Bug 953963 – media-libs/mesa[video_cards_nouveau] should check for rust[rustfmt] or rust-bin[rustfmt]

• Status: UNCONFIRMED
• Product: Gentoo Linux

[Description tkzv 2025-04-17 18:02:11 UTC]

In some cases media-libs/mesa needs rustfmt to build, otherwise it fails. I believe, the troubles started because of VIDEO_CARDS='nouveau', but I may be wrong. In this case Mesa should require dev-lang/rust[rustfmt] or dev-lang/rust-bin[rustfmt].

Observed for media-libs/mesa-24.3.4-r1 and media-libs/mesa-25.0.4, probably affects other versions too. The flags for Mesa, which build fails with dev-lang/rust[-rustfmt], but succeeds with dev-lang/rust[rustfmt] are: USE='X llvm opencl opengl osmesa proprietary-codecs vaapi vdpau vulkan wayland zstd', VIDEO_CARDS='nouveau nvk r600 radeon radeonsi zink'.

[Comment 1 Sam James 2025-04-17 18:07:05 UTC]

A build.log would be helpful. One may well argue that it shouldn't need a linting tool at all and we should instead stop it doing that.

[Comment 2 tkzv 2025-04-17 19:19:15 UTC]

Created attachment 925158 [details]
Log of the unsuccessful build

Compressed log of the unsuccessful build.

[Comment 3 Paul Zander 2025-04-19 20:40:25 UTC]

Pretty sure it's nvk that requires rust, not nouveau.

https://gitlab.freedesktop.org/mesa/mesa/-/blame/main/src/nouveau/headers/meson.build#L73
https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/meson.build?ref_type=heads#L755qq

[Comment 4 tkzv 2025-04-26 08:54:48 UTC]

Yes, both flags were present. If I understand correctly, nvk requires nouveau. I do not know, which of the two requires rustfmt.

Either way, it should set the flag automatically.

[Comment 5 Matt Turner 2025-05-15 16:28:04 UTC]

Filed https://gitlab.freedesktop.org/mesa/mesa/-/issues/13172 upstream.

[Comment 6 Matt Turner 2025-05-16 01:09:46 UTC]

Please give https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35008.patch a try