they really need to stop depending on older llvm and forcing AMDGPU target for everything

dev-util/mesa_clc/Manifest

@@ -1,3 +1,4 @@
 DIST mesa-25.2.3.tar.xz 43670524 BLAKE2B 1810c17e589f95f1e3b18f2562a0c193016a6b9aa260387d06b0750db7c1fb08e7ad1b2476caf79cde18fa919b320de2b12508228047e8ca3af13efb2046b3fe SHA512 e03c09de2a6482a87362c0bf4fab4f9b32ffa48935a8724eb83e75b246f1bfc59524d04ea7e8cbea34e5c6ad2a0793195a076fe2d27da8fb7e05f56c7662eac5
 DIST mesa-25.2.4.tar.xz 43697664 BLAKE2B 5f9e89efb11977c8d86f92e705280af7dc136f4031d192571518c6fb9d73eb31c269f383ac5c008bece15ccc522a9cdcde4522f60cb8a626bbd9949a25856c76 SHA512 ec74e1cc101b68ad2462399554273a9debb3d93a05c0a315cde3259b250d5828cbcef7771049b52beb01d07c34122fa5257451409b1d2b7fdcbf055c0f2c863d
 DIST mesa-25.2.5.tar.xz 43723176 BLAKE2B 375237d23918e09b7dab4f4abd2c3b24a046521d6e247043c5fbeb7d8a33d71471b23572d254f0ad489a2533094568ef6f067a57977a7ccc1805aa735c3f8b7d SHA512 29e61b5ecb467a706e3279c0e79ddd8d55109c08f7856d35c4042f518a70622fb19cdd208a82317654e0396835cb3117b756a96d9a0693bfa33730a50bbbd1d0
+DIST mesa-26.0.4.tar.xz 43887688 BLAKE2B f83f98bae3c06f893c551e9d33cc2b655b8b74e8f5a54db0ce4cebec1451ef0fc66263b006a2c205ef2c491da831ae037cacb09fa5364cfd2d95a6ae7b77048f SHA512 ddb59df633116a7ccd9d2d3a2e2009945909e3f774956efcbc032a2f963641cce50d0f319bebdc041df17700aa827aa2ccbc61c9e40b4020de9ff027eab27e23

dev-util/mesa_clc/mesa_clc-26.0.4.ebuild

@@ -0,0 +1,123 @@
+# Copyright 2023-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+LLVM_COMPAT=( {18..22} )
+PYTHON_COMPAT=( python3_{11..14} )
+
+inherit llvm-r1 meson python-any-r1
+
+MY_PV="${PV/_/-}"
+
+DESCRIPTION="mesa_clc tool used for building OpenCL C to SPIR-V"
+HOMEPAGE="https://mesa3d.org/"
+
+if [[ ${PV} == 9999 ]]; then
+	S="${WORKDIR}/mesa_clc-${MY_PV}"
+	EGIT_REPO_URI="https://gitlab.freedesktop.org/mesa/mesa.git"
+	inherit git-r3
+else
+	S="${WORKDIR}/mesa-${MY_PV}"
+	SRC_URI="https://archive.mesa3d.org/mesa-${MY_PV}.tar.xz"
+	KEYWORDS="~amd64 ~arm ~arm64 ~x86"
+fi
+
+LICENSE="MIT"
+SLOT="0"
+
+VIDEO_CARDS="asahi panfrost"
+for card in ${VIDEO_CARDS}; do
+	IUSE_VIDEO_CARDS+=" video_cards_${card}"
+done
+IUSE="${IUSE_VIDEO_CARDS} debug"
+
+RDEPEND="
+	dev-util/spirv-tools
+	$(llvm_gen_dep '
+		dev-util/spirv-llvm-translator:${LLVM_SLOT}
+		llvm-core/clang:${LLVM_SLOT}=
+		=llvm-core/libclc-${LLVM_SLOT}*
+		llvm-core/llvm:${LLVM_SLOT}=
+	')
+"
+DEPEND="${RDEPEND}
+	dev-libs/expat
+	>=virtual/zlib-1.2.8:=
+	x11-libs/libdrm
+"
+BDEPEND="
+	${PYTHON_DEPS}
+	$(python_gen_any_dep "
+		>=dev-python/mako-0.8.0[\${PYTHON_USEDEP}]
+		dev-python/packaging[\${PYTHON_USEDEP}]
+		dev-python/pyyaml[\${PYTHON_USEDEP}]
+	")
+	virtual/pkgconfig
+"
+
+python_check_deps() {
+	python_has_version -b ">=dev-python/mako-0.8.0[${PYTHON_USEDEP}]" &&
+	python_has_version -b "dev-python/packaging[${PYTHON_USEDEP}]" &&
+	python_has_version -b "dev-python/pyyaml[${PYTHON_USEDEP}]" || return 1
+}
+
+pkg_setup() {
+	llvm-r1_pkg_setup
+	python-any-r1_pkg_setup
+}
+
+src_configure() {
+	tools_enable video_cards_asahi asahi
+	tools_enable video_cards_panfrost panfrost
+
+	tools_list() {
+		local tools="$(sort -u <<< "${1// /$'\n'}")"
+		echo "${tools//$'\n'/,}"
+	}
+
+	PKG_CONFIG_PATH="$(get_llvm_prefix)/$(get_libdir)/pkgconfig"
+
+	use debug && EMESON_BUILDTYPE=debug
+
+	local emesonargs=(
+		-Dllvm=enabled
+		-Dshared-llvm=enabled
+		-Dmesa-clc=enabled
+		-Dinstall-mesa-clc=true
+		-Dprecomp-compiler=enabled
+		-Dinstall-precomp-compiler=true
+		-Dtools=$(tools_list "${TOOLS[*]}")
+
+		-Dgallium-drivers=''
+		-Dvulkan-drivers=''
+
+		# Set platforms empty to avoid the default "auto" setting. If
+		# platforms is empty meson.build will add surfaceless.
+		-Dplatforms=''
+
+		-Dglx=disabled
+		-Dlibunwind=disabled
+		-Dzstd=disabled
+
+		-Db_ndebug=$(usex debug false true)
+	)
+
+	meson_src_configure
+}
+
+src_install() {
+	dobin "${BUILD_DIR}"/src/compiler/clc/mesa_clc
+	dobin "${BUILD_DIR}"/src/compiler/spirv/vtn_bindgen2
+	use video_cards_asahi && dobin "${BUILD_DIR}"/src/asahi/clc/asahi_clc
+	use video_cards_panfrost && dobin "${BUILD_DIR}"/src/panfrost/clc/panfrost_compile
+}
+
+# $1 - VIDEO_CARDS flag (check skipped for "--")
+# other args - names of tools to enable
+tools_enable() {
+	if [[ $1 == -- ]] || use $1; then
+		shift
+		TOOLS+=("$@")
+	fi
+}

media-libs/mesa/Manifest

@@ -3,6 +3,7 @@ DIST mesa-25.2.2.tar.xz 43626716 BLAKE2B bed81e32c05ebff6f2a76bb14387882eed48556
 DIST mesa-25.2.3.tar.xz 43670524 BLAKE2B 1810c17e589f95f1e3b18f2562a0c193016a6b9aa260387d06b0750db7c1fb08e7ad1b2476caf79cde18fa919b320de2b12508228047e8ca3af13efb2046b3fe SHA512 e03c09de2a6482a87362c0bf4fab4f9b32ffa48935a8724eb83e75b246f1bfc59524d04ea7e8cbea34e5c6ad2a0793195a076fe2d27da8fb7e05f56c7662eac5
 DIST mesa-25.2.4.tar.xz 43697664 BLAKE2B 5f9e89efb11977c8d86f92e705280af7dc136f4031d192571518c6fb9d73eb31c269f383ac5c008bece15ccc522a9cdcde4522f60cb8a626bbd9949a25856c76 SHA512 ec74e1cc101b68ad2462399554273a9debb3d93a05c0a315cde3259b250d5828cbcef7771049b52beb01d07c34122fa5257451409b1d2b7fdcbf055c0f2c863d
 DIST mesa-25.2.5.tar.xz 43723176 BLAKE2B 375237d23918e09b7dab4f4abd2c3b24a046521d6e247043c5fbeb7d8a33d71471b23572d254f0ad489a2533094568ef6f067a57977a7ccc1805aa735c3f8b7d SHA512 29e61b5ecb467a706e3279c0e79ddd8d55109c08f7856d35c4042f518a70622fb19cdd208a82317654e0396835cb3117b756a96d9a0693bfa33730a50bbbd1d0
+DIST mesa-26.0.4.tar.xz 43887688 BLAKE2B f83f98bae3c06f893c551e9d33cc2b655b8b74e8f5a54db0ce4cebec1451ef0fc66263b006a2c205ef2c491da831ae037cacb09fa5364cfd2d95a6ae7b77048f SHA512 ddb59df633116a7ccd9d2d3a2e2009945909e3f774956efcbc032a2f963641cce50d0f319bebdc041df17700aa827aa2ccbc61c9e40b4020de9ff027eab27e23
 DIST paste-1.0.14.crate 18157 BLAKE2B 35e8548611c51ee75f4d04926149e5e54870d7073d9b635d550a6fa0f85891f57f326bdbcff3dd8618cf40f8e08cf903ef87d9c034d5921d8b91e1db842cdd7c SHA512 3a793f0e5e773a7f7defc798a4c17ae9a40d715144632ea6cb0a8c785e14c4212046491df016bb9838281f8eaf327a79f01c1e2ac5f26785c028bc880faff9ee
 DIST proc-macro2-1.0.86.crate 48958 BLAKE2B 4b89e07f23af8328dbb34fe2b3f1b202f1e6a3885a6269740a23359b41bb4099ac2484565d3b2b0936261689ca525785ac620c766997234fd8d0f409e80e5ea3 SHA512 1cdb7e22a35ae231d880c9420784c9acf97bda2db258b3d34aae5061dc1858449defe19a49e12c6a4173906aa72a4115059ac2db0fc760205fd2ab8b5b414434
 DIST quote-1.0.35.crate 28136 BLAKE2B 81424245e1e2b94459df68bb3a9a866c6a364102b5e1d010ede9c5f8278f8406d7b651957d091c5914e936b494b0f6e9a6a1dd8b7d35cd7d7100f86dee4ec12e SHA512 f5314fb6af17cf36c228e1970c569c29ec248954a450a5f90ba9e2896d04f74904c9cec5a1f74325f2489295a94491eee4ce8fb461e22cd4b34e53f1f881efd2

media-libs/mesa/mesa-26.0.4.ebuild

@@ -3,7 +3,7 @@
 
 EAPI=8
 
-LLVM_COMPAT=( {18..21} )
+LLVM_COMPAT=( {18..22} )
 LLVM_OPTIONAL=1
 CARGO_OPTIONAL=1
 PYTHON_COMPAT=( python3_{11..14} )