xml:
> general/graphlib/libwebp.xml:
> general/graphlib/gegl.xml:
> general/graphlib/libqrencode.xml:
> x/lib/qt6.xml:
> postlfs/virtualization/qemu.xml:
> 
> If some packages can use SDL3 and the rest can use sdl12-compat, we can
> upgrade from SDL2 to SDL3.  However we really do not want to have three
> different versions of SDL in the book.
> 
> In addition, there seems to be sdl12-compat at
> https://github.com/libsdl-org/sdl12-compat/releases and
> sdl2-compat at
> https://github.com/libsdl-org/sdl2-compat/releases/tag/release-2.32.56
> 
> The first one seems to be for compatibility between SDL1 and SDL2 and
> the second between SDL2 and SDL3.
> 
> Are there any volunteers to do the research into the best way to handle 
> this situation?
> 

Almost none of these packages natively support sdl3, looking at arch 
https://archlinux.org/packages/extra/x86_64/sdl3/ there is almost 
nothing that can use it. Arch only uses it for sdl2-compat because 
upstream is focusing on that and I think (if I remember a mailing list 
discussion correctly) it was to fix some graphical artifacting and 
performance issues with native sdl3. It could be useful for GLFS, but I 
don't see the point for blfs.

-- 
--Rahul

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