Getting started with Lavapipe

[Dave Airlie]

On Fri, 9 Feb 2024 at 14:38, Ashwin Bhat <ashwin.bhat at autodesk.com> wrote:
>
> Hello,
>
> During  Vulkanised 2024 I was super excited to hear and learn about Lavapipe
> https://vulkan.org/user/pages/09.events/vulkanised-2024/Vulkanised-2024-faith-ekstrand-collabora-Iago-toral-igalia.pdf
>
> Are there some basic tutorials on how to get started with setting up Lavapipe swrast on Windows?
>
> I've installed LLVM and ensured it's in path. I have been trying to build using meson but haven't had much success. Any pointers appreciated. Please let me know if it's preferred to move this discussion/thread to issues.
>
> Here is the command I'm trying to run:
> meson setup -D llvm=true --prefix=%CD%/build/install build/  --buildtype=release -Dgallium-drivers=swrast -Dvulkan-drivers=swrast
>
> But I get this error:
> llvm-config found: NO need ['>= 5.0.0']
> Run-time dependency LLVM found: NO (tried cmake and config-tool)
> Looking for a fallback subproject for the dependency llvm (modules: bitwriter, engine, mcdisassembler, mcjit, core, executionengine, scalaropts, transformutils, instcombine, native)
> Building fallback subproject with default_library=static
>
> meson.build:1748:13: ERROR: Neither a subproject directory nor a llvm.wrap file was found.

I haven't used it on Windows in a long time, but there are prebuilds

https://github.com/pal1000/mesa-dist-win

They might also help start off but also figure out what is missing in
llvm builds.

Dave.