Blender ebuild and oneAPI intel graphic Card

[lastrodamo]

Recently I use an Intel graphic card on a gentoo installation.
I install the driver and oneAPI of the graphic card.

I also install

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dev-libs/level-zero

and

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dev-libs/intel-compute-runtime

The gentoo ebuild of blender do not have the possibility to use oneAPI in preferences. There is also no use flag of oneAPI available.
I install

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media-gfx/blender-bin

to have the possibility to check oneAPI and select the card in preferences.

After that I try to use cycles and I have an error:

oneAPI queue initialization error: got runtime exception "Hardware Raytracing is not available; please install "intel-level-zero-gpu-raytracing" to enable it or disable Embree GPU.

So I create an ebuild

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dev-libs/level-zero-gpu-raytracing

for gentoo for this package: https://codeberg.org/lastrodamo/gentoo- ... raytracing

After the installation 1.1.0 of this new ebuild, I open a binary of blender version 5.0.1 and I select Open Image Denoise inside blender in the viewport and launch a preview render and I have this error:

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cycles | ERROR The program was built for 1 devices
           | Build program log for 'Intel(R) Arc(TM) A770 Graphics':
           | error: ESIMD code detected, but VC not enabled in this build.

I'm searching about ESIMD and I found this article https://dl.acm.org/doi/10.1145/3624062.3624251

And I search about VC (Vector Compiler). Is there a possibility to have a use flag oneAPI on the default ebuild of gentoo?

[ilhooq]

Try to activate the vc use flag for the dev-util/intel-graphics-compiler package

[lastrodamo]

Thanks, I solved with compilation of dev-util/intel-graphics-compiler
But now I have this error :

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01:15.898  cycles           | ERROR OIDN error: The program was built for 1 devices
                            | Build program log for 'Intel(R) Arc(TM) A770 Graphics':
                            | bad spirv bitcode: spirv_read_verify: verify Module failed
                            | 
01:15.898  cycles           | ERROR The program was built for 1 devices
                            | Build program log for 'Intel(R) Arc(TM) A770 Graphics':
                            | bad spirv bitcode: spirv_read_verify: verify Module failed
                            | 
01:15.898  cycles           | ERROR Error running denoiser.

[lastrodamo]

I will create an ebuild to install IGC on version 2.27 who use an old version of LLVM 16
And force `intel-compute-runtime` to be compiled with LLVM-16