SDL3 and Windows XP

[gerwin]

There was mention of a major SDL 3 release. This one:

https://github.com/libsdl-org/SDL/releases/tag/release-3.2.0

So far, most open source games use SDL2. Which has a history of supporting Windows XP just fine. But this v3.2.0 unfortunately does not:

Two Windows XP incompatible calls in SDL3.dll (from package SDL3-3.2.0-win32-x86.zip):

kernel32.dll - SetWaitableTimerEx

kernel32.dll - CreateWaitableTimerExW

Any ideas?

Edited January 27 by gerwin

[Damnation]

Unless someone makes a kernelex for XP, it won't work.

[user57]

these timers are almost the same just with different names

[Andalu]

Kernel32.dll from the One Core Api project contains both functions. It needs the related libraries ntext.dll and kernelbase.dll.
It is not sure that it works but it is worth a try.

[gerwin]

Portable KernelEx is the most simple. I have not yet tried it though.

Preferably I build a version of SDL3 without these dependencies. I did build SDL2 before. But only when the API is stabilized.

Even better would be for the SDL3 team to add XP back as a supported platform, as it was for SDL2.

 

 

[gerwin]

I just noticed this:

https://wiki.libsdl.org/SDL3/README/windows
States: "All desktop Windows versions, back to Windows XP, are still supported."

So something is not as intended. Posted an issue here:

https://github.com/libsdl-org/SDL/issues/12128

EDIT: AND... FIXED (by Sam Lantinga)

Edited January 30 by gerwin

[Ant-The-Alchemist]

Good ol' Sam, he's on the ball. 

Hi all. @gerwin, I saw this issue posted on Github, and it got me curious about the XP compatibility. I'm only using VS2022, so it's all I know. I installed the XP toolset (v141_xp) and compiled using the supplied VS project in SDL3. It starts to compile, but breaks at `SDL_camera_mediafoundation.c` with ` error C2065: 'MFVideoPrimaries_BT2020': undeclared identifier`. Were you successful in building for XP after Sam's patch? Which toolchain did you use? Any idea what I'm missing?

[Ant-The-Alchemist]

Looking deeper into SDL3, I notice SDL_CAMERA_DRIVER_MEDIAFOUNDATION is always defined, even if SDL_CAMERA_DISABLED is defined. Would this be a problem with SDL not gating enough code with SDL_CAMERA_DISABLED? I don't understand CMAKE, but it looks like it'll only define SDL_CAMERA_DRIVER_MEDIAFOUNDATION if HAVE_CAMERA is TRUE?

[gerwin]

The last time I tried building SDL2 was: SDL2_v2-0-22 (25-04-2022) with MinGW 8, on actual Windows XP x86.

That worked fine.

I have not tried building SDL3 that way.

There is also a MinGW 10 build environment on that system, if need be. But I don't have any spare time in the two weeks to come, I need to travel...