diff --git a/llvm-core/libclc/Manifest b/llvm-core/libclc/Manifest
index 5648086cef42d..098cf82ec4f8a 100644
--- a/llvm-core/libclc/Manifest
+++ b/llvm-core/libclc/Manifest
@@ -16,4 +16,6 @@ DIST llvm-project-20.1.8.src.tar.xz 147242952 BLAKE2B 7657ac0b26acc5affb1bfc91b9
 DIST llvm-project-20.1.8.src.tar.xz.sig 566 BLAKE2B 85beedfcff1195a974fab2c667b9efd4b715b3480c1b44b1b887fe32c69f72aca0d3b8fb276c03b6cc5a866622f669047aeee5ccb976640b4008ccd31dce77a4 SHA512 d74369bdb4d1b82775161ea53c9c5f3a23ce810f4df5ff617123023f9d8ce720e7d6ecc9e17f8ebd39fd9e7a9de79560abdf2ffe73bcb907a43148d43665d619
 DIST llvm-project-21.1.0-rc1.src.tar.xz 158955624 BLAKE2B 6a33d48f41f92cd8731011678afdf4c6f6a4581af04483626c511d1c9410d62788eb660e05cdfe418085509b576c29eec5bb07ae7ddc993e9931287657c11e03 SHA512 7ab3d1bb49bd3c5c9c1490cd865fdef027c25d64bb7f6a2a16c11c311670d08b7a214323ae4781aa0f49973deb0039ebea9d04887089df8dedf65080acdfc871
 DIST llvm-project-21.1.0-rc1.src.tar.xz.sig 438 BLAKE2B d3736b7f4bb6133e542fb3f52d1b76acc2920558e61bbbeeec6e5b7639ca54e229803b27baa4aedd2134c11fb4439064ac36e90c8c1831a503dd1754efee8da6 SHA512 6b9565f270fae4e534a160916bbd01ccd0e1295bf17df13f3be05bed4f058c0e935ba7385aba74a195d3a13868d81f2a0cf4be966b216fc6d7b56002f33eb4a0
+DIST llvm-project-21.1.0-rc2.src.tar.xz 158947868 BLAKE2B 8de20b0bf5219de12240561c3049de09a3253e1ebe33f84533d3f1f2ee9794b09fe2b6aca0b2fb15542b37b901be7bd3e00306cfd266ab59e2703046bcbcaf3d SHA512 0599cbe3d11d9135c355d5c60fdfda98a9689768f41baba0b8981769cc836eba8d226364d601031413c5f43ae1c4dda080ab910d60c983367b438fa32903d173
+DIST llvm-project-21.1.0-rc2.src.tar.xz.sig 438 BLAKE2B 7090c7a98e01e7bf600e4fbb23ad28d2e3bd8e72938863b59c7be8be0de2e1b3e3e2a981955165b833a95992ee086fd525919af7bcd7761073800486b3be3363 SHA512 dbe6cdd544b84d18b51f187e612de8ec05eeb9f1b462b7c4921697aaf6c6b0a00a6f4d3cf320a61cf57a886f11d47049bb5fa817f8bf835991a01b5e4a2d8c0a
 DIST llvm-project-b956f049b186fafafebc88b861982644ec3f5291.tar.gz 243231046 BLAKE2B 473de217c29f168101976e0cd8b17f22c4a310c7f5bc7f8301a63d3abe1295fe75819178ff23bc22a475753cba097ef69042b0d40d1d9e3baef159aa9f8bea93 SHA512 0fb567ad5ea357c4aacfda4c256e78098017492a14998a409d4d5f5625384810a108420589ac22e700050fdd695bea870e64d18e7a6c8e8836a581aba263d40a
diff --git a/llvm-core/libclc/libclc-21.1.0_rc2.ebuild b/llvm-core/libclc/libclc-21.1.0_rc2.ebuild
new file mode 100644
index 0000000000000..366ce78aa7ede
--- /dev/null
+++ b/llvm-core/libclc/libclc-21.1.0_rc2.ebuild
@@ -0,0 +1,63 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+LLVM_COMPAT=( 21 )
+PYTHON_COMPAT=( python3_{11..14} )
+inherit cmake llvm.org llvm-r1 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 video_cards_nvidia video_cards_r600 video_cards_radeonsi"
+
+BDEPEND="
+	${PYTHON_DEPS}
+	$(llvm_gen_dep '
+		llvm-core/clang:${LLVM_SLOT}
+	')
+	spirv? ( dev-util/spirv-llvm-translator:* )
+"
+
+LLVM_COMPONENTS=( libclc )
+llvm.org_set_globals
+
+pkg_setup() {
+	llvm-r1_pkg_setup
+	python-any-r1_pkg_setup
+}
+
+src_configure() {
+	local libclc_targets=(
+		"clspv--"
+		"clspv64--"
+	)
+
+	use spirv && libclc_targets+=(
+		"spirv-mesa3d-"
+		"spirv64-mesa3d-"
+	)
+	use video_cards_nvidia && libclc_targets+=(
+		"nvptx--"
+		"nvptx64--"
+		"nvptx--nvidiacl"
+		"nvptx64--nvidiacl"
+	)
+	use video_cards_r600 && libclc_targets+=(
+		"r600--"
+	)
+	use video_cards_radeonsi && libclc_targets+=(
+		"amdgcn--"
+		"amdgcn-mesa-mesa3d"
+		"amdgcn--amdhsa"
+	)
+
+	libclc_targets=${libclc_targets[*]}
+	local mycmakeargs=(
+		-DLIBCLC_TARGETS_TO_BUILD="${libclc_targets// /;}"
+	)
+	cmake_src_configure
+}