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path: root/www-client/chromium/chromium-131.0.6738.0.ebuild
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# Copyright 2009-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8
PYTHON_COMPAT=( python3_{9..12} )
PYTHON_REQ_USE="xml(+)"
LLVM_MAX_SLOT=19
RUST_MIN_VER=1.72.0

CHROMIUM_LANGS="af am ar bg bn ca cs da de el en-GB es es-419 et fa fi fil fr gu he
	hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr
	sv sw ta te th tr uk ur vi zh-CN zh-TW"

VIRTUALX_REQUIRED="pgo"

inherit check-reqs chromium-2 desktop flag-o-matic llvm ninja-utils pax-utils
inherit python-any-r1 qmake-utils readme.gentoo-r1 toolchain-funcs virtualx xdg-utils

DESCRIPTION="Open-source version of Google Chrome web browser"
HOMEPAGE="https://chromium.org/"
SRC_URI="https://commondatastorage.googleapis.com/chromium-browser-official/${P}.tar.xz
	pgo? ( https://github.com/elkablo/chromium-profiler/releases/download/v0.2/chromium-profiler-0.2.tar )"

LICENSE="BSD"
SLOT="0/dev"
KEYWORDS="~amd64 ~arm64"
IUSE="+X component-build cups cpu_flags_arm_neon debug gtk4 +hangouts headless +js-type-check kerberos libcxx lto +official pgo pic +proprietary-codecs pulseaudio qt5 screencast selinux +suid +system-av1 +system-ffmpeg +system-harfbuzz +system-icu +system-png vaapi wayland widevine"
REQUIRED_USE="
	component-build? ( !suid !libcxx )
	screencast? ( wayland )
	!headless? ( || ( X wayland ) )
	pgo? ( X !wayland )
"

COMMON_X_DEPEND="
	x11-libs/libXcomposite:=
	x11-libs/libXcursor:=
	x11-libs/libXdamage:=
	x11-libs/libXfixes:=
	>=x11-libs/libXi-1.6.0:=
	x11-libs/libXrandr:=
	x11-libs/libXrender:=
	x11-libs/libXtst:=
	x11-libs/libxshmfence:=
"

COMMON_SNAPSHOT_DEPEND="
	system-icu? ( >=dev-libs/icu-71.1:= )
	>=dev-libs/libxml2-2.9.4-r3:=[icu]
	dev-libs/nspr:=
	>=dev-libs/nss-3.26:=
	!libcxx? ( >=dev-libs/re2-0.2019.08.01:= )
	dev-libs/libxslt:=
	media-libs/fontconfig:=
	>=media-libs/freetype-2.11.0-r1:=
	system-harfbuzz? ( >=media-libs/harfbuzz-3:0=[icu(-)] )
	media-libs/libjpeg-turbo:=
	system-png? ( media-libs/libpng:=[-apng(-)] )
	>=media-libs/libwebp-0.4.0:=
	media-libs/mesa:=[gbm(+)]
	>=media-libs/openh264-1.6.0:=
	system-av1? (
		>=media-libs/dav1d-1.0.0:=
		>=media-libs/libaom-3.4.0:=
	)
	sys-libs/zlib:=
	x11-libs/libdrm:=
	!headless? (
		dev-libs/glib:2
		>=media-libs/alsa-lib-1.0.19:=
		pulseaudio? ( media-sound/pulseaudio:= )
		sys-apps/pciutils:=
		kerberos? ( virtual/krb5 )
		vaapi? ( >=media-libs/libva-2.7:=[X?,wayland?] )
		X? (
			x11-libs/libX11:=
			x11-libs/libXext:=
			x11-libs/libxcb:=
		)
		x11-libs/libxkbcommon:=
		wayland? (
			dev-libs/libffi:=
			screencast? ( media-video/pipewire:= )
		)
	)
"

COMMON_DEPEND="
	${COMMON_SNAPSHOT_DEPEND}
	app-arch/bzip2:=
	dev-libs/expat:=
	system-ffmpeg? (
		>=media-video/ffmpeg-4.3:=
		|| (
			media-video/ffmpeg[-samba]
			>=net-fs/samba-4.5.10-r1[-debug(-)]
		)
		>=media-libs/opus-1.3.1:=
	)
	net-misc/curl[ssl]
	sys-apps/dbus:=
	media-libs/flac:=
	sys-libs/zlib:=[minizip]
	!headless? (
		X? ( ${COMMON_X_DEPEND} )
		>=app-accessibility/at-spi2-core-2.46.0:2
		media-libs/mesa:=[X?,wayland?]
		cups? ( >=net-print/cups-1.3.11:= )
		virtual/udev
		x11-libs/cairo:=
		x11-libs/gdk-pixbuf:2
		x11-libs/pango:=
		qt5? (
			dev-qt/qtcore:5
			dev-qt/qtwidgets:5
		)
	)
"
RDEPEND="${COMMON_DEPEND}
	!headless? (
		|| (
			x11-libs/gtk+:3[X?,wayland?]
			gui-libs/gtk:4[X?,wayland?]
		)
		qt5? ( dev-qt/qtgui:5[X?,wayland?] )
	)
	virtual/ttf-fonts
	selinux? ( sec-policy/selinux-chromium )
"
DEPEND="${COMMON_DEPEND}
	!headless? (
		gtk4? ( gui-libs/gtk:4[X?,wayland?] )
		!gtk4? ( x11-libs/gtk+:3[X?,wayland?] )
	)
"

depend_clang_llvm_version() {
	echo "sys-devel/clang:$1"
	echo "sys-devel/llvm:$1"
	echo "=sys-devel/lld-$1*"
}

depend_clang_llvm_versions() {
	local _v
	if [[ $# -gt 1 ]]; then
		echo "|| ("
		for _v in "$@"; do
			echo "("
			depend_clang_llvm_version "${_v}"
			echo ")"
		done
		echo ")"
	elif [[ $# -eq 1 ]]; then
		depend_clang_llvm_version "$1"
	fi
}

BDEPEND="
	${COMMON_SNAPSHOT_DEPEND}
	${PYTHON_DEPS}
	$(python_gen_any_dep '
		dev-python/setuptools[${PYTHON_USEDEP}]
	')
	>=app-arch/gzip-1.7
	!headless? (
		qt5? ( dev-qt/qtcore:5 )
	)
	libcxx? ( >=sys-devel/clang-13 )
	lto? ( $(depend_clang_llvm_versions 17) )
	pgo? (
		>=dev-python/selenium-3.141.0
		>=dev-util/web_page_replay_go-20220314
		$(depend_clang_llvm_versions 17)
	)
	>=dev-lang/rust-${RUST_MIN_VER}[profiler]
	dev-util/bindgen
	dev-lang/perl
	>=dev-build/gn-0.2122
	>=dev-util/gperf-3.0.3
	>=dev-build/ninja-1.7.2
	dev-vcs/git
	>=net-libs/nodejs-7.6.0[inspector]
	>=sys-devel/bison-2.4.3
	sys-devel/flex
	virtual/pkgconfig
	js-type-check? ( virtual/jre )
"

# These are intended for ebuild maintainer use to force clang if GCC is broken.
: ${CHROMIUM_FORCE_CLANG=yes}

if [[ ${CHROMIUM_FORCE_CLANG} == yes ]]; then
	BDEPEND+=" >=sys-devel/clang-13"
fi

if ! has chromium_pkg_die ${EBUILD_DEATH_HOOKS}; then
	EBUILD_DEATH_HOOKS+=" chromium_pkg_die";
fi

DISABLE_AUTOFORMATTING="yes"
DOC_CONTENTS="
Some web pages may require additional fonts to display properly.
Try installing some of the following packages if some characters
are not displayed properly:
- media-fonts/arphicfonts
- media-fonts/droid
- media-fonts/ipamonafont
- media-fonts/noto
- media-fonts/ja-ipafonts
- media-fonts/takao-fonts
- media-fonts/wqy-microhei
- media-fonts/wqy-zenhei

To fix broken icons on the Downloads page, you should install an icon
theme that covers the appropriate MIME types, and configure this as your
GTK+ icon theme.

For native file dialogs in KDE, install kde-apps/kdialog.

To make password storage work with your desktop environment you may
have install one of the supported credentials management applications:
- app-crypt/libsecret (GNOME)
- kde-frameworks/kwallet (KDE)
If you have one of above packages installed, but don't want to use
them in Chromium, then add --password-store=basic to CHROMIUM_FLAGS
in /etc/chromium/default.
"

python_check_deps() {
	python_has_version "dev-python/setuptools[${PYTHON_USEDEP}]"
}

needs_clang() {
	[[ ${CHROMIUM_FORCE_CLANG} == yes ]] || use libcxx || use lto || use pgo
}

llvm_check_deps() {
	if ! has_version -b "sys-devel/clang:${LLVM_SLOT}" ; then
		einfo "sys-devel/clang:${LLVM_SLOT} is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
		return 1
	fi

	if ( use lto || use pgo ) && ! has_version -b "=sys-devel/lld-${LLVM_SLOT}*" ; then
		einfo "=sys-devel/lld-${LLVM_SLOT}* is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
		return 1
	fi

	einfo "Using LLVM slot ${LLVM_SLOT} to build" >&2
}

pre_build_checks() {
	if [[ ${MERGE_TYPE} != binary ]]; then
		[[ ${EBUILD_PHASE_FUNC} == pkg_setup ]] && ( use lto || use pgo ) && llvm_pkg_setup

		local -x CPP="$(tc-getCXX) -E"
		if tc-is-gcc && ! ver_test "$(gcc-version)" -ge 10.4; then
			die "At least gcc 10.4 is required"
		fi
		if use pgo && tc-is-cross-compiler; then
			die "The pgo USE flag cannot be used when cross-compiling"
		fi
		if needs_clang || tc-is-clang; then
			tc-is-cross-compiler && CPP=${CBUILD}-clang++ || CPP=${CHOST}-clang++
			CPP+=" -E"
			if ! ver_test "$(clang-major-version)" -ge 13; then
				die "At least clang 13 is required"
			fi
		fi
		if [[ ${EBUILD_PHASE_FUNC} == pkg_setup ]] && use js-type-check; then
			"${BROOT}"/usr/bin/java -version 2>1 > /dev/null || die "Java VM not setup correctly"
		fi
	fi

	# Check build requirements, bug #541816 and bug #471810 .
	CHECKREQS_MEMORY="4G"
	CHECKREQS_DISK_BUILD="12G"
	tc-is-cross-compiler && CHECKREQS_DISK_BUILD="14G"
	if use lto || use pgo; then
		CHECKREQS_MEMORY="9G"
		CHECKREQS_DISK_BUILD="13G"
		tc-is-cross-compiler && CHECKREQS_DISK_BUILD="16G"
		use pgo && CHECKREQS_DISK_BUILD="20G"
	fi
	if is-flagq '-g?(gdb)?([1-9])'; then
		if use custom-cflags || use component-build; then
			CHECKREQS_DISK_BUILD="25G"
		fi
		if ! use component-build; then
			CHECKREQS_MEMORY="16G"
		fi
	fi
	check-reqs_${EBUILD_PHASE_FUNC}
}

pkg_pretend() {
	pre_build_checks

	if use headless; then
		local headless_unused_flags=("cups" "kerberos" "pulseaudio" "qt5" "vaapi" "wayland")
		for myiuse in ${headless_unused_flags[@]}; do
			use ${myiuse} && ewarn "Ignoring USE=${myiuse} since USE=headless is set."
		done
	fi
}

pkg_setup() {
	pre_build_checks

	chromium_suid_sandbox_check_kernel_config

	# nvidia-drivers does not work correctly with Wayland due to unsupported EGLStreams
	if use wayland && ! use headless && has_version "x11-drivers/nvidia-drivers"; then
		ewarn "Proprietary nVidia driver does not work with Wayland. You can disable"
		ewarn "Wayland by setting DISABLE_OZONE_PLATFORM=true in /etc/chromium/default."
	fi
}

src_prepare() {
	# Calling this here supports resumption via FEATURES=keepwork
	python_setup

	local PATCHES=(
		"${FILESDIR}/chromium-105-protobuf-RepeatedPtrField-export.patch"
		"${FILESDIR}/chromium-131-compiler.patch"
		"${FILESDIR}/chromium-119-minizip.patch"
		"${FILESDIR}/chromium-118-material-color-utils.patch"
		"${FILESDIR}/chromium-126-freetype-blink.patch"
		"${FILESDIR}/chromium-124-metrics-histograms-nodepotbin.patch"
		"${FILESDIR}/chromium-131-text_codec_icu-system-icu.patch"

		"${FILESDIR}/chromium-111-InkDropHost-crash.patch"
		"${FILESDIR}/chromium-131-EnumTable-crash.patch"
		"${FILESDIR}/chromium-131-use-oauth2-client-switches-as-default.patch"
		"${FILESDIR}/chromium-cross-compile.patch"
	)

	sed -i -e \
			"/if (is_clang && toolchain_has_rust) {/,+2d" \
			build/config/compiler/BUILD.gn || die "Failed to disable bundled compiler builtins"
	sed -i -e \
			"/\`--sysroot\` flag/i\ \ \ \ args += [ \"-I\" + rebase_path(sysroot + \"/usr/lib/clang/${LLVM_SLOT}/include/\", root_build_dir) ]" \
			-e \
			"/clang_resource_dir =/,+2d" \
			-e \
			"s/clang_resource_dir,/rebase_path(sysroot + \"\/usr\/lib\/clang\/${LLVM_SLOT}\/\", root_build_dir)/" \
			build/rust/rust_bindgen.gni || die "Failed to append include dir for bindgen"

	default

	#mkdir -p third_party/node/linux/node-linux-x64/bin || die
	#ln -s "${EPREFIX}"/usr/bin/node third_party/node/linux/node-linux-x64/bin/node || die

	# I don't know how to do this properly
	rm -r third_party/rust-toolchain || die
	mkdir -p third_party/rust-toolchain/bin || die
	ln -s "${EPREFIX}"/usr/bin/bindgen third_party/rust-toolchain/bin/bindgen || die
	ln -s "${EPREFIX}/usr/lib/llvm/${LLVM_SLOT}/lib64" third_party/rust-toolchain/lib || die

	# adjust python interpreter version
	sed -i -e "s|\(^script_executable = \).*|\1\"${EPYTHON}\"|g" .gn || die
	sed -i -e "s|vpython3|${EPYTHON}|g" testing/xvfb.py || die

	local keeplibs=(
		base/third_party/cityhash
		base/third_party/double_conversion
		base/third_party/icu
		base/third_party/nspr
		base/third_party/superfasthash
		base/third_party/symbolize
		base/third_party/xdg_user_dirs
		buildtools/third_party/libc++
		buildtools/third_party/libc++abi
		chrome/third_party/mozilla_security_manager
		net/third_party/mozilla_security_manager
		net/third_party/nss
		net/third_party/quic
		net/third_party/uri_template
		third_party/abseil-cpp
		third_party/angle
		third_party/angle/src/common/third_party/xxhash
		third_party/angle/src/third_party/ceval
		third_party/angle/src/third_party/libXNVCtrl
		third_party/angle/src/third_party/volk
		third_party/anonymous_tokens
		third_party/apple_apsl
		third_party/axe-core
		third_party/bidimapper
		third_party/blink
		third_party/boringssl
		third_party/boringssl/src/third_party/fiat
		third_party/breakpad
		third_party/breakpad/breakpad/src/third_party/curl
		third_party/brotli
		third_party/catapult
		third_party/catapult/common/py_vulcanize/third_party/rcssmin
		third_party/catapult/common/py_vulcanize/third_party/rjsmin
		third_party/catapult/third_party/beautifulsoup4-4.9.3
		third_party/catapult/third_party/html5lib-1.1
		third_party/catapult/third_party/polymer
		third_party/catapult/third_party/six
		third_party/catapult/tracing/third_party/d3
		third_party/catapult/tracing/third_party/gl-matrix
		third_party/catapult/tracing/third_party/jpeg-js
		third_party/catapult/tracing/third_party/jszip
		third_party/catapult/tracing/third_party/mannwhitneyu
		third_party/catapult/tracing/third_party/oboe
		third_party/catapult/tracing/third_party/pako
		third_party/ced
		third_party/content_analysis_sdk
		third_party/cld_3
		third_party/closure_compiler
		third_party/cpuinfo
		third_party/crabbyavif
		third_party/crashpad
		third_party/crashpad/crashpad/third_party/lss
		third_party/crashpad/crashpad/third_party/zlib
		third_party/crc32c
		third_party/cros_system_api
		third_party/d3
		third_party/dawn
		third_party/dawn/third_party/gn/webgpu-cts
		third_party/dawn/third_party/khronos
		third_party/depot_tools
		third_party/devscripts
		third_party/devtools-frontend
		third_party/devtools-frontend/src/front_end/third_party/acorn
		third_party/devtools-frontend/src/front_end/third_party/additional_readme_paths.json
		third_party/devtools-frontend/src/front_end/third_party/axe-core
		third_party/devtools-frontend/src/front_end/third_party/chromium
		third_party/devtools-frontend/src/front_end/third_party/codemirror
		third_party/devtools-frontend/src/front_end/third_party/csp_evaluator
		third_party/devtools-frontend/src/front_end/third_party/diff
		third_party/devtools-frontend/src/front_end/third_party/i18n
		third_party/devtools-frontend/src/front_end/third_party/intl-messageformat
		third_party/devtools-frontend/src/front_end/third_party/lighthouse
		third_party/devtools-frontend/src/front_end/third_party/lit
		third_party/devtools-frontend/src/front_end/third_party/marked
		third_party/devtools-frontend/src/front_end/third_party/puppeteer
		third_party/devtools-frontend/src/front_end/third_party/puppeteer/package/lib/esm/third_party/mitt
		third_party/devtools-frontend/src/front_end/third_party/puppeteer/package/lib/esm/third_party/parsel-js
		third_party/devtools-frontend/src/front_end/third_party/puppeteer/package/lib/esm/third_party/rxjs
		third_party/devtools-frontend/src/front_end/third_party/third-party-web
		third_party/devtools-frontend/src/front_end/third_party/vscode.web-custom-data
		third_party/devtools-frontend/src/front_end/third_party/wasmparser
		third_party/devtools-frontend/src/front_end/third_party/web-vitals
		third_party/devtools-frontend/src/third_party
		third_party/distributed_point_functions
		third_party/dom_distiller_js
		third_party/eigen3
		third_party/emoji-segmenter
		third_party/fast_float
		third_party/farmhash
		third_party/fdlibm
		third_party/fft2d
		third_party/flatbuffers
		third_party/fp16
		third_party/freetype
		third_party/fusejs
		third_party/fxdiv
		third_party/highway
		third_party/liburlpattern
		third_party/libzip
		third_party/gemmlowp
		third_party/google_input_tools
		third_party/google_input_tools/third_party/closure_library
		third_party/google_input_tools/third_party/closure_library/third_party/closure
		third_party/googletest
		third_party/hunspell
		third_party/iccjpeg
		third_party/ink
		third_party/inspector_protocol
		third_party/ipcz
		third_party/jinja2
		third_party/jsoncpp
		third_party/jstemplate
		third_party/khronos
		third_party/leveldatabase
		third_party/lens_server_proto
		third_party/libaddressinput
		third_party/libavif
		third_party/libgav1
		third_party/libjingle
		third_party/libphonenumber
		third_party/libsecret
		third_party/libsrtp
		third_party/libsync
		third_party/libva_protected_content
		third_party/libvpx
		third_party/libvpx/source/libvpx/third_party/x86inc
		third_party/libwebm
		third_party/libwebp
		third_party/libx11
		third_party/libxcb-keysyms
		third_party/libxml/chromium
		third_party/libyuv
		third_party/lit
		third_party/llvm
		third_party/lottie
		third_party/lss
		third_party/lzma_sdk
		third_party/mako
		third_party/markupsafe
		third_party/material_color_utilities
		third_party/mesa
		third_party/metrics_proto
		third_party/minigbm
		third_party/modp_b64
		third_party/nasm
		third_party/nearby
		third_party/neon_2_sse
		third_party/node
		third_party/omnibox_proto
		third_party/one_euro_filter
		third_party/openh264
		third_party/openscreen
		third_party/openscreen/src/third_party/tinycbor/src/src
		third_party/ots
		third_party/pdfium
		third_party/pdfium/third_party/agg23
		third_party/pdfium/third_party/bigint
		third_party/pdfium/third_party/freetype
		third_party/pdfium/third_party/lcms
		third_party/pdfium/third_party/libopenjpeg
		third_party/pdfium/third_party/libtiff
		third_party/perfetto
		third_party/perfetto/protos/third_party/chromium
		third_party/perfetto/protos/third_party/simpleperf
		third_party/pffft
		third_party/ply
		third_party/polymer
		third_party/private-join-and-compute
		third_party/private_membership
		third_party/protobuf
		third_party/pthreadpool
		third_party/puffin
		third_party/pyjson5
		third_party/pyyaml
		third_party/qcms
		third_party/rapidhash
		third_party/rnnoise
		third_party/rust
		third_party/s2cellid
		third_party/securemessage
		third_party/selenium-atoms
		third_party/sentencepiece
		third_party/sentencepiece/src/third_party/darts_clone
		third_party/shell-encryption
		third_party/simplejson
		third_party/six
		third_party/skia
		third_party/skia/include/third_party/vulkan
		third_party/skia/third_party/vulkan
		third_party/smhasher
		third_party/snappy
		third_party/spirv-tools
		third_party/spirv-headers
		third_party/sqlite
		third_party/swiftshader
		third_party/swiftshader/third_party/astc-encoder
		third_party/swiftshader/third_party/llvm-subzero
		third_party/swiftshader/third_party/marl
		third_party/swiftshader/third_party/subzero
		third_party/swiftshader/third_party/SPIRV-Headers
		third_party/swiftshader/third_party/SPIRV-Tools
		third_party/tensorflow-text
		third_party/tensorflow_models
		third_party/tflite
		third_party/tflite/src/third_party/xla
		third_party/tflite/src/third_party/xla/third_party/tsl
		third_party/tflite/src/third_party/eigen3
		third_party/tflite/src/third_party/fft2d
		third_party/ruy
		third_party/six
		third_party/ukey2
		third_party/unrar
		third_party/utf
		third_party/vulkan
		third_party/wayland
		third_party/webdriver
		third_party/webgpu-cts
		third_party/webrtc
		third_party/webrtc/common_audio/third_party/ooura
		third_party/webrtc/common_audio/third_party/spl_sqrt_floor
		third_party/webrtc/modules/third_party/fft
		third_party/webrtc/modules/third_party/g711
		third_party/webrtc/modules/third_party/g722
		third_party/webrtc/rtc_base/third_party/base64
		third_party/webrtc/rtc_base/third_party/sigslot
		third_party/widevine
		third_party/woff2
		third_party/wuffs
		third_party/x11proto
		third_party/xcbproto
		third_party/xnnpack
		third_party/zxcvbn-cpp
		third_party/zlib/contrib/minizip
		third_party/zlib/google
		third_party/zstd
		url/third_party/mozilla
		v8/src/third_party/siphash
		v8/src/third_party/valgrind
		v8/src/third_party/utf8-decoder
		v8/third_party/glibc
		v8/third_party/inspector_protocol
		v8/third_party/v8

		# gyp -> gn leftovers
		third_party/libevent
		third_party/speech-dispatcher
		third_party/usb_ids
		third_party/xdg-utils
	)
	if ! use system-ffmpeg; then
		keeplibs+=( third_party/ffmpeg third_party/opus )
	fi
	if ! use system-icu; then
		keeplibs+=( third_party/icu )
	fi
	if ! use system-png; then
		keeplibs+=( third_party/libpng )
	fi
	if ! use system-av1; then
		keeplibs+=(
			third_party/dav1d
			third_party/libaom
			third_party/libaom/source/libaom/third_party/fastfeat
			third_party/libaom/source/libaom/third_party/SVT-AV1
			third_party/libaom/source/libaom/third_party/vector
			third_party/libaom/source/libaom/third_party/x86inc
		)
	fi
	if ! use system-harfbuzz; then
		keeplibs+=( third_party/harfbuzz-ng )
	fi
	if true || use libcxx; then
		keeplibs+=( third_party/re2 )
		keeplibs+=( third_party/libc++ )
	fi
	if use arm64 || use ppc64 ; then
		keeplibs+=( third_party/swiftshader/third_party/llvm-10.0 )
	fi
	# we need to generate ppc64 stuff because upstream does not ship it yet
	# it has to be done before unbundling.
	if use ppc64; then
		pushd third_party/libvpx >/dev/null || die
		mkdir -p source/config/linux/ppc64 || die
		# requires git and clang, bug #832803
		sed -i -e "s|^update_readme||g; s|clang-format|${EPREFIX}/bin/true|g" \
			generate_gni.sh || die
		./generate_gni.sh || die
		popd >/dev/null || die

		pushd third_party/ffmpeg >/dev/null || die
		cp libavcodec/ppc/h264dsp.c libavcodec/ppc/h264dsp_ppc.c || die
		cp libavcodec/ppc/h264qpel.c libavcodec/ppc/h264qpel_ppc.c || die
		popd >/dev/null || die
	fi

	# Remove most bundled libraries. Some are still needed.
	build/linux/unbundle/remove_bundled_libraries.py "${keeplibs[@]}" --do-remove || die

	if use js-type-check; then
		ln -s "${EPREFIX}"/usr/bin/java third_party/jdk/current/bin/java || die
	fi

	# bundled eu-strip is for amd64 only and we don't want to pre-stripped binaries
	mkdir -p buildtools/third_party/eu-strip/bin || die
	ln -s "${EPREFIX}"/bin/true buildtools/third_party/eu-strip/bin/eu-strip || die
}

chromium_rust_version_check() {
	[[ ${MERGE_TYPE} == binary ]] && return
	local rustc_version=( $(eselect --brief rust show 2>/dev/null) )
	rustc_version=${rustc_version[0]#rust-bin-}
	rustc_version=${rustc_version#rust-}

	[[ -z "${rustc_version}" ]] && die "Failed to determine rust version, check 'eselect rust' output"

	echo $rustc_version
}

chromium_configure() {
	# Calling this here supports resumption via FEATURES=keepwork
	python_setup

	local myconf_gn=""

	# Make sure the build system will use the right tools, bug #340795.
	tc-export AR CC CXX NM

	if needs_clang && ! tc-is-clang; then
		# Force clang since gcc is either broken or build is using libcxx.
		if tc-is-cross-compiler; then
			CC="${CBUILD}-clang -target ${CHOST} --sysroot ${ESYSROOT}"
			CXX="${CBUILD}-clang++ -target ${CHOST} --sysroot ${ESYSROOT}"
			BUILD_CC=${CBUILD}-clang
			BUILD_CXX=${CBUILD}-clang++
		else
			CC=${CHOST}-clang
			CXX=${CHOST}-clang++
		fi
		strip-unsupported-flags
	fi

	if tc-is-clang; then
		myconf_gn+=" is_clang=true clang_use_chrome_plugins=false"
	else
		myconf_gn+=" is_clang=false"
	fi

	# Force lld for lto or pgo builds only, otherwise disable, bug 641556
	if use lto || use pgo; then
		myconf_gn+=" use_lld=true"
	else
		myconf_gn+=" use_lld=false"
	fi

	if use lto || use pgo; then
		AR=llvm-ar
		NM=llvm-nm
		if tc-is-cross-compiler; then
			BUILD_AR=llvm-ar
			BUILD_NM=llvm-nm
		fi
	fi

	# Define a custom toolchain for GN
	myconf_gn+=" custom_toolchain=\"//build/toolchain/linux/unbundle:default\""

	if tc-is-cross-compiler; then
		tc-export BUILD_{AR,CC,CXX,NM}
		myconf_gn+=" host_toolchain=\"//build/toolchain/linux/unbundle:host\""
		myconf_gn+=" v8_snapshot_toolchain=\"//build/toolchain/linux/unbundle:host\""
		myconf_gn+=" pkg_config=\"$(tc-getPKG_CONFIG)\""
		myconf_gn+=" host_pkg_config=\"$(tc-getBUILD_PKG_CONFIG)\""

		# setup cups-config, build system only uses --libs option
		if use cups; then
			mkdir "${T}/cups-config" || die
			cp "${ESYSROOT}/usr/bin/${CHOST}-cups-config" "${T}/cups-config/cups-config" || die
			export PATH="${PATH}:${T}/cups-config"
		fi

		# Don't inherit PKG_CONFIG_PATH from environment
		local -x PKG_CONFIG_PATH=
	else
		myconf_gn+=" host_toolchain=\"//build/toolchain/linux/unbundle:default\""
	fi

	local rustc_ver
		rustc_ver=$(chromium_rust_version_check)
		if ver_test "${rustc_ver}" -lt "${RUST_MIN_VER}"; then
			eerror "Rust >=${RUST_MIN_VER} is required"
			eerror "Please run 'eselect rust' and select the correct rust version"
			die "Selected rust version is too old"
		else
			einfo "Using rust ${rustc_ver} to build"
		fi
		myconf_gn+=" rust_sysroot_absolute=\"${EPREFIX}/usr/lib/rust/${rustc_ver}/\""
		myconf_gn+=" rustc_version=\"${rustc_ver}\""

	# Create dummy pkg-config file for libsystemd, only dependency of installer
	mkdir "${T}/libsystemd" || die
	cat <<- EOF > "${T}/libsystemd/libsystemd.pc"
		Name:
		Description:
		Version:
	EOF
	local -x PKG_CONFIG_PATH="${PKG_CONFIG_PATH:+"${PKG_CONFIG_PATH}:"}${T}/libsystemd"

	# GN needs explicit config for Debug/Release as opposed to inferring it from build directory.
	myconf_gn+=" is_debug=false"

	# enable DCHECK with USE=debug only, increases chrome binary size by 30%, bug #811138.
	# DCHECK is fatal by default, make it configurable at runtime, #bug 807881.
	myconf_gn+=" dcheck_always_on=$(usex debug true false)"
	myconf_gn+=" dcheck_is_configurable=$(usex debug true false)"

	# Component build isn't generally intended for use by end users. It's mostly useful
	# for development and debugging.
	myconf_gn+=" is_component_build=$(usex component-build true false)"

	# Disable nacl, we can't build without pnacl (http://crbug.com/269560).
	myconf_gn+=" enable_nacl=false"

	# Use system-provided libraries.
	# TODO: freetype -- remove sources (https://bugs.chromium.org/p/pdfium/issues/detail?id=733).
	# TODO: use_system_hunspell (upstream changes needed).
	# TODO: use_system_protobuf (bug #525560).
	# TODO: use_system_sqlite (http://crbug.com/22208).

	# libevent: https://bugs.gentoo.org/593458
	local gn_system_libraries=(
		flac
		fontconfig
		freetype
		# Need harfbuzz_from_pkgconfig target
		#harfbuzz-ng
		libdrm
		libjpeg
		# libwebp
		libxml
		libxslt
		openh264
		zlib
	)
	if use system-ffmpeg; then
		gn_system_libraries+=( ffmpeg opus )
	fi
	if use system-icu; then
		gn_system_libraries+=( icu )
	fi
	if use system-png; then
		gn_system_libraries+=( libpng )
	fi
	if use system-av1; then
		gn_system_libraries+=( dav1d libaom )
	fi
	# re2 library interface relies on std::string and std::vector
	if false && ! use libcxx; then
		gn_system_libraries+=( re2 )
	fi
	build/linux/unbundle/replace_gn_files.py --system-libraries "${gn_system_libraries[@]}" || die

	# See dependency logic in third_party/BUILD.gn
	myconf_gn+=" use_system_harfbuzz=$(usex system-harfbuzz true false)"

	# Disable deprecated libgnome-keyring dependency, bug #713012
	myconf_gn+=" use_gnome_keyring=false"

	# Optional dependencies.
	myconf_gn+=" enable_js_type_check=$(usex js-type-check true false)"
	myconf_gn+=" enable_hangout_services_extension=$(usex hangouts true false)"
	myconf_gn+=" enable_widevine=$(usex widevine true false)"

	if use headless; then
		myconf_gn+=" use_cups=false"
		myconf_gn+=" use_kerberos=false"
		myconf_gn+=" use_pulseaudio=false"
		myconf_gn+=" use_vaapi=false"
		myconf_gn+=" rtc_use_pipewire=false"
	else
		myconf_gn+=" use_cups=$(usex cups true false)"
		myconf_gn+=" use_kerberos=$(usex kerberos true false)"
		myconf_gn+=" use_pulseaudio=$(usex pulseaudio true false)"
		myconf_gn+=" use_vaapi=$(usex vaapi true false)"
		myconf_gn+=" rtc_use_pipewire=$(usex screencast true false)"
		myconf_gn+=" gtk_version=$(usex gtk4 4 3)"
	fi

	# TODO: link_pulseaudio=true for GN.

	myconf_gn+=" disable_fieldtrial_testing_config=true"

	# Never use bundled gold binary. Disable gold linker flags for now.
	# Do not use bundled clang.
	# Trying to use gold results in linker crash.
	myconf_gn+=" use_gold=false use_sysroot=false"
	myconf_gn+=" use_custom_libcxx=$(usex libcxx true false)"

	# Disable pseudolocales, only used for testing
	myconf_gn+=" enable_pseudolocales=false"

	# Disable code formating of generated files
	myconf_gn+=" blink_enable_generated_code_formatting=false"

	ffmpeg_branding="$(usex proprietary-codecs Chrome Chromium)"
	myconf_gn+=" proprietary_codecs=$(usex proprietary-codecs true false)"
	myconf_gn+=" ffmpeg_branding=\"${ffmpeg_branding}\""

	# Set up Google API keys, see http://www.chromium.org/developers/how-tos/api-keys .
	# Note: these are for Gentoo use ONLY. For your own distribution,
	# please get your own set of keys. Feel free to contact chromium@gentoo.org
	# for more info. The OAuth2 credentials, however, have been left out.
	# Those OAuth2 credentials have been broken for quite some time anyway.
	# Instead we apply a patch to use the --oauth2-client-id= and
	# --oauth2-client-secret= switches for setting GOOGLE_DEFAULT_CLIENT_ID and
	# GOOGLE_DEFAULT_CLIENT_SECRET at runtime. This allows signing into
	# Chromium without baked-in values.
	local google_api_key="AIzaSyDEAOvatFo0eTgsV_ZlEzx0ObmepsMzfAc"
	myconf_gn+=" google_api_key=\"${google_api_key}\""
	local myarch="$(tc-arch)"

	# Avoid CFLAGS problems, bug #352457, bug #390147.
	if ! use custom-cflags; then
		replace-flags "-Os" "-O2"
		strip-flags

		# Debug info section overflows without component build
		# Prevent linker from running out of address space, bug #471810 .
		if ! use component-build || use x86; then
			filter-flags "-g*"
		fi

		# Prevent libvpx/xnnpack build failures. Bug 530248, 544702, 546984, 853646.
		if [[ ${myarch} == amd64 || ${myarch} == x86 ]]; then
			filter-flags -mno-mmx -mno-sse2 -mno-ssse3 -mno-sse4.1 -mno-avx -mno-avx2 -mno-fma -mno-fma4 -mno-xop -mno-sse4a
		fi
	fi

	if [[ $myarch = amd64 ]] ; then
		myconf_gn+=" target_cpu=\"x64\""
		ffmpeg_target_arch=x64
	elif [[ $myarch = x86 ]] ; then
		myconf_gn+=" target_cpu=\"x86\""
		ffmpeg_target_arch=ia32

		# This is normally defined by compiler_cpu_abi in
		# build/config/compiler/BUILD.gn, but we patch that part out.
		append-flags -msse2 -mfpmath=sse -mmmx
	elif [[ $myarch = arm64 ]] ; then
		myconf_gn+=" target_cpu=\"arm64\""
		ffmpeg_target_arch=arm64
	elif [[ $myarch = arm ]] ; then
		myconf_gn+=" target_cpu=\"arm\""
		ffmpeg_target_arch=$(usex cpu_flags_arm_neon arm-neon arm)
	elif [[ $myarch = ppc64 ]] ; then
		myconf_gn+=" target_cpu=\"ppc64\""
		ffmpeg_target_arch=ppc64
	else
		die "Failed to determine target arch, got '$myarch'."
	fi

	# Make sure that -Werror doesn't get added to CFLAGS by the build system.
	# Depending on GCC version the warnings are different and we don't want
	# the build to fail because of that.
	myconf_gn+=" treat_warnings_as_errors=false"

	# Disable fatal linker warnings, bug 506268.
	myconf_gn+=" fatal_linker_warnings=false"

	# Disable external code space for V8 for ppc64. It is disabled for ppc64
	# by default, but cross-compiling on amd64 enables it again.
	if tc-is-cross-compiler; then
		if ! use amd64 && ! use arm64; then
			myconf_gn+=" v8_enable_external_code_space=false"
		fi
	fi

	# Only enabled for clang, but gcc has endian macros too
	myconf_gn+=" v8_use_libm_trig_functions=true"

	# Bug 491582.
	export TMPDIR="${WORKDIR}/temp"
	mkdir -p -m 755 "${TMPDIR}" || die

	# https://bugs.gentoo.org/654216
	addpredict /dev/dri/ #nowarn

	#if ! use system-ffmpeg; then
	if false; then
		local build_ffmpeg_args=""
		if use pic && [[ "${ffmpeg_target_arch}" == "ia32" ]]; then
			build_ffmpeg_args+=" --disable-asm"
		fi

		# Re-configure bundled ffmpeg. See bug #491378 for example reasons.
		einfo "Configuring bundled ffmpeg..."
		pushd third_party/ffmpeg > /dev/null || die
		chromium/scripts/build_ffmpeg.py linux ${ffmpeg_target_arch} \
			--branding ${ffmpeg_branding} -- ${build_ffmpeg_args} || die
		chromium/scripts/copy_config.sh || die
		chromium/scripts/generate_gn.py || die
		popd > /dev/null || die
	fi

	# Disable unknown warning message from clang.
	if tc-is-clang; then
		append-flags -Wno-unknown-warning-option
		if tc-is-cross-compiler; then
			export BUILD_CXXFLAGS+=" -Wno-unknown-warning-option"
			export BUILD_CFLAGS+=" -Wno-unknown-warning-option"
		fi
	fi

	# Explicitly disable ICU data file support for system-icu/headless builds.
	if use system-icu || use headless; then
		myconf_gn+=" icu_use_data_file=false"
	fi

	# Enable ozone wayland and/or headless support
	myconf_gn+=" use_ozone=true ozone_auto_platforms=false"
	myconf_gn+=" ozone_platform_headless=true"
	myconf_gn+=" enable_remoting=false"
	if use headless; then
		myconf_gn+=" ozone_platform=\"headless\""
		myconf_gn+=" use_xkbcommon=false use_gtk=false use_qt=false"
		myconf_gn+=" use_glib=false use_gio=false"
		myconf_gn+=" use_pangocairo=false use_alsa=false"
		myconf_gn+=" use_libpci=false use_udev=false"
		myconf_gn+=" enable_print_preview=false"
	else
		myconf_gn+=" use_system_libdrm=true"
		myconf_gn+=" use_system_minigbm=true"
		myconf_gn+=" use_xkbcommon=true"
		if use qt5; then
			local moc_dir="$(qt5_get_bindir)"
			if tc-is-cross-compiler; then
				# Hack to workaround get_libdir not being able to handle CBUILD, bug #794181
				local cbuild_libdir=$($(tc-getBUILD_PKG_CONFIG) --keep-system-libs --libs-only-L libxslt)
				cbuild_libdir=${cbuild_libdir:2}
				moc_dir="${EPREFIX}"/${cbuild_libdir/% }/qt5/bin
			fi
			export PATH="${PATH}:${moc_dir}"
		fi
		myconf_gn+=" use_qt=$(usex qt5 true false)"
		myconf_gn+=" ozone_platform_x11=$(usex X true false)"
		myconf_gn+=" ozone_platform_wayland=$(usex wayland true false)"
		myconf_gn+=" ozone_platform=$(usex wayland \"wayland\" \"x11\")"
		use wayland && myconf_gn+=" use_system_libffi=true"
	fi

	# Results in undefined references in chrome linking, may require CFI to work
	if use arm64; then
		myconf_gn+=" arm_control_flow_integrity=\"none\""
	fi

	# Enable official builds
	myconf_gn+=" is_official_build=$(usex official true false)"
	myconf_gn+=" use_thin_lto=$(usex lto true false)"
	myconf_gn+=" thin_lto_enable_optimizations=$(usex lto true false)"
	if use official; then
		# Allow building against system libraries in official builds
		sed -i 's/OFFICIAL_BUILD/GOOGLE_CHROME_BUILD/' \
			tools/generate_shim_headers/generate_shim_headers.py || die
		# Disable CFI: unsupported for GCC, requires clang+lto+lld
		myconf_gn+=" is_cfi=false"
		# Don't add symbols to build
		myconf_gn+=" symbol_level=0"
	fi

	if use pgo; then
		myconf_gn+=" chrome_pgo_phase=${1}"
		if [[ "$1" == "2" ]]; then
			myconf_gn+=" pgo_data_path=\"${2}\""
		fi
	else
		# Disable PGO, because profile data is only compatible with >=clang-11
		myconf_gn+=" chrome_pgo_phase=0"
	fi

	# user CXXFLAGS might overwrite -march=armv8-a+crc+crypto, bug #851639
	if use arm64 && tc-is-gcc; then
		sed -i '/^#if HAVE_ARM64_CRC32C/a #pragma GCC target ("+crc+crypto")' \
			third_party/crc32c/src/src/crc32c_arm64.cc || die
	fi

	# skipping typecheck is only supported on amd64, bug #876157
	if ! use amd64; then
		myconf_gn+=" devtools_skip_typecheck=false"
	fi

	# broken in 119
	myconf_gn+=" enable_nocompile_tests=false"

	einfo "Configuring Chromium..."
	set -- gn gen --args="${myconf_gn} ${EXTRA_GN}" out/Release
	echo "$@"
	"$@" || die
}

src_configure() {
	chromium_configure $(usex pgo 1 0)
}

chromium_compile() {
	# Final link uses lots of file descriptors.
	ulimit -n 2048

	# Calling this here supports resumption via FEATURES=keepwork
	python_setup

	# Don't inherit PYTHONPATH from environment, bug #789021, #812689
	local -x PYTHONPATH=

	# Build mksnapshot and pax-mark it.
	local x
	for x in mksnapshot v8_context_snapshot_generator; do
		if tc-is-cross-compiler; then
			eninja -C out/Release "host/${x}"
			pax-mark m "out/Release/host/${x}"
		else
			eninja -C out/Release "${x}"
			pax-mark m "out/Release/${x}"
		fi
	done

	# Even though ninja autodetects number of CPUs, we respect
	# user's options, for debugging with -j 1 or any other reason.
	eninja -C out/Release chrome chromedriver
	use suid && eninja -C out/Release chrome_sandbox

	pax-mark m out/Release/chrome
}

# This function is called from virtx, and must always return so that Xvfb
# session isn't left running. If we return 1, virtx will call die().
chromium_profile() {
	einfo "Profiling for PGO"

	pushd "${WORKDIR}/chromium-profiler-"* >/dev/null || return 1

	# Remove old profdata in case profiling was interrupted.
	rm -rf "${1}" || return 1

	if ! "${EPYTHON}" ./chromium_profiler.py \
		--chrome-executable "${S}/out/Release/chrome" \
		--chromedriver-executable "${S}/out/Release/chromedriver.unstripped" \
		--add-arg no-sandbox --add-arg disable-dev-shm-usage \
		--profile-output "${1}"; then
		eerror "Profiling failed"
		return 1
	fi

	popd >/dev/null || return 1
}

src_compile() {
	if use pgo; then
		local profdata

		profdata="${WORKDIR}/chromium.profdata"

		if [[ ! -e "${WORKDIR}/.pgo-profiled" ]]; then
			chromium_compile
			virtx chromium_profile "$profdata"

			touch "${WORKDIR}/.pgo-profiled" || die
		fi

		if [[ ! -e "${WORKDIR}/.pgo-phase-2-configured" ]]; then
			# Remove phase 1 output
			rm -r out/Release || die

			chromium_configure 2 "$profdata"

			touch "${WORKDIR}/.pgo-phase-2-configured" || die
		fi

		if [[ ! -e "${WORKDIR}/.pgo-phase-2-compiled" ]]; then
			chromium_compile
			touch "${WORKDIR}/.pgo-phase-2-compiled" || die
		fi
	else
		chromium_compile
	fi

	mv out/Release/chromedriver{.unstripped,} || die

	rm -f out/Release/locales/*.pak.info || die

	# Build manpage; bug #684550
	sed -e 's|@@PACKAGE@@|chromium-browser|g;
		s|@@MENUNAME@@|Chromium|g;' \
		chrome/app/resources/manpage.1.in > \
		out/Release/chromium-browser.1 || die

	# Build desktop file; bug #706786
	sed -e 's|@@MENUNAME@@|Chromium|g;
		s|@@USR_BIN_SYMLINK_NAME@@|chromium-browser|g;
		s|@@PACKAGE@@|chromium-browser|g;
		s|\(^Exec=\)/usr/bin/|\1|g;' \
		chrome/installer/linux/common/desktop.template > \
		out/Release/chromium-browser-chromium.desktop || die

	# Build vk_swiftshader_icd.json; bug #827861
	sed -e 's|${ICD_LIBRARY_PATH}|./libvk_swiftshader.so|g' \
		third_party/swiftshader/src/Vulkan/vk_swiftshader_icd.json.tmpl > \
		out/Release/vk_swiftshader_icd.json || die
}

src_install() {
	local CHROMIUM_HOME="/usr/$(get_libdir)/chromium-browser"
	exeinto "${CHROMIUM_HOME}"
	doexe out/Release/chrome

	if use suid; then
		newexe out/Release/chrome_sandbox chrome-sandbox
		fperms 4755 "${CHROMIUM_HOME}/chrome-sandbox"
	fi

	doexe out/Release/chromedriver
	doexe out/Release/chrome_crashpad_handler

	ozone_auto_session () {
		use X && use wayland && ! use headless && echo true || echo false
	}
	local sedargs=( -e
			"s:/usr/lib/:/usr/$(get_libdir)/:g;
			s:@@OZONE_AUTO_SESSION@@:$(ozone_auto_session):g"
	)
	sed "${sedargs[@]}" "${FILESDIR}/chromium-launcher-r7.sh" > chromium-launcher.sh || die
	doexe chromium-launcher.sh

	# It is important that we name the target "chromium-browser",
	# xdg-utils expect it; bug #355517.
	dosym "${CHROMIUM_HOME}/chromium-launcher.sh" /usr/bin/chromium-browser
	# keep the old symlink around for consistency
	dosym "${CHROMIUM_HOME}/chromium-launcher.sh" /usr/bin/chromium

	dosym "${CHROMIUM_HOME}/chromedriver" /usr/bin/chromedriver

	# Allow users to override command-line options, bug #357629.
	insinto /etc/chromium
	newins "${FILESDIR}/chromium.default" "default"

	pushd out/Release/locales > /dev/null || die
	chromium_remove_language_paks
	popd

	insinto "${CHROMIUM_HOME}"
	doins out/Release/*.bin
	doins out/Release/*.pak
	(
		shopt -s nullglob
		local files=(out/Release/*.so out/Release/*.so.[0-9])
		[[ ${#files[@]} -gt 0 ]] && doins "${files[@]}"
	)

	# Install bundled xdg-utils, avoids installing X11 libraries with USE="-X wayland"
	doins out/Release/xdg-{settings,mime}

	if ! use system-icu && ! use headless; then
		doins out/Release/icudtl.dat
	fi

	doins -r out/Release/locales
	doins -r out/Release/MEIPreload

	# Install vk_swiftshader_icd.json; bug #827861
	doins out/Release/vk_swiftshader_icd.json

	if [[ -d out/Release/swiftshader ]]; then
		insinto "${CHROMIUM_HOME}/swiftshader"
		doins out/Release/swiftshader/*.so
	fi

	# Install icons
	local branding size
	for size in 16 24 32 48 64 128 256 ; do
		case ${size} in
			16|32) branding="chrome/app/theme/default_100_percent/chromium" ;;
				*) branding="chrome/app/theme/chromium" ;;
		esac
		newicon -s ${size} "${branding}/product_logo_${size}.png" \
			chromium-browser.png
	done

	# Install desktop entry
	domenu out/Release/chromium-browser-chromium.desktop

	# Install GNOME default application entry (bug #303100).
	insinto /usr/share/gnome-control-center/default-apps
	newins "${FILESDIR}"/chromium-browser.xml chromium-browser.xml

	# Install manpage; bug #684550
	doman out/Release/chromium-browser.1
	dosym chromium-browser.1 /usr/share/man/man1/chromium.1

	readme.gentoo_create_doc
}

pkg_postrm() {
	xdg_icon_cache_update
	xdg_desktop_database_update
}

pkg_postinst() {
	xdg_icon_cache_update
	xdg_desktop_database_update
	readme.gentoo_print_elog

	if ! use headless; then
		if use vaapi; then
			elog "VA-API is disabled by default at runtime. You have to enable it"
			elog "by adding --enable-features=VaapiVideoDecoder to CHROMIUM_FLAGS"
			elog "in /etc/chromium/default."
		fi
		if use screencast; then
			elog "Screencast is disabled by default at runtime. Either enable it"
			elog "by navigating to chrome://flags/#enable-webrtc-pipewire-capturer"
			elog "inside Chromium or add --enable-features=WebRTCPipeWireCapturer"
			elog "to CHROMIUM_FLAGS in /etc/chromium/default."
		fi
		if use gtk4; then
			elog "Chromium prefers GTK3 over GTK4 at runtime. To override this"
			elog "behavior you need to pass --gtk-version=4, e.g. by adding it"
			elog "to CHROMIUM_FLAGS in /etc/chromium/default."
		fi
	fi
}