diff --git a/llvm-runtimes/openmp/Manifest b/llvm-runtimes/openmp/Manifest
index f2832ded55832..3b317fad201ea 100644
--- a/llvm-runtimes/openmp/Manifest
+++ b/llvm-runtimes/openmp/Manifest
@@ -11,5 +11,7 @@ DIST llvm-project-19.1.7.src.tar.xz 141249332 BLAKE2B 1259ed7f9aca7b35e89d818bef
 DIST llvm-project-19.1.7.src.tar.xz.sig 438 BLAKE2B 4015140f4ba77de45039bdbdfbaf6f30e75705123d067ea97175d91d7a5b6a75008df01d99ae7aa16aaa3b101f3f41e38d01f04158f95a261d617b3ede0254cd SHA512 195797b06ac80a742e0ccbc03a50dc06dd2e04377d783d5474e3e72c5a75203b60292b047929312a411d22b137a239943fba414a4d136a2be14cbff978eb6bda
 DIST llvm-project-20.1.7.src.tar.xz 147245448 BLAKE2B f7c57d1eba4e97e875b624dec3fb1b261a0203de7200366de5b3edcfbca2a170c41df46e91cd9cb78ae2af66120aef95334f5eb9628a1489e921c6bdf4cccfe8 SHA512 c2dbf6a468a8152409db7ff52902ecf8768a1d0328e386999f4f3672613903e1c10bddbba66b8553a6222952f8edb66266947f1fb21d0b09ae741e6249b6d1fa
 DIST llvm-project-20.1.7.src.tar.xz.sig 566 BLAKE2B 72ce2a18c211cfce9581a9e3e71f1c55cf18672aa355267581220e1a89e3327f9e16107970b69bb8f10f390baa5e286487bdc4cc0a7d9155ec13a4977cd3f472 SHA512 eff885059d547f57b98bda1fc9631f716ca6c650cd48203d9ed5443a6afb9a2d4d91d3f5c8618e307c0a44b3040bce61fdc6bce965073adc537655755d9f2112
+DIST llvm-project-20.1.8.src.tar.xz 147242952 BLAKE2B 7657ac0b26acc5affb1bfc91b912ade3191c5d77f3979d5a80d5f6ce52f56a7d1c448bd257398390bf10838f02faa6f3ece37a7327cced69d165ec2e2e699316 SHA512 f330e72e6a1da468569049437cc0ba7a41abb816ccece7367189344f7ebfef730f4788ac7af2bef0aa8a49341c15ab1d31e941ffa782f264d11fe0dc05470773
+DIST llvm-project-20.1.8.src.tar.xz.sig 566 BLAKE2B 85beedfcff1195a974fab2c667b9efd4b715b3480c1b44b1b887fe32c69f72aca0d3b8fb276c03b6cc5a866622f669047aeee5ccb976640b4008ccd31dce77a4 SHA512 d74369bdb4d1b82775161ea53c9c5f3a23ce810f4df5ff617123023f9d8ce720e7d6ecc9e17f8ebd39fd9e7a9de79560abdf2ffe73bcb907a43148d43665d619
 DIST llvm-project-814ac2e3735e52c1162ac495c24158e0ac256520.tar.gz 237400805 BLAKE2B 59cbf2f7f5c3c1c2c187c72a40b94b05b2d3286678f78764bc7555d75ead40d2fd60b1807bbe6470f012a5958d0466b1f6b2bc842bba36731e7697a79307532b SHA512 63f31f28b7f01b840d88bfa3ffc4107ccffc623b26c7d0dc3e720a864ce7ca907dcbdcfaec7e31a1711220528a89175334518711a83824c82389343c2e4008d7
 DIST llvm-project-e34e02128ec5eb89e36a8f0f7307dcbcfecabbee.tar.gz 238210997 BLAKE2B 80ce4689e3c71a413e36645cdc83590f3492ac3ee39b8bf8844ec50d0b68f40da4c19a7f284625e3550eb78a90d433e74092b5639bcebadf0e0220c36b111cb3 SHA512 5c1ab21b242d1ba62172ae6268a126fd1b049f85b039434b4ff28b0411ec60d46e96e05560b9b85d0420494afdd573b4043999cb34ace508a48f763d4eb5b7aa
diff --git a/llvm-runtimes/openmp/openmp-20.1.8.ebuild b/llvm-runtimes/openmp/openmp-20.1.8.ebuild
new file mode 100644
index 0000000000000..f3dd3189181c1
--- /dev/null
+++ b/llvm-runtimes/openmp/openmp-20.1.8.ebuild
@@ -0,0 +1,89 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} )
+inherit flag-o-matic cmake-multilib linux-info llvm.org python-single-r1
+
+DESCRIPTION="OpenMP runtime library for LLVM/clang compiler"
+HOMEPAGE="https://openmp.llvm.org"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0/${LLVM_SOABI}"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~mips ~ppc64 ~riscv ~x86 ~amd64-linux ~x64-macos"
+IUSE="debug gdb-plugin hwloc ompt test"
+REQUIRED_USE="
+	gdb-plugin? ( ${PYTHON_REQUIRED_USE} )
+"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	gdb-plugin? ( ${PYTHON_DEPS} )
+	hwloc? ( >=sys-apps/hwloc-2.5:0=[${MULTILIB_USEDEP}] )
+"
+# tests:
+# - dev-python/lit provides the test runner
+# - llvm-core/llvm provide test utils (e.g. FileCheck)
+# - llvm-core/clang provides the compiler to run tests
+DEPEND="
+	${RDEPEND}
+"
+BDEPEND="
+	dev-lang/perl
+	test? (
+		${PYTHON_DEPS}
+		$(python_gen_cond_dep '
+			dev-python/lit[${PYTHON_USEDEP}]
+		')
+		llvm-core/clang
+	)
+"
+
+LLVM_COMPONENTS=( openmp cmake llvm/include )
+llvm.org_set_globals
+
+pkg_setup() {
+	if use gdb-plugin || use test; then
+		python-single-r1_pkg_setup
+	fi
+}
+
+multilib_src_configure() {
+	# LTO causes issues in other packages building, #870127
+	filter-lto
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+
+	local libdir="$(get_libdir)"
+	local mycmakeargs=(
+		-DOPENMP_LIBDIR_SUFFIX="${libdir#lib}"
+
+		-DLIBOMP_USE_HWLOC=$(usex hwloc)
+		-DLIBOMP_OMPD_GDB_SUPPORT=$(multilib_native_usex gdb-plugin)
+		-DLIBOMP_OMPT_SUPPORT=$(usex ompt)
+
+		# do not install libgomp.so & libiomp5.so aliases
+		-DLIBOMP_INSTALL_ALIASES=OFF
+		# disable unnecessary hack copying stuff back to srcdir
+		-DLIBOMP_COPY_EXPORTS=OFF
+	)
+
+	use test && mycmakeargs+=(
+		# this project does not use standard LLVM cmake macros
+		-DOPENMP_LLVM_LIT_EXECUTABLE="${EPREFIX}/usr/bin/lit"
+		-DOPENMP_LIT_ARGS="$(get_lit_flags)"
+
+		-DOPENMP_TEST_C_COMPILER="$(type -P "${CHOST}-clang")"
+		-DOPENMP_TEST_CXX_COMPILER="$(type -P "${CHOST}-clang++")"
+	)
+	cmake_src_configure
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake_build check-libomp
+}