diff --git a/llvm-runtimes/libclc/Manifest b/llvm-runtimes/libclc/Manifest
index f8e27754f422d..1db690e1cc4ef 100644
--- a/llvm-runtimes/libclc/Manifest
+++ b/llvm-runtimes/libclc/Manifest
@@ -13,4 +13,6 @@ DIST llvm-project-22.1.8.src.tar.xz 167061596 BLAKE2B 092204f62e0f0364a041c737eb
 DIST llvm-project-22.1.8.src.tar.xz.sig 119 BLAKE2B 2ce93472036e68782252991e4a8bdbeeec8706a56022220083a38a42ef18714a7894c41aaa04dc0d03f18601d8bfc1a5a030ed0ef0f0d64a662eae9843a4b362 SHA512 99a457b5b1fb409a5fe72b59ebd4ddae5cade3e5f2493e33b44d4f4b4625f7a1743f80106efb1134668842b15ea3400ce2c29263bec8ff986e05040910125e15
 DIST llvm-project-23.1.0-rc2.src.tar.xz 179079292 BLAKE2B 59b4ae719ca496b29e37c1150d2953062d00d696e847d16710b6719c63246cccfb50c6f6bf33e7723e2e3757c8b1cae51a3c6a6787b6d45c808c78902ac01c97 SHA512 9ca8d0aa34f2910abc06edb832831c1a66209e7e78cffabcc52113fe0d6d96af57f4f67788ae23026c0f3b91dc8f6224cb46dfa0f1bcc41a1f60cbad5ec1623d
 DIST llvm-project-23.1.0-rc2.src.tar.xz.sig 466 BLAKE2B c7acaa7f8833286cd0037c4c31ba8a1bb20f4a09b62979c7df9f69993728406b1a42db62d2ab2a34c526c0bdae1bc027074a623142420d2fc264c3f83e3c0f7b SHA512 7e2db57ed17efe3bf36c476049973b760af60c8a9302992a17e050e7a61db7b92df0b6c06f26989c61ce2e4682e7604bfdd0f063e322a726923e857890cedc8c
+DIST llvm-project-23.1.0-rc3.src.tar.xz 179126732 BLAKE2B f0843aacbf9ebd57929dbba0436773775dc121223ae3a81d1c30bd5a3ccba136359b9e483d2be58546dc6bf468743711d5057f8b1486e5ba4d59a96136426c3c SHA512 0c9bdf4c75784269bd4560d94126e667d1d145da2f6db4d94f437b2388880f3dcb52f85c0580d78e2597b141511a4b7ddadfc31f83b690d5cd383e84330ce247
+DIST llvm-project-23.1.0-rc3.src.tar.xz.sig 466 BLAKE2B c7bd61c1cab2bdb4c8026aa095f7543e7c2f50520531f3ca6bd8c0cb78b2a7770d39723cec6effe9366c260d01b0db2bfd072281790b63b7d0d8b48339f51c42 SHA512 751f602d29235d4ce58a0d38c23f360977cb9e978e04399b3032053e7168903a721d307f001864b73fef8f567023eebe8f4fdbf4124667789d0afaff57b01d7d
 DIST llvm-project-bb9934d4dfef9033ded36d26827dbb6d3ac1dd92.tar.gz 277566365 BLAKE2B 401320655d19b3d430d15a48e2daf1f00567ef87fd2d1f86c3d505a1b2f5920db6cbfa620bf1b0561cd318d6046830d5b19fe0e7b58647863372c6c96526526c SHA512 354b901ca80227abe6b0514eeba437f237ea2658dd1927bb6e1d3b0b298bdb0dfdb7855c0f359eea4977dd344f6d0f6d1ce486ea0100d4a5615a9139ef198fca
diff --git a/llvm-runtimes/libclc/libclc-23.1.0_rc3.ebuild b/llvm-runtimes/libclc/libclc-23.1.0_rc3.ebuild
new file mode 100644
index 0000000000000..7c429401a51e7
--- /dev/null
+++ b/llvm-runtimes/libclc/libclc-23.1.0_rc3.ebuild
@@ -0,0 +1,80 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{12..14} )
+inherit cmake llvm.org multibuild python-any-r1
+
+DESCRIPTION="OpenCL C library"
+HOMEPAGE="https://libclc.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( MIT BSD )"
+SLOT="0"
+IUSE="+spirv test video_cards_nvidia video_cards_radeonsi"
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	${PYTHON_DEPS}
+	llvm-core/clang:${LLVM_MAJOR}
+	spirv? (
+		>=dev-util/spirv-llvm-translator-23:*
+	)
+	test? (
+		$(python_gen_any_dep '
+			dev-python/lit[${PYTHON_USEDEP}]
+		')
+	)
+"
+
+LLVM_COMPONENTS=( libclc )
+llvm.org_set_globals
+
+src_configure() {
+	MULTIBUILD_VARIANTS=()
+
+	use spirv && MULTIBUILD_VARIANTS+=(
+		"spirv32-unknown-unknown"
+		"spirv64-unknown-unknown"
+		"spirv64-unknown-vulkan"  # formerly clspv
+	)
+	use video_cards_nvidia && MULTIBUILD_VARIANTS+=(
+		"nvptx64-nvidia-cuda"
+	)
+	use video_cards_radeonsi && MULTIBUILD_VARIANTS+=(
+		"amdgcn-amd-amdhsa-llvm"
+	)
+
+	multibuild_foreach_variant my_configure
+}
+
+my_configure() {
+	local mycmakeargs=(
+		-DLLVM_ROOT="${ESYSROOT}/usr/lib/llvm/${LLVM_MAJOR}"
+
+		-DCMAKE_CLC_COMPILER="$(type -P clang-${LLVM_MAJOR})"
+		-DLLVM_DEFAULT_TARGET_TRIPLE="${MULTIBUILD_VARIANT}"
+		-DLLVM_INCLUDE_TESTS="$(usex test)"
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	cmake_src_configure
+}
+
+src_compile() {
+	multibuild_foreach_variant cmake_src_compile
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	multibuild_foreach_variant cmake_build check-libclc
+}
+
+src_install() {
+	multibuild_foreach_variant cmake_src_install
+}