Merge updates from master

24 files changed, 2661 insertions, 64 deletions

diff --git a/dev-ml/llvm-ocaml/llvm-ocaml-13.0.0.9999.ebuild b/dev-ml/llvm-ocaml/llvm-ocaml-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..1e25f7546b82
--- /dev/null
+++ b/dev-ml/llvm-ocaml/llvm-ocaml-13.0.0.9999.ebuild
@@ -0,0 +1,124 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake llvm llvm.org python-any-r1
+
+DESCRIPTION="OCaml bindings for LLVM"
+HOMEPAGE="https://llvm.org/"
+
+# Keep in sync with sys-devel/llvm
+ALL_LLVM_EXPERIMENTAL_TARGETS=( ARC CSKY VE )
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM AVR BPF Hexagon Lanai Mips MSP430
+	NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore
+	"${ALL_LLVM_EXPERIMENTAL_TARGETS[@]}" )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0/${PV}"
+KEYWORDS=""
+IUSE="debug test ${ALL_LLVM_TARGETS[*]}"
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	>=dev-lang/ocaml-4.00.0:0=
+	dev-ml/ocaml-ctypes:=
+	~sys-devel/llvm-${PV}:=[debug?]
+	!sys-devel/llvm[ocaml(-)]"
+for x in "${ALL_LLVM_TARGETS[@]}"; do
+	RDEPEND+="
+		${x}? ( ~sys-devel/llvm-${PV}[${x}] )"
+done
+unset x
+
+DEPEND="${RDEPEND}"
+BDEPEND="
+	dev-lang/perl
+	dev-ml/findlib
+	>=dev-util/cmake-3.16
+	test? ( dev-ml/ounit )
+	${PYTHON_DEPS}"
+
+LLVM_COMPONENTS=( llvm )
+llvm.org_set_globals
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${PV%%.*} llvm_pkg_setup
+	python-any-r1_pkg_setup
+}
+
+src_configure() {
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DLLVM_BUILD_LLVM_DYLIB=ON
+		-DLLVM_LINK_LLVM_DYLIB=ON
+		-DLLVM_OCAML_OUT_OF_TREE=ON
+
+		# cheap hack: LLVM combines both anyway, and the only difference
+		# is that the former list is explicitly verified at cmake time
+		-DLLVM_TARGETS_TO_BUILD=""
+		-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+		-DLLVM_BUILD_TESTS=$(usex test)
+
+		# disable various irrelevant deps and settings
+		-DLLVM_ENABLE_FFI=OFF
+		-DLLVM_ENABLE_TERMINFO=OFF
+		-DHAVE_HISTEDIT_H=NO
+		-DLLVM_ENABLE_ASSERTIONS=$(usex debug)
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+
+		-DLLVM_HOST_TRIPLE="${CHOST}"
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+
+		# disable go bindings
+		-DGO_EXECUTABLE=GO_EXECUTABLE-NOTFOUND
+
+		# TODO: ocamldoc
+	)
+
+	use test && mycmakeargs+=(
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	# also: custom rules for OCaml do not work for CPPFLAGS
+	use debug || local -x CFLAGS="${CFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	local llvm_libdir=$(llvm-config --libdir)
+	# an ugly hack; TODO: figure out a way to pass -L to ocaml...
+	cd "${BUILD_DIR}/${libdir}" || die
+	ln -s "${llvm_libdir}"/*.so . || die
+
+	if use test; then
+		local llvm_bindir=$(llvm-config --bindir)
+		# Force using system-installed tools.
+		sed -i -e "/llvm_tools_dir/s@\".*\"@\"${llvm_bindir}\"@" \
+			"${BUILD_DIR}"/test/lit.site.cfg.py || die
+	fi
+}
+
+src_compile() {
+	cmake_build ocaml_all
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-llvm-bindings-ocaml
+}
+
+src_install() {
+	DESTDIR="${D}" \
+	cmake -P "${BUILD_DIR}"/bindings/ocaml/cmake_install.cmake || die
+
+	dodoc bindings/ocaml/README.txt
+}
diff --git a/dev-python/clang-python/clang-python-13.0.0.9999.ebuild b/dev-python/clang-python/clang-python-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..0e3b3ea06300
--- /dev/null
+++ b/dev-python/clang-python/clang-python-13.0.0.9999.ebuild
@@ -0,0 +1,41 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit llvm.org python-r1
+
+DESCRIPTION="Python bindings for sys-devel/clang"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE="test"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+RESTRICT="!test? ( test )"
+
+# The module is opening libclang.so directly, and doing some blasphemy
+# on top of it.
+RDEPEND="
+	>=sys-devel/clang-${PV}:*
+	!sys-devel/llvm:0[clang(-),python(-)]
+	!sys-devel/clang:0[python(-)]
+	${PYTHON_DEPS}"
+DEPEND="${RDEPEND}"
+
+LLVM_COMPONENTS=( clang/bindings/python )
+llvm.org_set_globals
+
+python_test() {
+	"${EPYTHON}" -m unittest discover -v || die "Tests fail with ${EPYTHON}"
+}
+
+src_test() {
+	python_foreach_impl python_test
+}
+
+src_install() {
+	python_foreach_impl python_domodule clang
+}
diff --git a/dev-python/lit/lit-13.0.0.9999.ebuild b/dev-python/lit/lit-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..cd8a5985d342
--- /dev/null
+++ b/dev-python/lit/lit-13.0.0.9999.ebuild
@@ -0,0 +1,40 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DISTUTILS_USE_SETUPTOOLS=rdepend
+PYTHON_COMPAT=( python3_{6..9} )
+
+inherit distutils-r1 llvm.org
+
+DESCRIPTION="A stand-alone install of the LLVM suite testing tool"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+# Tests require 'FileCheck' and 'not' utilities (from llvm)
+BDEPEND="
+	test? (
+		dev-python/psutil[${PYTHON_USEDEP}]
+		sys-devel/llvm )"
+
+LLVM_COMPONENTS=( llvm/utils/lit )
+llvm.org_set_globals
+
+# TODO: move the manpage generation here (from sys-devel/llvm)
+
+src_prepare() {
+	cd "${WORKDIR}" || die
+	distutils-r1_src_prepare
+}
+
+python_test() {
+	local -x LIT_PRESERVES_TMP=1
+	local litflags=$(get_lit_flags)
+	./lit.py ${litflags//;/ } tests || die
+}
diff --git a/dev-util/lldb/lldb-13.0.0.9999.ebuild b/dev-util/lldb/lldb-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..00b5d55d6be5
--- /dev/null
+++ b/dev-util/lldb/lldb-13.0.0.9999.ebuild
@@ -0,0 +1,100 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake llvm llvm.org python-single-r1 toolchain-funcs
+
+DESCRIPTION="The LLVM debugger"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE="libedit lzma ncurses +python test"
+REQUIRED_USE=${PYTHON_REQUIRED_USE}
+RESTRICT="test"
+
+RDEPEND="
+	libedit? ( dev-libs/libedit:0= )
+	lzma? ( app-arch/xz-utils:= )
+	ncurses? ( >=sys-libs/ncurses-5.9-r3:0= )
+	python? (
+		$(python_gen_cond_dep '
+			dev-python/six[${PYTHON_USEDEP}]
+		')
+		${PYTHON_DEPS}
+	)
+	~sys-devel/clang-${PV}[xml]
+	~sys-devel/llvm-${PV}
+	!<sys-devel/llvm-4.0"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	>=dev-util/cmake-3.16
+	python? ( >=dev-lang/swig-3.0.11 )
+	test? (
+		$(python_gen_cond_dep "
+			~dev-python/lit-${PV}[\${PYTHON_USEDEP}]
+			dev-python/psutil[\${PYTHON_USEDEP}]
+		")
+		sys-devel/lld
+	)
+	${PYTHON_DEPS}"
+
+LLVM_COMPONENTS=( lldb )
+LLVM_TEST_COMPONENTS=( llvm/lib/Testing/Support llvm/utils/unittest )
+llvm.org_set_globals
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${PV%%.*} llvm_pkg_setup
+	python-single-r1_pkg_setup
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DLLDB_ENABLE_CURSES=$(usex ncurses)
+		-DLLDB_ENABLE_LIBEDIT=$(usex libedit)
+		-DLLDB_ENABLE_PYTHON=$(usex python)
+		-DLLDB_ENABLE_LZMA=$(usex lzma)
+		-DLLDB_USE_SYSTEM_SIX=1
+		-DLLVM_ENABLE_TERMINFO=$(usex ncurses)
+
+		-DLLDB_INCLUDE_TESTS=$(usex test)
+
+		-DCLANG_LINK_CLANG_DYLIB=ON
+		# TODO: fix upstream to detect this properly
+		-DHAVE_LIBDL=ON
+		-DHAVE_LIBPTHREAD=ON
+
+		# normally we'd have to set LLVM_ENABLE_TERMINFO, HAVE_TERMINFO
+		# and TERMINFO_LIBS... so just force FindCurses.cmake to use
+		# ncurses with complete library set (including autodetection
+		# of -ltinfo)
+		-DCURSES_NEED_NCURSES=ON
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+	use test && mycmakeargs+=(
+		-DLLVM_BUILD_TESTS=$(usex test)
+		-DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	cmake_src_configure
+}
+
+src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-lldb-lit
+	# failures + hangs
+	#use python && cmake_build check-lldb
+}
+
+src_install() {
+	cmake_src_install
+	find "${D}" -name '*.a' -delete || die
+
+	use python && python_optimize
+}
diff --git a/eclass/distutils-r1.eclass b/eclass/distutils-r1.eclass
index 5ffc91be479c..c5c954f49250 100644
--- a/eclass/distutils-r1.eclass
+++ b/eclass/distutils-r1.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: distutils-r1.eclass
@@ -316,22 +316,25 @@ distutils_enable_sphinx() {
 	_DISTUTILS_SPHINX_PLUGINS=( "${@}" )
 
 	local deps autodoc=1 d
+	deps="dev-python/sphinx[\${PYTHON_USEDEP}]"
 	for d; do
 		if [[ ${d} == --no-autodoc ]]; then
 			autodoc=
 		else
 			deps+="
 				${d}[\${PYTHON_USEDEP}]"
+			if [[ ! ${autodoc} ]]; then
+				die "${FUNCNAME}: do not pass --no-autodoc if external plugins are used"
+			fi
 		fi
 	done
 
-	if [[ ! ${autodoc} && -n ${deps} ]]; then
-		die "${FUNCNAME}: do not pass --no-autodoc if external plugins are used"
-	fi
 	if [[ ${autodoc} ]]; then
-		deps="$(python_gen_any_dep "
-			dev-python/sphinx[\${PYTHON_USEDEP}]
-			${deps}")"
+		if [[ ${DISTUTILS_SINGLE_IMPL} ]]; then
+			deps="$(python_gen_cond_dep "${deps}")"
+		else
+			deps="$(python_gen_any_dep "${deps}")"
+		fi
 
 		python_check_deps() {
 			use doc || return 0
diff --git a/eclass/docs.eclass b/eclass/docs.eclass
index adacae4abda6..b67b268b7508 100644
--- a/eclass/docs.eclass
+++ b/eclass/docs.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: docs.eclass
@@ -10,20 +10,52 @@
 # @SUPPORTED_EAPIS: 6 7
 # @BLURB: A simple eclass to build documentation.
 # @DESCRIPTION:
-# A simple eclass providing functions to build documentation.
+# A simple eclass providing basic functions and variables to build
+# documentation.
 #
-# Please note that docs sets RDEPEND and DEPEND unconditionally
-# for you.
+# Please note that this eclass appends to RDEPEND and DEPEND
+# unconditionally for you.
 #
 # This eclass also appends "doc" to IUSE, and sets HTML_DOCS
-# to the location of the compiled documentation
+# to the location of the compiled documentation automatically,
+# 'einstalldocs' will then automatically install the documentation
+# to the correct directory.
 #
 # The aim of this eclass is to make it easy to add additional
-# doc builders. To do this, add a <DOCS_BUILDER>-deps and
-# <DOCS_BUILDER>-build function for your doc builder.
+# doc builders. To do this, add a <DOCS_BUILDER>_deps and
+# <DOCS_BUILDER>_compile function for your doc builder.
 # For python based doc builders you can use the
 # python_append_deps function to append [${PYTHON_USEDEP}]
 # automatically to additional dependencies.
+#
+# Example use doxygen:
+# @CODE
+# DOCS_BUILDER="doxygen"
+# DOCS_DEPEND="media-gfx/imagemagick"
+# DOCS_DIR="docs"
+#
+# inherit docs
+#
+# ...
+#
+# src_compile() {
+# 	default
+# 	docs_compile
+# }
+# @CODE
+#
+# Example use mkdocs with distutils-r1:
+# @CODE
+# DOCS_BUILDER="mkdocs"
+# DOCS_DEPEND="dev-python/mkdocs-material"
+# DOCS_DIR="doc"
+#
+# PYTHON_COMPAT=( python3_{7,8,9} )
+#
+# inherit distutils-r1 docs
+#
+# ...
+# @CODE
 
 case "${EAPI:-0}" in
 	0|1|2|3|4|5)
@@ -50,41 +82,54 @@ esac
 # Path containing the doc builder config file(s).
 #
 # For sphinx this is the location of "conf.py"
-# For mkdocs this is the location of "mkdocs.yml"
 #
+# For mkdocs this is the location of "mkdocs.yml"
 # Note that mkdocs.yml often does not reside
 # in the same directory as the actual doc files
 #
+# For doxygen the default name is Doxyfile, but
+# package may use a non-standard name. If this
+# is the case one should set DOCS_CONFIG_NAME to
+# the correct name
+#
 # Defaults to ${S}
 
 # @ECLASS-VARIABLE: DOCS_DEPEND
 # @DEFAULT_UNSET
 # @PRE_INHERIT
 # @DESCRIPTION:
-# Sets additional dependencies to build docs.
+# Sets additional dependencies required to build the
+# documentation.
 # For sphinx and mkdocs these dependencies should
-# be specified without [${PYTHON_USEDEP}], this
+# be specified *without* [${PYTHON_USEDEP}], this
 # is added by the eclass. E.g. to depend on mkdocs-material:
 #
+# @CODE
 # DOCS_DEPEND="dev-python/mkdocs-material"
+# @CODE
 #
-# This eclass appends to this variable, so you can
-# call it later in your ebuild again if necessary.
+# This eclass appends to this variable, this makes it
+# possible to call it later in your ebuild again if
+# necessary.
 
 # @ECLASS-VARIABLE: DOCS_AUTODOC
 # @PRE_INHERIT
 # @DESCRIPTION:
 # Sets whether to use sphinx.ext.autodoc/mkautodoc
-# Defaults to 1 (True) for sphinx, and 0 (False) for mkdocs
+# Defaults to 1 (True) for sphinx, and 0 (False) for mkdocs.
+# Not relevant for doxygen.
 
 # @ECLASS-VARIABLE: DOCS_OUTDIR
 # @DESCRIPTION:
-# Sets where the compiled files will be put.
-# There's no real reason to change this, but this
-# variable is useful if you want to overwrite the HTML_DOCS
-# added by this eclass. E.g.:
+# Sets the directory where the documentation should
+# be built into. There is no real reason to change this.
+# However, this variable is useful if the package should
+# also install other HTML files.
 #
+# Example use:
+# @CODE
 # HTML_DOCS=( "${yourdocs}" "${DOCS_OUTDIR}/." )
+# @CODE
 #
 # Defaults to ${S}/_build/html
 
@@ -93,18 +138,19 @@ esac
 # Name of the doc builder config file.
 #
 # Only relevant for doxygen, as it allows
-# config files with non-standard names
+# config files with non-standard names.
+# Does not do anything for mkdocs or sphinx.
 #
 # Defaults to Doxyfile for doxygen
 
 if [[ ! ${_DOCS} ]]; then
 
-# For the python based DOCS_BUILDERS we need to inherit python-any-r1
+# For the python based DOCS_BUILDERS we need to inherit any python eclass
 case ${DOCS_BUILDER} in
 	"sphinx"|"mkdocs")
 		# We need the python_gen_any_dep function
-		if [[ ! ${_PYTHON_R1} && ! ${_PYTHON_ANY_R1} ]]; then
-			die "python-r1 or python-any-r1 needs to be inherited as well to use python based documentation builders"
+		if [[ ! ${_PYTHON_R1} && ! ${_PYTHON_ANY_R1} && ! ${_PYTHON_SINGLE_R1} ]]; then
+			die "distutils-r1, python-r1, python-single-r1 or python-any-r1 needs to be inherited to use python based documentation builders"
 		fi
 		;;
 	"doxygen")
@@ -119,6 +165,7 @@ case ${DOCS_BUILDER} in
 esac
 
 # @FUNCTION: python_append_dep
+# @INTERNAL
 # @DESCRIPTION:
 # Appends [\${PYTHON_USEDEP}] to all dependencies
 # for python based DOCS_BUILDERs such as mkdocs or
@@ -135,6 +182,7 @@ python_append_deps() {
 }
 
 # @FUNCTION: sphinx_deps
+# @INTERNAL
 # @DESCRIPTION:
 # Sets dependencies for sphinx
 sphinx_deps() {
@@ -142,28 +190,29 @@ sphinx_deps() {
 
 	: ${DOCS_AUTODOC:=1}
 
+	deps="dev-python/sphinx[\${PYTHON_USEDEP}]
+			${DOCS_DEPEND}"
 	if [[ ${DOCS_AUTODOC} == 0 ]]; then
 		if [[ -n "${DOCS_DEPEND}" ]]; then
 			die "${FUNCNAME}: do not set DOCS_AUTODOC to 0 if external plugins are used"
-		else
-			DOCS_DEPEND="$(python_gen_any_dep "
-			dev-python/sphinx[\${PYTHON_USEDEP}]")"
 		fi
-	elif [[ ${DOCS_AUTODOC} == 1 ]]; then
-		DOCS_DEPEND="$(python_gen_any_dep "
-			dev-python/sphinx[\${PYTHON_USEDEP}]
-			${DOCS_DEPEND}")"
-	else
+	elif [[ ${DOCS_AUTODOC} != 0 && ${DOCS_AUTODOC} != 1 ]]; then
 		die "${FUNCNAME}: DOCS_AUTODOC should be set to 0 or 1"
 	fi
+	if [[ ${_PYTHON_SINGLE_R1} ]]; then
+		DOCS_DEPEND="$(python_gen_cond_dep "${deps}")"
+	else
+		DOCS_DEPEND="$(python_gen_any_dep "${deps}")"
+	fi
 }
 
 # @FUNCTION: sphinx_compile
+# @INTERNAL
 # @DESCRIPTION:
 # Calls sphinx to build docs.
 #
-# If you overwrite src_compile or python_compile_all
-# do not call this function, call docs_compile instead
+# If you overwrite python_compile_all do not call
+# this function, call docs_compile instead
 sphinx_compile() {
 	debug-print-function ${FUNCNAME}
 	use doc || return
@@ -190,6 +239,7 @@ sphinx_compile() {
 }
 
 # @FUNCTION: mkdocs_deps
+# @INTERNAL
 # @DESCRIPTION:
 # Sets dependencies for mkdocs
 mkdocs_deps() {
@@ -197,26 +247,28 @@ mkdocs_deps() {
 
 	: ${DOCS_AUTODOC:=0}
 
+	deps="dev-python/mkdocs[\${PYTHON_USEDEP}]
+			${DOCS_DEPEND}"
 	if [[ ${DOCS_AUTODOC} == 1 ]]; then
-		DOCS_DEPEND="$(python_gen_any_dep "
-			dev-python/mkdocs[\${PYTHON_USEDEP}]
-			dev-python/mkautodoc[\${PYTHON_USEDEP}]
-		${DOCS_DEPEND}")"
-	elif [[ ${DOCS_AUTODOC} == 0 ]]; then
-		DOCS_DEPEND="$(python_gen_any_dep "
-			dev-python/mkdocs[\${PYTHON_USEDEP}]
-			${DOCS_DEPEND}")"
-	else
+		deps="dev-python/mkautodoc[\${PYTHON_USEDEP}]
+				${deps}"
+	elif [[ ${DOCS_AUTODOC} != 0 && ${DOCS_AUTODOC} != 1 ]]; then
 		die "${FUNCNAME}: DOCS_AUTODOC should be set to 0 or 1"
 	fi
+	if [[ ${_PYTHON_SINGLE_R1} ]]; then
+		DOCS_DEPEND="$(python_gen_cond_dep "${deps}")"
+	else
+		DOCS_DEPEND="$(python_gen_any_dep "${deps}")"
+	fi
 }
 
 # @FUNCTION: mkdocs_compile
+# @INTERNAL
 # @DESCRIPTION:
 # Calls mkdocs to build docs.
 #
-# If you overwrite src_compile or python_compile_all
-# do not call this function, call docs_compile instead
+# If you overwrite python_compile_all do not call
+# this function, call docs_compile instead
 mkdocs_compile() {
 	debug-print-function ${FUNCNAME}
 	use doc || return
@@ -236,6 +288,7 @@ mkdocs_compile() {
 }
 
 # @FUNCTION: doxygen_deps
+# @INTERNAL
 # @DESCRIPTION:
 # Sets dependencies for doxygen
 doxygen_deps() {
@@ -246,11 +299,9 @@ doxygen_deps() {
 }
 
 # @FUNCTION: doxygen_compile
+# @INTERNAL
 # @DESCRIPTION:
 # Calls doxygen to build docs.
-#
-# If you overwrite src_compile or python_compile_all
-# do not call this function, call docs_compile instead
 doxygen_compile() {
 	debug-print-function ${FUNCNAME}
 	use doc || return
@@ -273,12 +324,21 @@ doxygen_compile() {
 # @DESCRIPTION:
 # Calls DOCS_BUILDER and sets HTML_DOCS
 #
-# This function must be called in global scope.  Take care not to
-# overwrite the variables set by it. Has support for distutils-r1
-# eclass, but only if this eclass is inherited *after*
-# distutils-r1. If you need to extend src_compile() or
-# python_compile_all(), you can call the original implementation
-# as docs_compile.
+# This function must be called in src_compile. Take care not to
+# overwrite the variables set by it. If distutils-r1 is inherited
+# *before* this eclass, than docs_compile will be automatically
+# added to python_compile_all() and there is no need to call
+# it manually. Note that this function checks if USE="doc" is
+# enabled, and if not automatically exits. Therefore, there is
+# no need to wrap this function in a if statement.
+#
+# Example use:
+# @CODE
+# src_compile() {
+# 	default
+# 	docs_compile
+# }
+# @CODE
 docs_compile() {
 	debug-print-function ${FUNCNAME}
 	use doc || return
diff --git a/eclass/llvm.org.eclass b/eclass/llvm.org.eclass
index c6f4d2a56c11..e532c953cb70 100644
--- a/eclass/llvm.org.eclass
+++ b/eclass/llvm.org.eclass
@@ -1,4 +1,4 @@
-# Copyright 2019-2020 Gentoo Authors
+# Copyright 2019-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: llvm.org.eclass
@@ -44,7 +44,7 @@ esac
 # @DESCRIPTION:
 # The major version of current LLVM trunk.  Used to determine
 # the correct branch to use.
-_LLVM_MASTER_MAJOR=12
+_LLVM_MASTER_MAJOR=13
 
 # @ECLASS-VARIABLE: _LLVM_SOURCE_TYPE
 # @INTERNAL
diff --git a/sys-devel/clang-common/clang-common-13.0.0.9999.ebuild b/sys-devel/clang-common/clang-common-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..03e4441b91b9
--- /dev/null
+++ b/sys-devel/clang-common/clang-common-13.0.0.9999.ebuild
@@ -0,0 +1,24 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit bash-completion-r1 llvm.org
+
+DESCRIPTION="Common files shared between multiple slots of clang"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE=""
+
+PDEPEND="sys-devel/clang:*"
+
+LLVM_COMPONENTS=( clang/utils/bash-autocomplete.sh )
+llvm.org_set_globals
+S=${WORKDIR}/clang/utils
+
+src_install() {
+	newbashcomp bash-autocomplete.sh clang
+}
diff --git a/sys-devel/clang-runtime/clang-runtime-13.0.0.9999.ebuild b/sys-devel/clang-runtime/clang-runtime-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..218cdb1426f6
--- /dev/null
+++ b/sys-devel/clang-runtime/clang-runtime-13.0.0.9999.ebuild
@@ -0,0 +1,25 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit multilib-build
+
+DESCRIPTION="Meta-ebuild for clang runtime libraries"
+HOMEPAGE="https://clang.llvm.org/"
+SRC_URI=""
+
+LICENSE="metapackage"
+SLOT="$(ver_cut 1-3)"
+KEYWORDS=""
+IUSE="+compiler-rt libcxx openmp +sanitize"
+REQUIRED_USE="sanitize? ( compiler-rt )"
+PROPERTIES="live"
+
+RDEPEND="
+	compiler-rt? (
+		~sys-libs/compiler-rt-${PV}:${SLOT}
+		sanitize? ( ~sys-libs/compiler-rt-sanitizers-${PV}:${SLOT} )
+	)
+	libcxx? ( >=sys-libs/libcxx-${PV}[${MULTILIB_USEDEP}] )
+	openmp? ( >=sys-libs/libomp-${PV}[${MULTILIB_USEDEP}] )"
diff --git a/sys-devel/clang/clang-13.0.0.9999.ebuild b/sys-devel/clang/clang-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..8825b6aafaab
--- /dev/null
+++ b/sys-devel/clang/clang-13.0.0.9999.ebuild
@@ -0,0 +1,435 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake llvm llvm.org multilib-minimal pax-utils \
+	prefix python-single-r1 toolchain-funcs
+
+DESCRIPTION="C language family frontend for LLVM"
+HOMEPAGE="https://llvm.org/"
+
+# Keep in sync with sys-devel/llvm
+ALL_LLVM_EXPERIMENTAL_TARGETS=( ARC CSKY VE )
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM AVR BPF Hexagon Lanai Mips MSP430
+	NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore
+	"${ALL_LLVM_EXPERIMENTAL_TARGETS[@]}" )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+
+# MSVCSetupApi.h: MIT
+# sorttable.js: MIT
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA MIT"
+SLOT="$(ver_cut 1)"
+KEYWORDS=""
+IUSE="debug default-compiler-rt default-libcxx default-lld
+	doc +static-analyzer test xml kernel_FreeBSD ${ALL_LLVM_TARGETS[*]}"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}
+	|| ( ${ALL_LLVM_TARGETS[*]} )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	~sys-devel/llvm-${PV}:${SLOT}=[debug=,${MULTILIB_USEDEP}]
+	static-analyzer? ( dev-lang/perl:* )
+	xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+	${PYTHON_DEPS}"
+for x in "${ALL_LLVM_TARGETS[@]}"; do
+	RDEPEND+="
+		${x}? ( ~sys-devel/llvm-${PV}:${SLOT}[${x}] )"
+done
+unset x
+
+DEPEND="${RDEPEND}"
+BDEPEND="
+	>=dev-util/cmake-3.16
+	doc? ( dev-python/sphinx )
+	xml? ( virtual/pkgconfig )
+	${PYTHON_DEPS}"
+RDEPEND="${RDEPEND}
+	!<sys-devel/llvm-4.0.0_rc:0
+	!sys-devel/clang:0"
+PDEPEND="
+	sys-devel/clang-common
+	~sys-devel/clang-runtime-${PV}
+	default-compiler-rt? ( =sys-libs/compiler-rt-${PV%_*}* )
+	default-libcxx? ( >=sys-libs/libcxx-${PV} )
+	default-lld? ( sys-devel/lld )"
+
+LLVM_COMPONENTS=( clang clang-tools-extra )
+LLVM_MANPAGES=build
+LLVM_TEST_COMPONENTS=(
+	llvm/lib/Testing/Support
+	llvm/utils/{lit,llvm-lit,unittest}
+	llvm/utils/{UpdateTestChecks,update_cc_test_checks.py}
+)
+llvm.org_set_globals
+
+# Multilib notes:
+# 1. ABI_* flags control ABIs libclang* is built for only.
+# 2. clang is always capable of compiling code for all ABIs for enabled
+#    target. However, you will need appropriate crt* files (installed
+#    e.g. by sys-devel/gcc and sys-libs/glibc).
+# 3. ${CHOST}-clang wrappers are always installed for all ABIs included
+#    in the current profile (i.e. alike supported by sys-devel/gcc).
+#
+# Therefore: use sys-devel/clang[${MULTILIB_USEDEP}] only if you need
+# multilib clang* libraries (not runtime, not wrappers).
+
+PATCHES=(
+	"${FILESDIR}"/9999/prefix-dirs.patch
+)
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${SLOT} llvm_pkg_setup
+	python-single-r1_pkg_setup
+}
+
+src_prepare() {
+	# create extra parent dir for relative CLANG_RESOURCE_DIR access
+	mkdir -p x/y || die
+	BUILD_DIR=${WORKDIR}/x/y/clang
+
+	llvm.org_src_prepare
+
+	# add Gentoo Portage Prefix for Darwin (see prefix-dirs.patch)
+	eprefixify \
+		lib/Frontend/InitHeaderSearch.cpp \
+		lib/Driver/ToolChains/Darwin.cpp || die
+}
+
+check_distribution_components() {
+	if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]]; then
+		local all_targets=() my_targets=() l
+		cd "${BUILD_DIR}" || die
+
+		while read -r l; do
+			if [[ ${l} == install-*-stripped:* ]]; then
+				l=${l#install-}
+				l=${l%%-stripped*}
+
+				case ${l} in
+					# meta-targets
+					clang-libraries|distribution)
+						continue
+						;;
+					# headers for clang-tidy static library
+					clang-tidy-headers)
+						continue
+						;;
+					# tools
+					clang|clangd|clang-*)
+						;;
+					# static libraries
+					clang*|findAllSymbols)
+						continue
+						;;
+					# conditional to USE=doc
+					docs-clang-html|docs-clang-tools-html)
+						use doc || continue
+						;;
+				esac
+
+				all_targets+=( "${l}" )
+			fi
+		done < <(ninja -t targets all)
+
+		while read -r l; do
+			my_targets+=( "${l}" )
+		done < <(get_distribution_components $"\n")
+
+		local add=() remove=()
+		for l in "${all_targets[@]}"; do
+			if ! has "${l}" "${my_targets[@]}"; then
+				add+=( "${l}" )
+			fi
+		done
+		for l in "${my_targets[@]}"; do
+			if ! has "${l}" "${all_targets[@]}"; then
+				remove+=( "${l}" )
+			fi
+		done
+
+		if [[ ${#add[@]} -gt 0 || ${#remove[@]} -gt 0 ]]; then
+			eqawarn "get_distribution_components() is outdated!"
+			eqawarn "   Add: ${add[*]}"
+			eqawarn "Remove: ${remove[*]}"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+get_distribution_components() {
+	local sep=${1-;}
+
+	local out=(
+		# common stuff
+		clang-cmake-exports
+		clang-headers
+		clang-resource-headers
+		libclang-headers
+
+		# libs
+		clang-cpp
+		libclang
+	)
+
+	if multilib_is_native_abi; then
+		out+=(
+			# common stuff
+			bash-autocomplete
+			libclang-python-bindings
+
+			# tools
+			c-index-test
+			clang
+			clang-format
+			clang-offload-bundler
+			clang-offload-wrapper
+			clang-refactor
+			clang-rename
+			clang-scan-deps
+			diagtool
+			hmaptool
+
+			# extra tools
+			clang-apply-replacements
+			clang-change-namespace
+			clang-doc
+			clang-include-fixer
+			clang-move
+			clang-query
+			clang-reorder-fields
+			clang-tidy
+			clangd
+			find-all-symbols
+			modularize
+			pp-trace
+		)
+
+		if llvm_are_manpages_built; then
+			out+=(
+				# manpages
+				docs-clang-man
+				docs-clang-tools-man
+			)
+		fi
+
+		use doc && out+=(
+			docs-clang-html
+			docs-clang-tools-html
+		)
+
+		use static-analyzer && out+=(
+			clang-check
+			clang-extdef-mapping
+			scan-build
+			scan-view
+		)
+	fi
+
+	printf "%s${sep}" "${out[@]}"
+}
+
+multilib_src_configure() {
+	local llvm_version=$(llvm-config --version) || die
+	local clang_version=$(ver_cut 1-3 "${llvm_version}")
+
+	local mycmakeargs=(
+		-DLLVM_CMAKE_PATH="${EPREFIX}/usr/lib/llvm/${SLOT}/$(get_libdir)/cmake/llvm"
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${SLOT}"
+		-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+		# relative to bindir
+		-DCLANG_RESOURCE_DIR="../../../../lib/clang/${clang_version}"
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DCLANG_LINK_CLANG_DYLIB=ON
+		-DLLVM_DISTRIBUTION_COMPONENTS=$(get_distribution_components)
+
+		-DLLVM_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+		-DLLVM_BUILD_TESTS=$(usex test)
+
+		# these are not propagated reliably, so redefine them
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+
+		-DCMAKE_DISABLE_FIND_PACKAGE_LibXml2=$(usex !xml)
+		# libgomp support fails to find headers without explicit -I
+		# furthermore, it provides only syntax checking
+		-DCLANG_DEFAULT_OPENMP_RUNTIME=libomp
+
+		# override default stdlib and rtlib
+		-DCLANG_DEFAULT_CXX_STDLIB=$(usex default-libcxx libc++ "")
+		-DCLANG_DEFAULT_RTLIB=$(usex default-compiler-rt compiler-rt "")
+		-DCLANG_DEFAULT_LINKER=$(usex default-lld lld "")
+
+		-DCLANG_ENABLE_ARCMT=$(usex static-analyzer)
+		-DCLANG_ENABLE_STATIC_ANALYZER=$(usex static-analyzer)
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+	use test && mycmakeargs+=(
+		-DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	if multilib_is_native_abi; then
+		local build_docs=OFF
+		if llvm_are_manpages_built; then
+			build_docs=ON
+			mycmakeargs+=(
+				-DLLVM_BUILD_DOCS=ON
+				-DLLVM_ENABLE_SPHINX=ON
+				-DCLANG_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+				-DCLANG-TOOLS_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/tools-extra"
+				-DSPHINX_WARNINGS_AS_ERRORS=OFF
+			)
+		fi
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR="${WORKDIR}"/clang-tools-extra
+			-DCLANG_INCLUDE_DOCS=${build_docs}
+			-DCLANG_TOOLS_EXTRA_INCLUDE_DOCS=${build_docs}
+		)
+	else
+		mycmakeargs+=(
+			-DLLVM_TOOL_CLANG_TOOLS_EXTRA_BUILD=OFF
+		)
+	fi
+
+	if [[ -n ${EPREFIX} ]]; then
+		mycmakeargs+=(
+			-DGCC_INSTALL_PREFIX="${EPREFIX}/usr"
+		)
+	fi
+
+	if tc-is-cross-compiler; then
+		[[ -x "/usr/bin/clang-tblgen" ]] \
+			|| die "/usr/bin/clang-tblgen not found or usable"
+		mycmakeargs+=(
+			-DCMAKE_CROSSCOMPILING=ON
+			-DCLANG_TABLEGEN=/usr/bin/clang-tblgen
+		)
+	fi
+
+	# LLVM can have very high memory consumption while linking,
+	# exhausting the limit on 32-bit linker executable
+	use x86 && local -x LDFLAGS="${LDFLAGS} -Wl,--no-keep-memory"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+	cmake_build distribution
+
+	# provide a symlink for tests
+	if [[ ! -L ${WORKDIR}/lib/clang ]]; then
+		mkdir -p "${WORKDIR}"/lib || die
+		ln -s "${BUILD_DIR}/$(get_libdir)/clang" "${WORKDIR}"/lib/clang || die
+	fi
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-clang
+	multilib_is_native_abi &&
+		cmake_build check-clang-tools check-clangd
+}
+
+src_install() {
+	MULTILIB_WRAPPED_HEADERS=(
+		/usr/include/clang/Config/config.h
+	)
+
+	multilib-minimal_src_install
+
+	# Move runtime headers to /usr/lib/clang, where they belong
+	mv "${ED}"/usr/include/clangrt "${ED}"/usr/lib/clang || die
+	# move (remaining) wrapped headers back
+	mv "${ED}"/usr/include "${ED}"/usr/lib/llvm/${SLOT}/include || die
+
+	# Apply CHOST and version suffix to clang tools
+	# note: we use two version components here (vs 3 in runtime path)
+	local llvm_version=$(llvm-config --version) || die
+	local clang_version=$(ver_cut 1 "${llvm_version}")
+	local clang_full_version=$(ver_cut 1-3 "${llvm_version}")
+	local clang_tools=( clang clang++ clang-cl clang-cpp )
+	local abi i
+
+	# cmake gives us:
+	# - clang-X
+	# - clang -> clang-X
+	# - clang++, clang-cl, clang-cpp -> clang
+	# we want to have:
+	# - clang-X
+	# - clang++-X, clang-cl-X, clang-cpp-X -> clang-X
+	# - clang, clang++, clang-cl, clang-cpp -> clang*-X
+	# also in CHOST variant
+	for i in "${clang_tools[@]:1}"; do
+		rm "${ED}/usr/lib/llvm/${SLOT}/bin/${i}" || die
+		dosym "clang-${clang_version}" "/usr/lib/llvm/${SLOT}/bin/${i}-${clang_version}"
+		dosym "${i}-${clang_version}" "/usr/lib/llvm/${SLOT}/bin/${i}"
+	done
+
+	# now create target symlinks for all supported ABIs
+	for abi in $(get_all_abis); do
+		local abi_chost=$(get_abi_CHOST "${abi}")
+		for i in "${clang_tools[@]}"; do
+			dosym "${i}-${clang_version}" \
+				"/usr/lib/llvm/${SLOT}/bin/${abi_chost}-${i}-${clang_version}"
+			dosym "${abi_chost}-${i}-${clang_version}" \
+				"/usr/lib/llvm/${SLOT}/bin/${abi_chost}-${i}"
+		done
+	done
+
+	# Remove unnecessary headers on FreeBSD, bug #417171
+	if use kernel_FreeBSD; then
+		rm "${ED}"/usr/lib/clang/${clang_full_version}/include/{std,float,iso,limits,tgmath,varargs}*.h || die
+	fi
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-distribution
+
+	# move headers to /usr/include for wrapping & ABI mismatch checks
+	# (also drop the version suffix from runtime headers)
+	rm -rf "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${SLOT}/include "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${SLOT}/$(get_libdir)/clang "${ED}"/usr/include/clangrt || die
+}
+
+multilib_src_install_all() {
+	python_fix_shebang "${ED}"
+	if use static-analyzer; then
+		python_optimize "${ED}"/usr/lib/llvm/${SLOT}/share/scan-view
+	fi
+
+	docompress "/usr/lib/llvm/${SLOT}/share/man"
+	llvm_install_manpages
+	# match 'html' non-compression
+	use doc && docompress -x "/usr/share/doc/${PF}/tools-extra"
+	# +x for some reason; TODO: investigate
+	use static-analyzer && fperms a-x "/usr/lib/llvm/${SLOT}/share/man/man1/scan-build.1"
+}
+
+pkg_postinst() {
+	if [[ -z ${ROOT} && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+		eselect compiler-shadow update all
+	fi
+
+	elog "You can find additional utility scripts in:"
+	elog "  ${EROOT}/usr/lib/llvm/${SLOT}/share/clang"
+	elog "Some of them are vim integration scripts (with instructions inside)."
+	elog "The run-clang-tidy.py script requires the following additional package:"
+	elog "  dev-python/pyyaml"
+}
+
+pkg_postrm() {
+	if [[ -z ${ROOT} && -f ${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+		eselect compiler-shadow clean all
+	fi
+}
diff --git a/sys-devel/lld/lld-13.0.0.9999.ebuild b/sys-devel/lld/lld-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..55857fedba99
--- /dev/null
+++ b/sys-devel/lld/lld-13.0.0.9999.ebuild
@@ -0,0 +1,76 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake llvm llvm.org python-any-r1
+
+DESCRIPTION="The LLVM linker (link editor)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="~sys-devel/llvm-${PV}"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	test? (
+		>=dev-util/cmake-3.16
+		$(python_gen_any_dep "~dev-python/lit-${PV}[\${PYTHON_USEDEP}]")
+	)"
+
+LLVM_COMPONENTS=( lld libunwind/include/mach-o )
+LLVM_TEST_COMPONENTS=( llvm/utils/{lit,unittest} )
+llvm.org_set_globals
+
+python_check_deps() {
+	has_version -b "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	LLVM_MAX_SLOT=${PV%%.*} llvm_pkg_setup
+	use test && python-any-r1_pkg_setup
+}
+
+src_unpack() {
+	llvm.org_src_unpack
+
+	# Directory ${WORKDIR}/llvm does not exist with USE="-test",
+	# but LLVM_MAIN_SRC_DIR="${WORKDIR}/llvm" is set below,
+	# and ${LLVM_MAIN_SRC_DIR}/../libunwind/include is used by build system
+	# (lld/MachO/CMakeLists.txt) and is expected to be resolvable
+	# to existent directory ${WORKDIR}/libunwind/include.
+	mkdir -p "${WORKDIR}/llvm" || die
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DBUILD_SHARED_LIBS=OFF
+
+		-DLLVM_INCLUDE_TESTS=$(usex test)
+		-DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+	)
+	use test && mycmakeargs+=(
+		-DLLVM_BUILD_TESTS=ON
+		-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	cmake_src_configure
+}
+
+src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-lld
+}
+
+src_install() {
+	cmake_src_install
+	# LLD has no shared libraries, so strip it all for the time being
+	rm -r "${ED}"/usr/{include,lib*} || die
+}
diff --git a/sys-devel/llvm-common/llvm-common-13.0.0.9999.ebuild b/sys-devel/llvm-common/llvm-common-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..53511a0a20e3
--- /dev/null
+++ b/sys-devel/llvm-common/llvm-common-13.0.0.9999.ebuild
@@ -0,0 +1,27 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit llvm.org
+
+DESCRIPTION="Common files shared between multiple slots of LLVM"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE=""
+
+RDEPEND="!sys-devel/llvm:0"
+
+LLVM_COMPONENTS=( llvm/utils/vim )
+llvm.org_set_globals
+
+src_install() {
+	insinto /usr/share/vim/vimfiles
+	doins -r */
+	# some users may find it useful
+	newdoc README README.vim
+	dodoc vimrc
+}
diff --git a/sys-devel/llvm/llvm-13.0.0.9999.ebuild b/sys-devel/llvm/llvm-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..d51ccdbab14b
--- /dev/null
+++ b/sys-devel/llvm/llvm-13.0.0.9999.ebuild
@@ -0,0 +1,520 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake llvm.org multilib-minimal pax-utils python-any-r1 \
+	toolchain-funcs
+
+DESCRIPTION="Low Level Virtual Machine"
+HOMEPAGE="https://llvm.org/"
+
+# Those are in lib/Targets, without explicit CMakeLists.txt mention
+ALL_LLVM_EXPERIMENTAL_TARGETS=( ARC CSKY VE )
+# Keep in sync with CMakeLists.txt
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM AVR BPF Hexagon Lanai Mips MSP430
+	NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore
+	"${ALL_LLVM_EXPERIMENTAL_TARGETS[@]}" )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+
+# Additional licenses:
+# 1. OpenBSD regex: Henry Spencer's license ('rc' in Gentoo) + BSD.
+# 2. xxhash: BSD.
+# 3. MD5 code: public-domain.
+# 4. ConvertUTF.h: TODO.
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA BSD public-domain rc"
+SLOT="$(ver_cut 1)"
+KEYWORDS=""
+IUSE="debug doc exegesis gold libedit +libffi ncurses test xar xml z3
+	kernel_Darwin ${ALL_LLVM_TARGETS[*]}"
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	sys-libs/zlib:0=[${MULTILIB_USEDEP}]
+	exegesis? ( dev-libs/libpfm:= )
+	gold? ( >=sys-devel/binutils-2.31.1-r4:*[plugins] )
+	libedit? ( dev-libs/libedit:0=[${MULTILIB_USEDEP}] )
+	libffi? ( >=dev-libs/libffi-3.0.13-r1:0=[${MULTILIB_USEDEP}] )
+	ncurses? ( >=sys-libs/ncurses-5.9-r3:0=[${MULTILIB_USEDEP}] )
+	xar? ( app-arch/xar )
+	xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )
+	z3? ( >=sci-mathematics/z3-4.7.1:0=[${MULTILIB_USEDEP}] )"
+DEPEND="${RDEPEND}
+	gold? ( sys-libs/binutils-libs )"
+BDEPEND="
+	dev-lang/perl
+	>=dev-util/cmake-3.16
+	sys-devel/gnuconfig
+	kernel_Darwin? (
+		<sys-libs/libcxx-$(ver_cut 1-3).9999
+		>=sys-devel/binutils-apple-5.1
+	)
+	doc? ( $(python_gen_any_dep '
+		dev-python/recommonmark[${PYTHON_USEDEP}]
+		dev-python/sphinx[${PYTHON_USEDEP}]
+	') )
+	libffi? ( virtual/pkgconfig )
+	${PYTHON_DEPS}"
+# There are no file collisions between these versions but having :0
+# installed means llvm-config there will take precedence.
+RDEPEND="${RDEPEND}
+	!sys-devel/llvm:0"
+PDEPEND="sys-devel/llvm-common
+	gold? ( >=sys-devel/llvmgold-${SLOT} )"
+
+LLVM_COMPONENTS=( llvm )
+LLVM_MANPAGES=build
+llvm.org_set_globals
+
+python_check_deps() {
+	use doc || return 0
+
+	has_version -b "dev-python/recommonmark[${PYTHON_USEDEP}]" &&
+	has_version -b "dev-python/sphinx[${PYTHON_USEDEP}]"
+}
+
+check_live_ebuild() {
+	local prod_targets=(
+		$(sed -n -e '/set(LLVM_ALL_TARGETS/,/)/p' CMakeLists.txt \
+			| tail -n +2 | head -n -1)
+	)
+	local all_targets=(
+		lib/Target/*/
+	)
+	all_targets=( "${all_targets[@]#lib/Target/}" )
+	all_targets=( "${all_targets[@]%/}" )
+
+	local exp_targets=() i
+	for i in "${all_targets[@]}"; do
+		has "${i}" "${prod_targets[@]}" || exp_targets+=( "${i}" )
+	done
+	# reorder
+	all_targets=( "${prod_targets[@]}" "${exp_targets[@]}" )
+
+	if [[ ${exp_targets[*]} != ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]} ]]; then
+		eqawarn "ALL_LLVM_EXPERIMENTAL_TARGETS is outdated!"
+		eqawarn "    Have: ${ALL_LLVM_EXPERIMENTAL_TARGETS[*]}"
+		eqawarn "Expected: ${exp_targets[*]}"
+		eqawarn
+	fi
+
+	if [[ ${all_targets[*]} != ${ALL_LLVM_TARGETS[*]#llvm_targets_} ]]; then
+		eqawarn "ALL_LLVM_TARGETS is outdated!"
+		eqawarn "    Have: ${ALL_LLVM_TARGETS[*]#llvm_targets_}"
+		eqawarn "Expected: ${all_targets[*]}"
+	fi
+}
+
+check_distribution_components() {
+	if [[ ${CMAKE_MAKEFILE_GENERATOR} == ninja ]]; then
+		local all_targets=() my_targets=() l
+		cd "${BUILD_DIR}" || die
+
+		while read -r l; do
+			if [[ ${l} == install-*-stripped:* ]]; then
+				l=${l#install-}
+				l=${l%%-stripped*}
+
+				case ${l} in
+					# shared libs
+					LLVM|LLVMgold)
+						;;
+					# TableGen lib + deps
+					LLVMDemangle|LLVMSupport|LLVMTableGen)
+						;;
+					# static libs
+					LLVM*)
+						continue
+						;;
+					# meta-targets
+					distribution|llvm-libraries)
+						continue
+						;;
+					# used only w/ USE=doc
+					docs-llvm-html)
+						use doc || continue
+						;;
+				esac
+
+				all_targets+=( "${l}" )
+			fi
+		done < <(ninja -t targets all)
+
+		while read -r l; do
+			my_targets+=( "${l}" )
+		done < <(get_distribution_components $"\n")
+
+		local add=() remove=()
+		for l in "${all_targets[@]}"; do
+			if ! has "${l}" "${my_targets[@]}"; then
+				add+=( "${l}" )
+			fi
+		done
+		for l in "${my_targets[@]}"; do
+			if ! has "${l}" "${all_targets[@]}"; then
+				remove+=( "${l}" )
+			fi
+		done
+
+		if [[ ${#add[@]} -gt 0 || ${#remove[@]} -gt 0 ]]; then
+			eqawarn "get_distribution_components() is outdated!"
+			eqawarn "   Add: ${add[*]}"
+			eqawarn "Remove: ${remove[*]}"
+		fi
+		cd - >/dev/null || die
+	fi
+}
+
+src_prepare() {
+	# Fix llvm-config for shared linking and sane flags
+	# https://bugs.gentoo.org/show_bug.cgi?id=565358
+	eapply "${FILESDIR}"/9999/0007-llvm-config-Clean-up-exported-values-update-for-shar.patch
+
+	# disable use of SDK on OSX, bug #568758
+	sed -i -e 's/xcrun/false/' utils/lit/lit/util.py || die
+
+	# Update config.guess to support more systems
+	cp "${BROOT}/usr/share/gnuconfig/config.guess" cmake/ || die
+
+	# Verify that the live ebuild is up-to-date
+	check_live_ebuild
+
+	llvm.org_src_prepare
+}
+
+# Is LLVM being linked against libc++?
+is_libcxx_linked() {
+	local code='#include <ciso646>
+#if defined(_LIBCPP_VERSION)
+	HAVE_LIBCXX
+#endif
+'
+	local out=$($(tc-getCXX) ${CXXFLAGS} ${CPPFLAGS} -x c++ -E -P - <<<"${code}") || return 1
+
+	[[ ${out} == *HAVE_LIBCXX* ]]
+}
+
+get_distribution_components() {
+	local sep=${1-;}
+
+	local out=(
+		# shared libs
+		LLVM
+		LTO
+		Remarks
+
+		# tools
+		llvm-config
+
+		# common stuff
+		cmake-exports
+		llvm-headers
+
+		# libraries needed for clang-tblgen
+		LLVMDemangle
+		LLVMSupport
+		LLVMTableGen
+	)
+
+	if multilib_is_native_abi; then
+		out+=(
+			# utilities
+			llvm-tblgen
+			FileCheck
+			llvm-PerfectShuffle
+			count
+			not
+			yaml-bench
+
+			# tools
+			bugpoint
+			dsymutil
+			llc
+			lli
+			lli-child-target
+			llvm-addr2line
+			llvm-ar
+			llvm-as
+			llvm-bcanalyzer
+			llvm-bitcode-strip
+			llvm-c-test
+			llvm-cat
+			llvm-cfi-verify
+			llvm-config
+			llvm-cov
+			llvm-cvtres
+			llvm-cxxdump
+			llvm-cxxfilt
+			llvm-cxxmap
+			llvm-diff
+			llvm-dis
+			llvm-dlltool
+			llvm-dwarfdump
+			llvm-dwp
+			llvm-elfabi
+			llvm-exegesis
+			llvm-extract
+			llvm-gsymutil
+			llvm-ifs
+			llvm-install-name-tool
+			llvm-jitlink
+			llvm-jitlink-executor
+			llvm-lib
+			llvm-libtool-darwin
+			llvm-link
+			llvm-lipo
+			llvm-lto
+			llvm-lto2
+			llvm-mc
+			llvm-mca
+			llvm-ml
+			llvm-modextract
+			llvm-mt
+			llvm-nm
+			llvm-objcopy
+			llvm-objdump
+			llvm-opt-report
+			llvm-pdbutil
+			llvm-profdata
+			llvm-ranlib
+			llvm-rc
+			llvm-readelf
+			llvm-readobj
+			llvm-reduce
+			llvm-rtdyld
+			llvm-size
+			llvm-split
+			llvm-stress
+			llvm-strings
+			llvm-strip
+			llvm-symbolizer
+			llvm-undname
+			llvm-xray
+			obj2yaml
+			opt
+			sancov
+			sanstats
+			split-file
+			verify-uselistorder
+			yaml2obj
+
+			# python modules
+			opt-viewer
+		)
+
+		if llvm_are_manpages_built; then
+			out+=(
+				# manpages
+				docs-dsymutil-man
+				docs-llvm-dwarfdump-man
+				docs-llvm-man
+			)
+		fi
+		use doc && out+=(
+			docs-llvm-html
+		)
+
+		use gold && out+=(
+			LLVMgold
+		)
+	fi
+
+	printf "%s${sep}" "${out[@]}"
+}
+
+multilib_src_configure() {
+	local ffi_cflags ffi_ldflags
+	if use libffi; then
+		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+		ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		# disable appending VCS revision to the version to improve
+		# direct cache hit ratio
+		-DLLVM_APPEND_VC_REV=OFF
+		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${SLOT}"
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
+		-DBUILD_SHARED_LIBS=OFF
+		-DLLVM_BUILD_LLVM_DYLIB=ON
+		-DLLVM_LINK_LLVM_DYLIB=ON
+		-DLLVM_DISTRIBUTION_COMPONENTS=$(get_distribution_components)
+
+		# cheap hack: LLVM combines both anyway, and the only difference
+		# is that the former list is explicitly verified at cmake time
+		-DLLVM_TARGETS_TO_BUILD=""
+		-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+		-DLLVM_BUILD_TESTS=$(usex test)
+
+		-DLLVM_ENABLE_FFI=$(usex libffi)
+		-DLLVM_ENABLE_LIBEDIT=$(usex libedit)
+		-DLLVM_ENABLE_TERMINFO=$(usex ncurses)
+		-DLLVM_ENABLE_LIBXML2=$(usex xml)
+		-DLLVM_ENABLE_ASSERTIONS=$(usex debug)
+		-DLLVM_ENABLE_LIBPFM=$(usex exegesis)
+		-DLLVM_ENABLE_EH=ON
+		-DLLVM_ENABLE_RTTI=ON
+		-DLLVM_ENABLE_Z3_SOLVER=$(usex z3)
+
+		-DLLVM_HOST_TRIPLE="${CHOST}"
+
+		-DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
+		-DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
+		# used only for llvm-objdump tool
+		-DHAVE_LIBXAR=$(multilib_native_usex xar 1 0)
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+
+		# disable OCaml bindings (now in dev-ml/llvm-ocaml)
+		-DOCAMLFIND=NO
+	)
+
+	if is_libcxx_linked; then
+		# Smart hack: alter version suffix -> SOVERSION when linking
+		# against libc++. This way we won't end up mixing LLVM libc++
+		# libraries with libstdc++ clang, and the other way around.
+		mycmakeargs+=(
+			-DLLVM_VERSION_SUFFIX="libcxx"
+			-DLLVM_ENABLE_LIBCXX=ON
+		)
+	fi
+
+#	Note: go bindings have no CMake rules at the moment
+#	but let's kill the check in case they are introduced
+#	if ! multilib_is_native_abi || ! use go; then
+		mycmakeargs+=(
+			-DGO_EXECUTABLE=GO_EXECUTABLE-NOTFOUND
+		)
+#	fi
+
+	use test && mycmakeargs+=(
+		-DLLVM_LIT_ARGS="$(get_lit_flags)"
+	)
+
+	if multilib_is_native_abi; then
+		local build_docs=OFF
+		if llvm_are_manpages_built; then
+			build_docs=ON
+			mycmakeargs+=(
+				-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+				-DLLVM_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+				-DSPHINX_WARNINGS_AS_ERRORS=OFF
+			)
+		fi
+
+		mycmakeargs+=(
+			-DLLVM_BUILD_DOCS=${build_docs}
+			-DLLVM_ENABLE_OCAMLDOC=OFF
+			-DLLVM_ENABLE_SPHINX=${build_docs}
+			-DLLVM_ENABLE_DOXYGEN=OFF
+			-DLLVM_INSTALL_UTILS=ON
+		)
+		use gold && mycmakeargs+=(
+			-DLLVM_BINUTILS_INCDIR="${EPREFIX}"/usr/include
+		)
+	fi
+
+	if tc-is-cross-compiler; then
+		local tblgen="${EPREFIX}/usr/lib/llvm/${SLOT}/bin/llvm-tblgen"
+		[[ -x "${tblgen}" ]] \
+			|| die "${tblgen} not found or usable"
+		mycmakeargs+=(
+			-DCMAKE_CROSSCOMPILING=ON
+			-DLLVM_TABLEGEN="${tblgen}"
+		)
+	fi
+
+	# workaround BMI bug in gcc-7 (fixed in 7.4)
+	# https://bugs.gentoo.org/649880
+	# apply only to x86, https://bugs.gentoo.org/650506
+	if tc-is-gcc && [[ ${MULTILIB_ABI_FLAG} == abi_x86* ]] &&
+			[[ $(gcc-major-version) -eq 7 && $(gcc-minor-version) -lt 4 ]]
+	then
+		local CFLAGS="${CFLAGS} -mno-bmi"
+		local CXXFLAGS="${CXXFLAGS} -mno-bmi"
+	fi
+
+	# LLVM can have very high memory consumption while linking,
+	# exhausting the limit on 32-bit linker executable
+	use x86 && local -x LDFLAGS="${LDFLAGS} -Wl,--no-keep-memory"
+
+	# LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+	use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+	cmake_src_configure
+
+	multilib_is_native_abi && check_distribution_components
+}
+
+multilib_src_compile() {
+	cmake_build distribution
+
+	pax-mark m "${BUILD_DIR}"/bin/llvm-rtdyld
+	pax-mark m "${BUILD_DIR}"/bin/lli
+	pax-mark m "${BUILD_DIR}"/bin/lli-child-target
+
+	if use test; then
+		pax-mark m "${BUILD_DIR}"/unittests/ExecutionEngine/Orc/OrcJITTests
+		pax-mark m "${BUILD_DIR}"/unittests/ExecutionEngine/MCJIT/MCJITTests
+		pax-mark m "${BUILD_DIR}"/unittests/Support/SupportTests
+	fi
+}
+
+multilib_src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check
+}
+
+src_install() {
+	local MULTILIB_CHOST_TOOLS=(
+		/usr/lib/llvm/${SLOT}/bin/llvm-config
+	)
+
+	local MULTILIB_WRAPPED_HEADERS=(
+		/usr/include/llvm/Config/llvm-config.h
+	)
+
+	local LLVM_LDPATHS=()
+	multilib-minimal_src_install
+
+	# move wrapped headers back
+	mv "${ED}"/usr/include "${ED}"/usr/lib/llvm/${SLOT}/include || die
+}
+
+multilib_src_install() {
+	DESTDIR=${D} cmake_build install-distribution
+
+	# move headers to /usr/include for wrapping
+	rm -rf "${ED}"/usr/include || die
+	mv "${ED}"/usr/lib/llvm/${SLOT}/include "${ED}"/usr/include || die
+
+	LLVM_LDPATHS+=( "${EPREFIX}/usr/lib/llvm/${SLOT}/$(get_libdir)" )
+}
+
+multilib_src_install_all() {
+	local revord=$(( 9999 - ${SLOT} ))
+	newenvd - "60llvm-${revord}" <<-_EOF_
+		PATH="${EPREFIX}/usr/lib/llvm/${SLOT}/bin"
+		# we need to duplicate it in ROOTPATH for Portage to respect...
+		ROOTPATH="${EPREFIX}/usr/lib/llvm/${SLOT}/bin"
+		MANPATH="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+		LDPATH="$( IFS=:; echo "${LLVM_LDPATHS[*]}" )"
+	_EOF_
+
+	docompress "/usr/lib/llvm/${SLOT}/share/man"
+	llvm_install_manpages
+}
+
+pkg_postinst() {
+	elog "You can find additional opt-viewer utility scripts in:"
+	elog "  ${EROOT}/usr/lib/llvm/${SLOT}/share/opt-viewer"
+	elog "To use these scripts, you will need Python along with the following"
+	elog "packages:"
+	elog "  dev-python/pygments (for opt-viewer)"
+	elog "  dev-python/pyyaml (for all of them)"
+}
diff --git a/sys-devel/llvmgold/llvmgold-13.ebuild b/sys-devel/llvmgold/llvmgold-13.ebuild
new file mode 100644
index 000000000000..3bb1b5358af3
--- /dev/null
+++ b/sys-devel/llvmgold/llvmgold-13.ebuild
@@ -0,0 +1,25 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DESCRIPTION="LLVMgold plugin symlink for autoloading"
+HOMEPAGE="https://llvm.org/"
+SRC_URI=""
+
+LICENSE="public-domain"
+SLOT="0"
+KEYWORDS=""
+IUSE=""
+PROPERTIES="live"
+
+RDEPEND="sys-devel/llvm:${PV}[gold]
+	!sys-devel/llvm:0"
+
+S=${WORKDIR}
+
+src_install() {
+	dodir "/usr/${CHOST}/binutils-bin/lib/bfd-plugins"
+	dosym "../../../../lib/llvm/${PV}/$(get_libdir)/LLVMgold.so" \
+		"/usr/${CHOST}/binutils-bin/lib/bfd-plugins/LLVMgold.so"
+}
diff --git a/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-13.0.0.9999.ebuild b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..4261329f9d3c
--- /dev/null
+++ b/sys-libs/compiler-rt-sanitizers/compiler-rt-sanitizers-13.0.0.9999.ebuild
@@ -0,0 +1,197 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit check-reqs cmake flag-o-matic llvm llvm.org python-any-r1
+
+DESCRIPTION="Compiler runtime libraries for clang (sanitizers & xray)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="$(ver_cut 1-3)"
+KEYWORDS=""
+IUSE="+clang test elibc_glibc"
+# base targets
+IUSE+=" +libfuzzer +profile +xray"
+# sanitizer targets, keep in sync with config-ix.cmake
+# NB: ubsan, scudo deliberately match two entries
+SANITIZER_FLAGS=(
+	asan dfsan lsan msan hwasan tsan ubsan safestack cfi scudo
+	shadowcallstack gwp-asan
+)
+IUSE+=" ${SANITIZER_FLAGS[@]/#/+}"
+REQUIRED_USE="
+	|| ( ${SANITIZER_FLAGS[*]} libfuzzer profile xray )
+	gwp-asan? ( scudo )
+	ubsan? ( cfi )"
+RESTRICT="!test? ( test ) !clang? ( test )"
+
+CLANG_SLOT=${SLOT%%.*}
+# llvm-6 for new lit options
+DEPEND="
+	>=sys-devel/llvm-6"
+BDEPEND="
+	>=dev-util/cmake-3.16
+	clang? ( sys-devel/clang )
+	elibc_glibc? ( net-libs/libtirpc )
+	test? (
+		!<sys-apps/sandbox-2.13
+		$(python_gen_any_dep ">=dev-python/lit-5[\${PYTHON_USEDEP}]")
+		=sys-devel/clang-${PV%_*}*:${CLANG_SLOT}
+		sys-libs/compiler-rt:${SLOT}
+	)
+	${PYTHON_DEPS}"
+
+LLVM_COMPONENTS=( compiler-rt )
+LLVM_TEST_COMPONENTS=( llvm/lib/Testing/Support llvm/utils/unittest )
+llvm.org_set_globals
+
+PATCHES=(
+	"${FILESDIR}/9999/compiler-rt-prefix-paths.patch"
+)
+
+python_check_deps() {
+	use test || return 0
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+check_space() {
+	if use test; then
+		local CHECKREQS_DISK_BUILD=11G
+		check-reqs_pkg_pretend
+	fi
+}
+
+pkg_pretend() {
+	check_space
+}
+
+pkg_setup() {
+	check_space
+	llvm_pkg_setup
+	python-any-r1_pkg_setup
+}
+
+src_prepare() {
+	sed -i -e 's:-Werror::' lib/tsan/go/buildgo.sh || die
+
+	local flag
+	for flag in "${SANITIZER_FLAGS[@]}"; do
+		if ! use "${flag}"; then
+			local cmake_flag=${flag/-/_}
+			sed -i -e "/COMPILER_RT_HAS_${cmake_flag^^}/s:TRUE:FALSE:" \
+				cmake/config-ix.cmake || die
+		fi
+	done
+
+	if use asan && ! use profile; then
+		# TODO: fix these tests to be skipped upstream
+		rm test/asan/TestCases/asan_and_llvm_coverage_test.cpp || die
+	fi
+
+	llvm.org_src_prepare
+}
+
+src_configure() {
+	# pre-set since we need to pass it to cmake
+	BUILD_DIR=${WORKDIR}/compiler-rt_build
+
+	if use clang; then
+		local -x CC=${CHOST}-clang
+		local -x CXX=${CHOST}-clang++
+		strip-unsupported-flags
+	fi
+
+	local flag want_sanitizer=OFF
+	for flag in "${SANITIZER_FLAGS[@]}"; do
+		if use "${flag}"; then
+			want_sanitizer=ON
+			break
+		fi
+	done
+
+	local mycmakeargs=(
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${SLOT}"
+		# use a build dir structure consistent with install
+		# this makes it possible to easily deploy test-friendly clang
+		-DCOMPILER_RT_OUTPUT_DIR="${BUILD_DIR}/lib/clang/${SLOT}"
+
+		-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
+		# builtins & crt installed by sys-libs/compiler-rt
+		-DCOMPILER_RT_BUILD_BUILTINS=OFF
+		-DCOMPILER_RT_BUILD_CRT=OFF
+		-DCOMPILER_RT_BUILD_LIBFUZZER=$(usex libfuzzer)
+		-DCOMPILER_RT_BUILD_PROFILE=$(usex profile)
+		-DCOMPILER_RT_BUILD_SANITIZERS="${want_sanitizer}"
+		-DCOMPILER_RT_BUILD_XRAY=$(usex xray)
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_MAIN_SRC_DIR="${WORKDIR}/llvm"
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+
+			# they are created during src_test()
+			-DCOMPILER_RT_TEST_COMPILER="${BUILD_DIR}/lib/llvm/${CLANG_SLOT}/bin/clang"
+			-DCOMPILER_RT_TEST_CXX_COMPILER="${BUILD_DIR}/lib/llvm/${CLANG_SLOT}/bin/clang++"
+		)
+
+		# same flags are passed for build & tests, so we need to strip
+		# them down to a subset supported by clang
+		CC=${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang \
+		CXX=${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang++ \
+		strip-unsupported-flags
+	fi
+
+	if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
+		mycmakeargs+=(
+			# setting -isysroot is disabled with compiler-rt-prefix-paths.patch
+			# this allows adding arm64 support using SDK in EPREFIX
+			-DDARWIN_macosx_CACHED_SYSROOT="${EPREFIX}/MacOSX.sdk"
+			# Set version based on the SDK in EPREFIX
+			# This disables i386 for SDK >= 10.15
+			# Will error if has_use tsan and SDK < 10.12
+			-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(realpath ${EPREFIX}/MacOSX.sdk | sed -e 's/.*MacOSX\(.*\)\.sdk/\1/')"
+			# Use our libtool instead of looking it up with xcrun
+			-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
+		)
+	fi
+
+	cmake_src_configure
+
+	if use test; then
+		local sys_dir=( "${EPREFIX}"/usr/lib/clang/${SLOT}/lib/* )
+		[[ -e ${sys_dir} ]] || die "Unable to find ${sys_dir}"
+		[[ ${#sys_dir[@]} -eq 1 ]] || die "Non-deterministic compiler-rt install: ${sys_dir[*]}"
+
+		# copy clang over since resource_dir is located relatively to binary
+		# therefore, we can put our new libraries in it
+		mkdir -p "${BUILD_DIR}"/lib/{llvm/${CLANG_SLOT}/{bin,$(get_libdir)},clang/${SLOT}/include} || die
+		cp "${EPREFIX}"/usr/lib/llvm/${CLANG_SLOT}/bin/clang{,++} \
+			"${BUILD_DIR}"/lib/llvm/${CLANG_SLOT}/bin/ || die
+		cp "${EPREFIX}"/usr/lib/clang/${SLOT}/include/*.h \
+			"${BUILD_DIR}"/lib/clang/${SLOT}/include/ || die
+		cp "${sys_dir}"/*builtins*.a \
+			"${BUILD_DIR}/lib/clang/${SLOT}/lib/${sys_dir##*/}/" || die
+		# we also need LLVMgold.so for gold-based tests
+		if [[ -f ${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/$(get_libdir)/LLVMgold.so ]]; then
+			ln -s "${EPREFIX}"/usr/lib/llvm/${CLANG_SLOT}/$(get_libdir)/LLVMgold.so \
+				"${BUILD_DIR}"/lib/llvm/${CLANG_SLOT}/$(get_libdir)/ || die
+		fi
+	fi
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+	# disable sandbox to have it stop clobbering LD_PRELOAD
+	local -x SANDBOX_ON=0
+	# wipe LD_PRELOAD to make ASAN happy
+	local -x LD_PRELOAD=
+
+	cmake_build check-all
+}
diff --git a/sys-libs/compiler-rt/compiler-rt-13.0.0.9999.ebuild b/sys-libs/compiler-rt/compiler-rt-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..07412646ab2a
--- /dev/null
+++ b/sys-libs/compiler-rt/compiler-rt-13.0.0.9999.ebuild
@@ -0,0 +1,126 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake flag-o-matic llvm llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="Compiler runtime library for clang (built-in part)"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="$(ver_cut 1-3)"
+KEYWORDS=""
+IUSE="+clang test"
+RESTRICT="!test? ( test ) !clang? ( test )"
+
+CLANG_SLOT=${SLOT%%.*}
+# llvm-6 for new lit options
+DEPEND="
+	>=sys-devel/llvm-6"
+BDEPEND="
+	>=dev-util/cmake-3.16
+	clang? ( sys-devel/clang )
+	test? (
+		$(python_gen_any_dep ">=dev-python/lit-9.0.1[\${PYTHON_USEDEP}]")
+		=sys-devel/clang-${PV%_*}*:${CLANG_SLOT}
+	)
+	${PYTHON_DEPS}"
+
+LLVM_COMPONENTS=( compiler-rt )
+llvm.org_set_globals
+
+PATCHES=(
+	"${FILESDIR}/9999/${PN}-prefix-paths.patch"
+)
+
+python_check_deps() {
+	use test || return 0
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_pretend() {
+	if ! use clang && ! tc-is-clang; then
+		ewarn "Building using a compiler other than clang may result in broken atomics"
+		ewarn "library. Enable USE=clang unless you have a very good reason not to."
+	fi
+}
+
+pkg_setup() {
+	# Darwin Prefix builds do not have llvm installed yet, so rely on
+	# bootstrap-prefix to set the appropriate path vars to LLVM instead
+	# of using llvm_pkg_setup.
+	if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
+		llvm_pkg_setup
+	fi
+	python-any-r1_pkg_setup
+}
+
+test_compiler() {
+	$(tc-getCC) ${CFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c - \
+		<<<'int main() { return 0; }' &>/dev/null
+}
+
+src_configure() {
+	# pre-set since we need to pass it to cmake
+	BUILD_DIR=${WORKDIR}/${P}_build
+
+	local nolib_flags=( -nodefaultlibs -lc )
+	if use clang; then
+		local -x CC=${CHOST}-clang
+		local -x CXX=${CHOST}-clang++
+		strip-unsupported-flags
+		# ensure we can use clang before installing compiler-rt
+		local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
+	elif ! test_compiler; then
+		if test_compiler "${nolib_flags[@]}"; then
+			local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
+			ewarn "${CC} seems to lack runtime, trying with ${nolib_flags[*]}"
+		fi
+	fi
+
+	local mycmakeargs=(
+		-DCOMPILER_RT_INSTALL_PATH="${EPREFIX}/usr/lib/clang/${SLOT}"
+
+		-DCOMPILER_RT_INCLUDE_TESTS=$(usex test)
+		-DCOMPILER_RT_BUILD_LIBFUZZER=OFF
+		-DCOMPILER_RT_BUILD_PROFILE=OFF
+		-DCOMPILER_RT_BUILD_SANITIZERS=OFF
+		-DCOMPILER_RT_BUILD_XRAY=OFF
+
+		-DPython3_EXECUTABLE="${PYTHON}"
+	)
+
+	if use prefix && [[ "${CHOST}" == *-darwin* ]] ; then
+		mycmakeargs+=(
+			# setting -isysroot is disabled with compiler-rt-prefix-paths.patch
+			# this allows adding arm64 support using SDK in EPREFIX
+			-DDARWIN_macosx_CACHED_SYSROOT="${EPREFIX}/MacOSX.sdk"
+			# Set version based on the SDK in EPREFIX.
+			# This disables i386 for SDK >= 10.15
+			-DDARWIN_macosx_OVERRIDE_SDK_VERSION="$(realpath ${EPREFIX}/MacOSX.sdk | sed -e 's/.*MacOSX\(.*\)\.sdk/\1/')"
+			# Use our libtool instead of looking it up with xcrun
+			-DCMAKE_LIBTOOL="${EPREFIX}/usr/bin/${CHOST}-libtool"
+		)
+	fi
+
+	if use test; then
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags)"
+
+			-DCOMPILER_RT_TEST_COMPILER="${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang"
+			-DCOMPILER_RT_TEST_CXX_COMPILER="${EPREFIX}/usr/lib/llvm/${CLANG_SLOT}/bin/clang++"
+		)
+	fi
+
+	cmake_src_configure
+}
+
+src_test() {
+	# respect TMPDIR!
+	local -x LIT_PRESERVES_TMP=1
+
+	cmake_build check-builtins
+}
diff --git a/sys-libs/libcxx/libcxx-13.0.0.9999.ebuild b/sys-libs/libcxx/libcxx-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..6bfe1aa438b4
--- /dev/null
+++ b/sys-libs/libcxx/libcxx-13.0.0.9999.ebuild
@@ -0,0 +1,218 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+CMAKE_ECLASS=cmake
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake-multilib llvm llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
+HOMEPAGE="https://libcxx.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS=""
+IUSE="elibc_glibc elibc_musl +libcxxabi +libunwind +static-libs test"
+REQUIRED_USE="libunwind? ( libcxxabi )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
+	!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )"
+# llvm-6 for new lit options
+# clang-3.9.0 installs necessary target symlinks unconditionally
+# which removes the need for MULTILIB_USEDEP
+DEPEND="${RDEPEND}
+	>=sys-devel/llvm-6"
+BDEPEND="
+	test? (
+		>=dev-util/cmake-3.16
+		>=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)"
+
+DOCS=( CREDITS.TXT )
+
+LLVM_COMPONENTS=( libcxx{,abi} llvm/{cmake/modules,utils/llvm-lit} )
+llvm.org_set_globals
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	# Darwin Prefix builds do not have llvm installed yet, so rely on
+	# bootstrap-prefix to set the appropriate path vars to LLVM instead
+	# of using llvm_pkg_setup.
+	if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
+		llvm_pkg_setup
+	fi
+	use test && python-any-r1_pkg_setup
+
+	if ! use libcxxabi && ! tc-is-gcc ; then
+		eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
+		eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
+		eerror "and try again."
+		die
+	fi
+}
+
+src_prepare() {
+	# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
+	# out-of-tree build.
+	eapply "${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
+
+	llvm.org_src_prepare
+}
+
+test_compiler() {
+	$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
+		<<<'int main() { return 0; }' &>/dev/null
+}
+
+src_configure() {
+	# note: we need to do this before multilib kicks in since it will
+	# alter the CHOST
+	local cxxabi cxxabi_incs
+	if use libcxxabi; then
+		cxxabi=libcxxabi
+		cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
+	else
+		local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
+		cxxabi=libsupc++
+		cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
+	fi
+
+	multilib-minimal_src_configure
+}
+
+multilib_src_configure() {
+	# we want -lgcc_s for unwinder, and for compiler runtime when using
+	# gcc, clang with gcc runtime (or any unknown compiler)
+	local extra_libs=() want_gcc_s=ON want_compiler_rt=OFF
+	if use libunwind; then
+		# work-around missing -lunwind upstream
+		extra_libs+=( -lunwind )
+		# if we're using libunwind and clang with compiler-rt, we want
+		# to link to compiler-rt instead of -lgcc_s
+		if tc-is-clang; then
+			local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
+			   ${LDFLAGS} -print-libgcc-file-name)
+			if [[ ${compiler_rt} == *libclang_rt* ]]; then
+				want_gcc_s=OFF
+				want_compiler_rt=ON
+				extra_libs+=( "${compiler_rt}" )
+			fi
+		fi
+	elif [[ ${CHOST} == *-darwin* ]] && tc-is-clang; then
+		# clang-based darwin prefix disables libunwind useflag during
+		# bootstrap, because libunwind is not in the prefix yet.
+		# override the default, though, because clang based libcxx
+		# should never use gcc_s on Darwin.
+		want_gcc_s=OFF
+		# compiler_rt is not available in EPREFIX during bootstrap,
+		# so we cannot link to it yet anyway, so keep the defaults
+		# of want_compiler_rt=OFF and extra_libs=()
+	fi
+
+	# bootstrap: cmake is unhappy if compiler can't link to stdlib
+	local nolib_flags=( -nodefaultlibs -lc )
+	if ! test_compiler; then
+		if test_compiler "${nolib_flags[@]}"; then
+			local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
+			ewarn "${CXX} seems to lack runtime, trying with ${nolib_flags[*]}"
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXX_ENABLE_SHARED=ON
+		-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXX_CXX_ABI=${cxxabi}
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
+		# we're using our own mechanism for generating linker scripts
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
+		-DLIBCXX_INCLUDE_TESTS=$(usex test)
+		-DLIBCXX_USE_COMPILER_RT=${want_compiler_rt}
+		-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
+	)
+
+	if use test; then
+		local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+		[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags);--param=cxx_under_test=${clang_path}"
+			-DPython3_EXECUTABLE="${PYTHON}"
+		)
+	fi
+	cmake_src_configure
+}
+
+multilib_src_test() {
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-cxx
+}
+
+# Usage: deps
+gen_ldscript() {
+	local output_format
+	output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
+	[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
+
+	cat <<-END_LDSCRIPT
+/* GNU ld script
+   Include missing dependencies
+*/
+${output_format}
+GROUP ( $@ )
+END_LDSCRIPT
+}
+
+gen_static_ldscript() {
+	local libdir=$(get_libdir)
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "libsupc++.a")
+
+	# Move it first.
+	mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
+	# Generate libc++.a ldscript for inclusion of its dependencies so that
+	# clang++ -stdlib=libc++ -static works out of the box.
+	local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
+	# On Linux/glibc it does not link without libpthread or libdl. It is
+	# fine on FreeBSD.
+	use elibc_glibc && deps+=" libpthread.a libdl.a"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
+}
+
+gen_shared_ldscript() {
+	local libdir=$(get_libdir)
+	# libsupc++ doesn't have a shared version
+	local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "libsupc++.a")
+
+	mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
+	local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
+
+	gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
+}
+
+multilib_src_install() {
+	cmake_src_install
+	if [[ ${CHOST} != *-darwin* ]] ; then
+		gen_shared_ldscript
+		use static-libs && gen_static_ldscript
+	fi
+}
+
+pkg_postinst() {
+	elog "This package (${PN}) is mainly intended as a replacement for the C++"
+	elog "standard library when using clang."
+	elog "To use it, instead of libstdc++, use:"
+	elog "    clang++ -stdlib=libc++"
+	elog "to compile your C++ programs."
+}
diff --git a/sys-libs/libcxxabi/libcxxabi-13.0.0.9999.ebuild b/sys-libs/libcxxabi/libcxxabi-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..640970313365
--- /dev/null
+++ b/sys-libs/libcxxabi/libcxxabi-13.0.0.9999.ebuild
@@ -0,0 +1,121 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+CMAKE_ECLASS=cmake
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake-multilib llvm llvm.org python-any-r1 toolchain-funcs
+
+DESCRIPTION="Low level support for a standard C++ library"
+HOMEPAGE="https://libcxxabi.llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS=""
+IUSE="+libunwind +static-libs test elibc_musl"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	libunwind? (
+		|| (
+			>=sys-libs/libunwind-1.0.1-r1[static-libs?,${MULTILIB_USEDEP}]
+			>=sys-libs/llvm-libunwind-3.9.0-r1[static-libs?,${MULTILIB_USEDEP}]
+		)
+	)"
+# llvm-6 for new lit options
+DEPEND="${RDEPEND}
+	>=sys-devel/llvm-6"
+BDEPEND="
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)"
+
+# libcxx is needed uncondtionally for the headers
+LLVM_COMPONENTS=( libcxx{abi,} llvm/cmake/modules )
+llvm.org_set_globals
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	# darwin prefix builds do not have llvm installed yet, so rely on bootstrap-prefix
+	# to set the appropriate path vars to LLVM instead of using llvm_pkg_setup.
+	if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
+		llvm_pkg_setup
+	fi
+	use test && python-any-r1_pkg_setup
+}
+
+multilib_src_configure() {
+	# link against compiler-rt instead of libgcc if we are using clang with libunwind
+	local want_compiler_rt=OFF
+	if use libunwind && tc-is-clang; then
+		local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
+			${LDFLAGS} -print-libgcc-file-name)
+		if [[ ${compiler_rt} == *libclang_rt* ]]; then
+			want_compiler_rt=ON
+		fi
+	fi
+
+	local libdir=$(get_libdir)
+	local mycmakeargs=(
+		-DLIBCXXABI_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBCXXABI_ENABLE_SHARED=ON
+		-DLIBCXXABI_ENABLE_STATIC=$(usex static-libs)
+		-DLIBCXXABI_USE_LLVM_UNWINDER=$(usex libunwind)
+		-DLIBCXXABI_INCLUDE_TESTS=$(usex test)
+		-DLIBCXXABI_USE_COMPILER_RT=${want_compiler_rt}
+
+		-DLIBCXXABI_LIBCXX_INCLUDES="${WORKDIR}"/libcxx/include
+		# upstream is omitting standard search path for this
+		# probably because gcc & clang are bundling their own unwind.h
+		-DLIBCXXABI_LIBUNWIND_INCLUDES="${EPREFIX}"/usr/include
+	)
+	if use test; then
+		local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+		[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags);--param=cxx_under_test=${clang_path}"
+		)
+	fi
+	cmake_src_configure
+}
+
+build_libcxx() {
+	local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/$(get_libdir)"
+	local CMAKE_USE_DIR=${WORKDIR}/libcxx
+	local BUILD_DIR=${BUILD_DIR}/libcxx
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=
+		-DLIBCXX_ENABLE_SHARED=OFF
+		-DLIBCXX_ENABLE_STATIC=ON
+		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
+		-DLIBCXX_CXX_ABI=libcxxabi
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${S}"/include
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=OFF
+		-DLIBCXX_INCLUDE_TESTS=OFF
+	)
+
+	cmake_src_configure
+	cmake_src_compile
+}
+
+multilib_src_test() {
+	# build a local copy of libc++ for testing to avoid circular dep
+	build_libcxx
+	mv "${BUILD_DIR}"/libcxx/lib/libc++* "${BUILD_DIR}/$(get_libdir)/" || die
+
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-cxxabi
+}
+
+multilib_src_install_all() {
+	insinto /usr/include/libcxxabi
+	doins -r include/.
+}
diff --git a/sys-libs/libomp/libomp-13.0.0.9999.ebuild b/sys-libs/libomp/libomp-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..d55fd49f4e7e
--- /dev/null
+++ b/sys-libs/libomp/libomp-13.0.0.9999.ebuild
@@ -0,0 +1,105 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+CMAKE_ECLASS=cmake
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake-multilib linux-info llvm.org python-any-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"
+KEYWORDS=""
+IUSE="cuda hwloc kernel_linux offload ompt test"
+# CUDA works only with the x86_64 ABI
+REQUIRED_USE="offload? ( cuda? ( abi_x86_64 ) )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	hwloc? ( sys-apps/hwloc:0=[${MULTILIB_USEDEP}] )
+	offload? (
+		virtual/libelf:=[${MULTILIB_USEDEP}]
+		dev-libs/libffi:=[${MULTILIB_USEDEP}]
+		cuda? ( dev-util/nvidia-cuda-toolkit:= )
+	)"
+# tests:
+# - dev-python/lit provides the test runner
+# - sys-devel/llvm provide test utils (e.g. FileCheck)
+# - sys-devel/clang provides the compiler to run tests
+DEPEND="${RDEPEND}"
+BDEPEND="dev-lang/perl
+	offload? ( virtual/pkgconfig )
+	test? (
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+		>=sys-devel/clang-6
+	)"
+
+LLVM_COMPONENTS=( openmp llvm/include )
+llvm.org_set_globals
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+kernel_pds_check() {
+	if use kernel_linux && kernel_is -lt 4 15 && kernel_is -ge 4 13; then
+		local CONFIG_CHECK="~!SCHED_PDS"
+		local ERROR_SCHED_PDS="\
+PDS scheduler versions >= 0.98c < 0.98i (e.g. used in kernels >= 4.13-pf11
+< 4.14-pf9) do not implement sched_yield() call which may result in horrible
+performance problems with libomp. If you are using one of the specified
+kernel versions, you may want to disable the PDS scheduler."
+
+		check_extra_config
+	fi
+}
+
+pkg_pretend() {
+	kernel_pds_check
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+multilib_src_configure() {
+	local libdir="$(get_libdir)"
+	local mycmakeargs=(
+		-DOPENMP_LIBDIR_SUFFIX="${libdir#lib}"
+
+		-DLIBOMP_USE_HWLOC=$(usex hwloc)
+		-DLIBOMP_OMPT_SUPPORT=$(usex ompt)
+
+		-DOPENMP_ENABLE_LIBOMPTARGET=$(usex offload)
+
+		# 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 offload && mycmakeargs+=(
+		# this is non-fatal and libomp checks for CUDA conditionally
+		# to ABI, so we can just ignore passing the wrong value
+		# on non-amd64 ABIs
+		-DCMAKE_DISABLE_FIND_PACKAGE_CUDA=$(usex !cuda)
+	)
+	use test && mycmakeargs+=(
+		# this project does not use standard LLVM cmake macros
+		-DOPENMP_LLVM_LIT_EXECUTABLE="${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
+}
diff --git a/sys-libs/llvm-libunwind/llvm-libunwind-13.0.0.9999.ebuild b/sys-libs/llvm-libunwind/llvm-libunwind-13.0.0.9999.ebuild
new file mode 100644
index 000000000000..37357781fb44
--- /dev/null
+++ b/sys-libs/llvm-libunwind/llvm-libunwind-13.0.0.9999.ebuild
@@ -0,0 +1,124 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+CMAKE_ECLASS=cmake
+PYTHON_COMPAT=( python3_{6..9} )
+inherit cmake-multilib llvm llvm.org python-any-r1
+
+DESCRIPTION="C++ runtime stack unwinder from LLVM"
+HOMEPAGE="https://github.com/llvm-mirror/libunwind"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS=""
+IUSE="debug +static-libs test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="!sys-libs/libunwind"
+# llvm-6 for new lit options
+DEPEND="
+	>=sys-devel/llvm-6"
+BDEPEND="
+	test? ( >=sys-devel/clang-3.9.0
+		$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
+	)"
+
+LLVM_COMPONENTS=( libunwind )
+LLVM_TEST_COMPONENTS=( libcxx{,abi} llvm/cmake )
+llvm.org_set_globals
+
+python_check_deps() {
+	has_version "dev-python/lit[${PYTHON_USEDEP}]"
+}
+
+pkg_setup() {
+	use test && python-any-r1_pkg_setup
+}
+
+multilib_src_configure() {
+	local libdir=$(get_libdir)
+
+	local mycmakeargs=(
+		-DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+		-DLIBUNWIND_ENABLE_ASSERTIONS=$(usex debug)
+		-DLIBUNWIND_ENABLE_STATIC=$(usex static-libs)
+		-DLLVM_INCLUDE_TESTS=$(usex test)
+
+		# support non-native unwinding; given it's small enough,
+		# enable it unconditionally
+		-DLIBUNWIND_ENABLE_CROSS_UNWINDING=ON
+	)
+	if use test; then
+		local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
+		[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
+
+		mycmakeargs+=(
+			-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
+			-DLLVM_LIT_ARGS="$(get_lit_flags);--param=cxx_under_test=${clang_path}"
+			-DLIBUNWIND_LIBCXX_PATH="${WORKDIR}/libcxx"
+		)
+	fi
+
+	cmake_src_configure
+}
+
+build_libcxxabi() {
+	local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/$(get_libdir)"
+	local CMAKE_USE_DIR=${WORKDIR}/libcxxabi
+	local BUILD_DIR=${BUILD_DIR}/libcxxabi
+	local mycmakeargs=(
+		-DLIBCXXABI_LIBDIR_SUFFIX=
+		-DLIBCXXABI_ENABLE_SHARED=OFF
+		-DLIBCXXABI_ENABLE_STATIC=ONF
+		-DLIBCXXABI_USE_LLVM_UNWINDER=ON
+		-DLIBCXXABI_INCLUDE_TESTS=OFF
+
+		-DLIBCXXABI_LIBCXX_INCLUDES="${WORKDIR}"/libcxx/include
+		-DLIBCXXABI_LIBUNWIND_INCLUDES="${S}"/include
+	)
+
+	cmake_src_configure
+	cmake_src_compile
+}
+
+build_libcxx() {
+	local -x LDFLAGS="${LDFLAGS} -L${BUILD_DIR}/libcxxabi/lib -L${BUILD_DIR}/$(get_libdir)"
+	local CMAKE_USE_DIR=${WORKDIR}/libcxx
+	local BUILD_DIR=${BUILD_DIR}/libcxx
+	local mycmakeargs=(
+		-DLIBCXX_LIBDIR_SUFFIX=
+		-DLIBCXX_ENABLE_SHARED=OFF
+		-DLIBCXX_ENABLE_STATIC=ON
+		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF
+		-DLIBCXXABI_USE_LLVM_UNWINDER=ON
+		-DLIBCXX_CXX_ABI=libcxxabi
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS="${WORKDIR}"/libcxxabi/include
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
+		-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
+		-DLIBCXX_HAS_GCC_S_LIB=OFF
+		-DLIBCXX_INCLUDE_TESTS=OFF
+	)
+
+	cmake_src_configure
+	cmake_src_compile
+}
+
+multilib_src_test() {
+	# build local copies of libc++ & libc++abi for testing to avoid
+	# circular deps
+	build_libcxxabi
+	build_libcxx
+	mv "${BUILD_DIR}"/libcxx*/lib/libc++* "${BUILD_DIR}/$(get_libdir)/" || die
+
+	local -x LIT_PRESERVES_TMP=1
+	cmake_build check-unwind
+}
+
+multilib_src_install() {
+	cmake_src_install
+
+	# install headers like sys-libs/libunwind
+	doheader "${S}"/include/*.h
+}
diff --git a/www-client/vivaldi-snapshot/Manifest b/www-client/vivaldi-snapshot/Manifest
index 033cb3960f0c..d1eeac4f33b2 100644
--- a/www-client/vivaldi-snapshot/Manifest
+++ b/www-client/vivaldi-snapshot/Manifest
@@ -1,8 +1,8 @@
-DIST vivaldi-snapshot_3.6.2165.22-1_amd64.deb 77580020 BLAKE2B a35e59be7501e6dd0ff54116d21856c2887aa4cd6cb1f45e73c3c7f2b88c1f299619b8bfbacc994a286af51a09a48d3814dbf2670048b1588457f14cb461ad8c SHA512 a2b0c8e995cbd3c58c1cd93ee9f7c2a7ba29a1f4f7e1d7fdcbfba958c1569b823945cdbda29bc76a1c0c9160f34f84be3e9d4ad41b890319d4a0ae2fadb3a9b4
-DIST vivaldi-snapshot_3.6.2165.22-1_arm64.deb 69778528 BLAKE2B 948be83d7b8422b1482f1a837147d190caac30d1bb10b4a3a5dc8636f347da6f41da51332087239ffdf3428333d731a503de162ade5c59aa46657244503c0827 SHA512 9722f7625af7669348e5e241895fed469a76f398347e5f3f976320664550fc0d64c10c5944dfe68957a45f5f34afaafa1e78623ba20ec3ca008ef3ad13058c52
-DIST vivaldi-snapshot_3.6.2165.22-1_armhf.deb 68599120 BLAKE2B e594ec892c437016bf6be06b516b09167baeaea0def10deaf983f4eded12adb031b6c82806ce088a3557b3af048945e23be56cc4e5ea842da177a940d1cf1b82 SHA512 16e8255e3650a54d747ff2a30f6a41d717ac5969bc672068a13d13c7ca4341bccb147c688d68673cab33166fc3fdaad0c1e164771b81abab7bcc5290d7ab104c
-DIST vivaldi-snapshot_3.6.2165.22-1_i386.deb 74260324 BLAKE2B d2ac290079a5186ee6a2ee3902140b9a8e7e481c6083726584a722b032f23561a33517d4d91592edb5523c59e3f60f3759c925aff704c6009aca73b4be4229e7 SHA512 4627e881b17600a7d49f493be2365070161b6c86eb71c56862ad2dfaee2ca71e46f7db9b182342c36e51c7f4d5dcbfff538035fe321399d0ef64ad286451c8d7
 DIST vivaldi-snapshot_3.6.2165.26-1_amd64.deb 77534968 BLAKE2B c8fcd5a48f6657289438ba0289a01e3a501510a868a523675c5481335351fefcda2ce972042eb121f488b2b16b7ffe738b8a87ae24d62436a77ebb17480441e2 SHA512 9b6dc9bad55280e79b02ebc70357e9cf4a364249e924c1c744d1748589dda25f29c483f83091823362d4248cd495a54ec11b9992d41e0c351810ef9017fad155
 DIST vivaldi-snapshot_3.6.2165.26-1_arm64.deb 69807004 BLAKE2B 621675672e6b151a9ec8061f170ac885d151872a334a8ae4ac117f4a640f7a093e30828f1cd95e03e105545790a649b5e668b1dbe663969311df111306f25fe4 SHA512 ef5c098aab49074f5c3c360a9d44929d8e8517f8eaf85d9afca2e46fcecb302f8fac1bb1b37ab1273c764a9c837034992f5d2f963b0b3a43863e1a6e994080cd
 DIST vivaldi-snapshot_3.6.2165.26-1_armhf.deb 68608692 BLAKE2B 0e54dc2c5f8b8ec238d0de7c79c40316b0f6005df43fc37ace484f4bf048e305be321d880a513c97c3dacd8797229d279c08dfe63a8c7307fe15ba60f935c2c7 SHA512 e2d19ccabea4fde8fab3a2589ef4e8361d4fcd4f964b8254d929822d67cc8a6667356f2131526b124537fc688b18a781833a2c5b07bd14c3f0877f990136e6b2
 DIST vivaldi-snapshot_3.6.2165.26-1_i386.deb 74265460 BLAKE2B f285f0b257adb6944c4d05a414b7d9cc404c79555defb5823ccf449b426ba7e9bb5e55cdf2897122d30f0ee971e004c1042ef1428390663a5f193dbb9a7fe490 SHA512 040b5a80fc18e45dd1b4a1f5f7e30b430ef3a28c09e0158f48ca4deb7c408ee27db525602d9cf0d48c51c7c37ad50c44e7a7010b15e4691c48e270c75e1cf2fd
+DIST vivaldi-snapshot_3.6.2165.32-1_amd64.deb 77537504 BLAKE2B 5104b2ca7878512afb5c38e242c7e38660365445d4e6d9b0e12e44104f2ee91142d7f935131829a4a6faca778dc753478ea78f35734566a12d50b2778d1f34a1 SHA512 a05ab34c4e22c36571a944510274706980c1b2d9461f36646164393af4bde130db6e906bef6514cfa201e2d06da1e6b8317a54fe65099b21120d5f74e7ba9ddb
+DIST vivaldi-snapshot_3.6.2165.32-1_arm64.deb 69777460 BLAKE2B 3bd957ecd1547d79183b955ecbc8aa6d53e9966c8f03810b5f40ac91b5752022f6c91111ab3680f220ba1f8ac1a7748f366a5b0a26ce528fa00cb1be87ec4b3a SHA512 98f2061f5f32be702e55927e58ef8af03bbb5f16c2d6fbd9f4959b9b9732313c3663f4b720243505fbff3f58677a06e49957754efb03fa28b02065edbe338682
+DIST vivaldi-snapshot_3.6.2165.32-1_armhf.deb 68597612 BLAKE2B de4c564394972fb9a85b02541adc67c0841b0b21c00367883527e383af80988969ab6a9c0abc64bb55a7ecad83a1b626f8a62ae383d7818e464f9aac1a3b78af SHA512 efa2a53144791e1bf42515932cc08b3308755feb797c00d64a283880b4c0e9d2aefaa0d7fd0d44eb3354e3bf289b0a087381af62202430dcf0fbae9e58c5a2d8
+DIST vivaldi-snapshot_3.6.2165.32-1_i386.deb 73641588 BLAKE2B 49c95c3d8cd90d1eb69b46df7e99cc5a267a6e0f1ea051e011f9e032fb130b4db63b542015192ebac72840aed11abb650d0b221b84b387cbf72ca4e1432d0bfd SHA512 5dda40708f005862ae214a87d14f5f88f3673615402f07fb1c3317d40cdfb922ace38d897ec3bf88a0975b3f95045cf4d7022a3a3e06fc8edf49c85e9990b68f
diff --git a/www-client/vivaldi-snapshot/vivaldi-snapshot-3.6.2165.22.ebuild b/www-client/vivaldi-snapshot/vivaldi-snapshot-3.6.2165.32.ebuild
index e3d12da4e30f..e3d12da4e30f 100644
--- a/www-client/vivaldi-snapshot/vivaldi-snapshot-3.6.2165.22.ebuild
+++ b/www-client/vivaldi-snapshot/vivaldi-snapshot-3.6.2165.32.ebuild
diff --git a/www-client/vivaldi/Manifest b/www-client/vivaldi/Manifest
index 94c325fbf8ac..51da53132a07 100644
--- a/www-client/vivaldi/Manifest
+++ b/www-client/vivaldi/Manifest
@@ -2,3 +2,7 @@ DIST vivaldi-stable_3.5.2115.87-1_amd64.deb 76844616 BLAKE2B 1d9f78740bb778b9b17
 DIST vivaldi-stable_3.5.2115.87-1_arm64.deb 69043804 BLAKE2B bcb038c7db98183cec134a5aa2b78209b1b918dfd8044e8078ffab8750ce0d065d51311bca724411437e289f63fa86fa062785eb2d7f4cf49e9ebeacc6a793e1 SHA512 ca6cfffc993fc218bfe1da8f4c1997689eb96204e72deacb6dd5ed64173877d9418cfed52b431b1e22afa4258da85823ebb9e37a76a195e7fc2f1f9dc8616b0f
 DIST vivaldi-stable_3.5.2115.87-1_armhf.deb 68135616 BLAKE2B fffebd9b53796fdc201297e7d18132fab48ad7c5960c3ea5304e5498357bdc9120b09293e283974c135da07362d42efdd5ff0336512117fbbd5ce3c8f4f38c15 SHA512 331ad6a7f91c632efb269d469f017e4cfb80d487cf206890758f244d1be6041dd8b5145dd07238f1402c1bef050b3c411ef019ea300869d3a41da12089e7ef54
 DIST vivaldi-stable_3.5.2115.87-1_i386.deb 73585364 BLAKE2B e8d23692931623fc444b28db3dd324fe3d5a322788eda16beaa4049f625358088faa6d56bad6b69f7d0bad9c3a2e60879cf4188e4270255aa3783ef20fa2c389 SHA512 02b87bb42a8c061b762c7bc8f8c2ddd7648909158a4ed426a63aa6552bf5a58c77448a8d08688c29d4d271f41de51ac69d8ff60b21be9d15dbbc124b871e88b6
+DIST vivaldi-stable_3.6.2165.34-1_amd64.deb 77533024 BLAKE2B 01fe76bbdb6b75328a75ab8aee5d76936802b6beb20fa5cd6feba552b04b5a3c1ffd350147cc55a97a8e259db7063f2ea9b247a5df7e4d27cd791339187c5457 SHA512 65e3caf0a12804b5777349d68e498636e0bbe7018856f14f262c0a8cf43f39cd91cbcf6b55a305b4bbd85b06d91c60fdb3d8d033750ecd512fc489b78210bcd0
+DIST vivaldi-stable_3.6.2165.34-1_arm64.deb 69789900 BLAKE2B 9180187ebd5ad0a228d591f6558c57bf4bbfa1517c5a3478db7be8d9916dbe57928bd2606811e351e7f2c0bfa5aa3afca63e81832d4fcf9b6faff3f0d1111e61 SHA512 8cfba43563dc15514f0e9ff9d12126e508a7a6bb77f66efd61c635de7a26a97b0037c33d31b6316db9087b656d5b05c491f10ce86a39263a652d2e59856ff47a
+DIST vivaldi-stable_3.6.2165.34-1_armhf.deb 68614424 BLAKE2B d21c9f9766eef38337121372f4307c12f2f4924ae14f33910c7faf85137ea7f7760fbe1543b31a66dfde129a648158cd50816bb45a9cef5a305904068948018c SHA512 0a4e04b0f5764950bc73b8b33d692e2e017df7439a0f6fccb5735e312b5c150c0a23c6a6ce0dc712716fff40e7f76cc92a62e0fd7b70009987840f9efd3a98b9
+DIST vivaldi-stable_3.6.2165.34-1_i386.deb 74272560 BLAKE2B d5764401a1ea590e0e897713799776ce7b8615a19ea3e27b02b7f04cbd14d4f45b1182cc5e4cca830716d8a03e3bfbc4fdc66d4b424ce32a7240074e72e6f95c SHA512 f6a98e3472c484d2d5dd25b164ea2538b1fb451cfc0f42bf23dd140f032e7616c89f257700752a5b21b47d80af03aa23731872f75b1a6e19a22de6dab1a6ab0a
diff --git a/www-client/vivaldi/vivaldi-3.6.2165.34.ebuild b/www-client/vivaldi/vivaldi-3.6.2165.34.ebuild
new file mode 100644
index 000000000000..e3d12da4e30f
--- /dev/null
+++ b/www-client/vivaldi/vivaldi-3.6.2165.34.ebuild
@@ -0,0 +1,202 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+CHROMIUM_LANGS="
+	af
+	am
+	ar
+	be
+	bg
+	bn
+	ca
+	cs
+	da
+	de
+	de-CH
+	el
+	en-GB
+	en-US
+	eo
+	es
+	es-419
+	es-PE
+	et
+	eu
+	fa
+	fi
+	fil
+	fr
+	fy
+	gd
+	gl
+	gu
+	he
+	hi
+	hr
+	hu
+	hy
+	id
+	io
+	is
+	it
+	ja
+	jbo
+	ka
+	kn
+	ko
+	ku
+	lt
+	lv
+	mk
+	ml
+	mr
+	ms
+	nb
+	nl
+	nn
+	pl
+	pt-BR
+	pt-PT
+	ro
+	ru
+	sc
+	sk
+	sl
+	sq
+	sr
+	sv
+	sw
+	ta
+	te
+	th
+	tr
+	uk
+	vi
+	zh-CN
+	zh-TW
+"
+
+inherit chromium-2 desktop unpacker xdg
+
+VIVALDI_PN="${PN/%vivaldi/vivaldi-stable}"
+VIVALDI_HOME="opt/${PN}"
+DESCRIPTION="A browser for our friends"
+HOMEPAGE="https://vivaldi.com/"
+
+if [[ ${PV} = *_p* ]]; then
+	DEB_REV="${PV#*_p}"
+else
+	DEB_REV=1
+fi
+
+VIVALDI_BASE_URI="https://downloads.vivaldi.com/${VIVALDI_PN#vivaldi-}/${VIVALDI_PN}_${PV%_p*}-${DEB_REV}_"
+SRC_URI="
+	amd64? ( ${VIVALDI_BASE_URI}amd64.deb )
+	arm64? ( ${VIVALDI_BASE_URI}arm64.deb )
+	arm? ( ${VIVALDI_BASE_URI}armhf.deb )
+	x86? ( ${VIVALDI_BASE_URI}i386.deb )
+"
+
+LICENSE="Vivaldi"
+SLOT="0"
+KEYWORDS="-* ~amd64 ~arm ~arm64 ~x86"
+IUSE="proprietary-codecs widevine"
+RESTRICT="bindist mirror"
+
+RDEPEND="
+	dev-libs/expat
+	dev-libs/glib:2
+	dev-libs/nspr
+	dev-libs/nss
+	media-libs/alsa-lib
+	media-libs/fontconfig
+	media-libs/freetype
+	media-libs/speex
+	net-print/cups
+	sys-apps/dbus
+	sys-libs/libcap
+	x11-libs/cairo
+	x11-libs/gdk-pixbuf
+	x11-libs/gtk+:3
+	x11-libs/libX11
+	x11-libs/libXScrnSaver
+	x11-libs/libXcomposite
+	x11-libs/libXcursor
+	x11-libs/libXdamage
+	x11-libs/libXext
+	x11-libs/libXfixes
+	x11-libs/libXi
+	x11-libs/libXrandr
+	x11-libs/libXrender
+	x11-libs/libXtst
+	x11-libs/pango[X]
+	proprietary-codecs? ( media-video/ffmpeg:0/56.58.58[chromium(-)] )
+	widevine? ( www-plugins/chrome-binary-plugins )
+"
+
+QA_PREBUILT="*"
+S="${WORKDIR}"
+
+src_unpack() {
+	unpack_deb ${A}
+}
+
+src_prepare() {
+	# Rename docs directory to our needs.
+	mv usr/share/doc/{${VIVALDI_PN},${PF}}/ || die
+
+	# Decompress the docs.
+	gunzip usr/share/doc/${PF}/changelog.gz || die
+
+	# The appdata directory is deprecated.
+	mv usr/share/{appdata,metainfo}/ || die
+
+	# Remove cron job for updating from Debian repos.
+	rm etc/cron.daily/${PN} ${VIVALDI_HOME}/cron/${PN} || die
+	rmdir etc/{cron.daily/,} ${VIVALDI_HOME}/cron/ || die
+
+	# Remove scripts that will most likely break things.
+	rm ${VIVALDI_HOME}/update-{ffmpeg,widevine} || die
+
+	pushd ${VIVALDI_HOME}/locales > /dev/null || die
+	rm ja-KS.pak || die # No flag for Kansai as not in IETF list.
+	chromium_remove_language_paks
+	popd > /dev/null || die
+
+	if use proprietary-codecs; then
+		rm ${VIVALDI_HOME}/lib/libffmpeg.so || die
+		rmdir ${VIVALDI_HOME}/lib || die
+	fi
+
+	eapply_user
+}
+
+src_install() {
+	mv */ "${D}" || die
+	dosym /${VIVALDI_HOME}/${PN} /usr/bin/${PN}
+	fperms 4711 /${VIVALDI_HOME}/vivaldi-sandbox
+
+	local logo size
+	for logo in "${ED}"/${VIVALDI_HOME}/product_logo_*.png; do
+		size=${logo##*_}
+		size=${size%.*}
+		newicon -s "${size}" "${logo}" ${PN}.png
+	done
+
+	if use proprietary-codecs; then
+		dosym ../../usr/$(get_libdir)/chromium/libffmpeg.so \
+			  /${VIVALDI_HOME}/libffmpeg.so.$(ver_cut 1-2)
+	fi
+
+	if use widevine; then
+		dosym ../../usr/$(get_libdir)/chromium-browser/WidevineCdm \
+			  /${VIVALDI_HOME}/WidevineCdm
+	else
+		rm "${ED}"/${VIVALDI_HOME}/WidevineCdm || die
+	fi
+
+	[[ ${PN} = vivaldi-snapshot ]] &&
+		dosym ${PN} /${VIVALDI_HOME}/vivaldi
+}