src_prepare-overlay/www-client/icecat/icecat-78.11.0.ebuild

# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# Ebuild is based on the Firefox ebuilds in the main repo

EAPI="7"

# Using Gentoos firefox patches as system libraries and lto are quite nice
FIREFOX_PATCHSET="firefox-78esr-patches-14.tar.xz"

LLVM_MAX_SLOT=11

PYTHON_COMPAT=( python3_{7..9} )
PYTHON_REQ_USE="ncurses,sqlite,ssl"

WANT_AUTOCONF="2.1"

VIRTUALX_REQUIRED="pgo"

inherit autotools check-reqs desktop flag-o-matic gnome2-utils llvm \
	multiprocessing pax-utils python-any-r1 toolchain-funcs \
	virtualx xdg

PATCH_URIS=(
	https://dev.gentoo.org/~{axs,polynomial-c,whissi}/mozilla/patchsets/${FIREFOX_PATCHSET}
)

SRC_URI="
	!buildtarball? ( icecat-${PV}-gnu1.tar.bz2 )
	${PATCH_URIS[@]}
"

DESCRIPTION="GNU IceCat Web Browser"
HOMEPAGE="https://www.gnu.org/software/gnuzilla/"

KEYWORDS="~amd64"

SLOT="0"
LICENSE="MPL-2.0 GPL-2 LGPL-2.1"
IUSE="+clang cpu_flags_arm_neon dbus debug +buildtarball geckodriver
	hardened hwaccel jack lto +openh264 pgo pulseaudio screencast selinux
	+system-av1 +system-harfbuzz +system-icu +system-jpeg +system-libevent
	+system-libvpx +system-webp wayland wifi"

REQUIRED_USE="debug? ( !system-av1 )
	screencast? ( wayland )
	wifi? ( dbus )"

BDEPEND="${PYTHON_DEPS}
	app-arch/unzip
	app-arch/zip
	>=dev-util/cbindgen-0.14.3
	>=net-libs/nodejs-10.21.0
	virtual/pkgconfig
	>=virtual/rust-1.41.0
	|| (
		(
			sys-devel/clang:12
			sys-devel/llvm:12
			clang? (
				=sys-devel/lld-12*
				pgo? ( =sys-libs/compiler-rt-sanitizers-12*[profile] )
			)
		)
		(
			sys-devel/clang:11
			sys-devel/llvm:11
			clang? (
				=sys-devel/lld-11*
				pgo? ( =sys-libs/compiler-rt-sanitizers-11*[profile] )
			)
		)
		(
			sys-devel/clang:10
			sys-devel/llvm:10
			clang? (
				=sys-devel/lld-10*
				pgo? ( =sys-libs/compiler-rt-sanitizers-10*[profile] )
			)
		)
	)
	lto? (
		!clang? ( sys-devel/binutils[gold] )
	)
	amd64? ( >=dev-lang/yasm-1.1 )
	x86? ( >=dev-lang/yasm-1.1 )
	!system-av1? (
		amd64? ( >=dev-lang/nasm-2.13 )
		x86? ( >=dev-lang/nasm-2.13 )
	)
	buildtarball? ( ~www-client/makeicecat-"${PV}"[buildtarball] )"

CDEPEND="
	>=dev-libs/nss-3.53.1
	>=dev-libs/nspr-4.25
	dev-libs/atk
	dev-libs/expat
	>=x11-libs/cairo-1.10[X]
	>=x11-libs/gtk+-2.18:2
	>=x11-libs/gtk+-3.4.0:3[X]
	x11-libs/gdk-pixbuf
	>=x11-libs/pango-1.22.0
	>=media-libs/libpng-1.6.35:0=[apng]
	>=media-libs/mesa-10.2:*
	media-libs/fontconfig
	>=media-libs/freetype-2.4.10
	kernel_linux? ( !pulseaudio? ( media-libs/alsa-lib ) )
	virtual/freedesktop-icon-theme
	>=x11-libs/pixman-0.19.2
	>=dev-libs/glib-2.26:2
	>=sys-libs/zlib-1.2.3
	>=dev-libs/libffi-3.0.10:=
	media-video/ffmpeg
	x11-libs/libX11
	x11-libs/libXcomposite
	x11-libs/libXdamage
	x11-libs/libXext
	x11-libs/libXfixes
	x11-libs/libXrender
	x11-libs/libXt
	dbus? (
		sys-apps/dbus
		dev-libs/dbus-glib
	)
	screencast? ( media-video/pipewire:0/0.3 )
	system-av1? (
		>=media-libs/dav1d-0.3.0:=
		>=media-libs/libaom-1.0.0:=
	)
	system-harfbuzz? (
		>=media-libs/harfbuzz-2.6.8:0=
		>=media-gfx/graphite2-1.3.13
	)
	system-icu? ( >=dev-libs/icu-67.1:= )
	system-jpeg? ( >=media-libs/libjpeg-turbo-1.2.1 )
	system-libevent? ( >=dev-libs/libevent-2.0:0=[threads] )
	system-libvpx? ( >=media-libs/libvpx-1.8.2:0=[postproc] )
	system-webp? ( >=media-libs/libwebp-1.1.0:0= )
	wifi? (
		kernel_linux? (
			sys-apps/dbus
			dev-libs/dbus-glib
			net-misc/networkmanager
		)
	)
	jack? ( virtual/jack )
	selinux? ( sec-policy/selinux-mozilla )"

RDEPEND="${CDEPEND}
	jack? ( virtual/jack )
	openh264? ( media-libs/openh264:*[plugin] )
	pulseaudio? (
		|| (
			media-sound/pulseaudio
			>=media-sound/apulse-0.1.12-r4
		)
	)
	selinux? ( sec-policy/selinux-mozilla )"

DEPEND="${CDEPEND}
	pulseaudio? (
		|| (
			media-sound/pulseaudio
			>=media-sound/apulse-0.1.12-r4[sdk]
		)
	)
	wayland? ( >=x11-libs/gtk+-3.11:3[wayland] )
	amd64? ( virtual/opengl )
	x86? ( virtual/opengl )"

S="${WORKDIR}/${PN}-${PV%_*}"

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

	if use clang ; then
		if ! has_version -b "=sys-devel/lld-${LLVM_SLOT}*" ; then
			ewarn "=sys-devel/lld-${LLVM_SLOT}* is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
			return 1
		fi

		if use pgo ; then
			if ! has_version -b "=sys-libs/compiler-rt-sanitizers-${LLVM_SLOT}*" ; then
				ewarn "=sys-libs/compiler-rt-sanitizers-${LLVM_SLOT}* is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
				return 1
			fi
		fi
	fi

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

MOZ_LANGS=(
	ach af an ar ast az be bg bn br bs ca-valencia ca cak cs cy
	da de dsb el en-CA en-GB en-US eo es-AR es-CL es-ES es-MX et eu
	fa ff fi fr fy-NL ga-IE gd gl gn gu-IN he hi-IN hr hsb hu hy-AM
	ia id is it ja ka kab kk km kn ko lij lt lv mk mr ms my
	nb-NO ne-NP nl nn-NO oc pa-IN pl pt-BR pt-PT rm ro ru
	si sk sl son sq sr sv-SE ta te th tl tr trs uk ur uz vi
	xh zh-CN zh-TW
)

mozilla_set_globals() {
	# https://bugs.gentoo.org/587334
	local MOZ_TOO_REGIONALIZED_FOR_L10N=(
		fy-NL ga-IE gu-IN hi-IN hy-AM nb-NO ne-NP nn-NO pa-IN sv-SE
	)

	local lang xflag
	for lang in "${MOZ_LANGS[@]}" ; do
		# en and en_US are handled internally
		if [[ ${lang} == en ]] || [[ ${lang} == en-US ]] ; then
			continue
		fi

		# strip region subtag if $lang is in the list
		if has ${lang} "${MOZ_TOO_REGIONALIZED_FOR_L10N[@]}" ; then
			xflag=${lang%%-*}
		else
			xflag=${lang}
		fi

		IUSE+=" l10n_${xflag/[_@]/-}"
	done

}
mozilla_set_globals

moz_clear_vendor_checksums() {
	debug-print-function ${FUNCNAME} "$@"

	if [[ ${#} -ne 1 ]] ; then
		die "${FUNCNAME} requires exact one argument"
	fi

	einfo "Clearing cargo checksums for ${1} ..."

	sed -i \
		-e 's/\("files":{\)[^}]*/\1/' \
		"${S}"/third_party/rust/${1}/.cargo-checksum.json \
		|| die
}

moz_build_xpi() {
	debug-print-function ${FUNCNAME} "$@"

	local MOZ_TOO_REGIONALIZED_FOR_L10N=(
		fy-NL ga-IE gu-IN hi-IN hy-AM nb-NO ne-NP nn-NO pa-IN sv-SE
	)

	cd "${BUILD_DIR}"/browser/locales || die
	local lang xflag
	for lang in "${MOZ_LANGS[@]}"; do
		# en and en_US are handled internally
		if [[ ${lang} == en ]] || [[ ${lang} == en-US ]] ; then
			continue
		fi

		# strip region subtag if $lang is in the list
		if has ${lang} "${MOZ_TOO_REGIONALIZED_FOR_L10N[@]}" ; then
			xflag=${lang%%-*}
		else
			xflag=${lang}
		fi

		if use l10n_"${xflag}"; then
			emake langpack-"${lang}" LOCALE_MERGEDIR=.
		fi
	done
}

moz_install_xpi() {
	debug-print-function ${FUNCNAME} "$@"

	if [[ ${#} -lt 2 ]] ; then
		die "${FUNCNAME} requires at least two arguments"
	fi

	local DESTDIR=${1}
	shift

	insinto "${DESTDIR}"

	local emid xpi_file xpi_tmp_dir
	for xpi_file in "${@}" ; do
		emid=
		xpi_tmp_dir=$(mktemp -d --tmpdir="${T}")

		# Unpack XPI
		unzip -qq "${xpi_file}" -d "${xpi_tmp_dir}" || die

		# Determine extension ID
		if [[ -f "${xpi_tmp_dir}/install.rdf" ]] ; then
			emid=$(sed -n -e '/install-manifest/,$ { /em:id/!d; s/.*[\">]\([^\"<>]*\)[\"<].*/\1/; p; q }' "${xpi_tmp_dir}/install.rdf")
			[[ -z "${emid}" ]] && die "failed to determine extension id from install.rdf"
		elif [[ -f "${xpi_tmp_dir}/manifest.json" ]] ; then
			emid=$(sed -n -e 's/.*"id": "\([^"]*\)".*/\1/p' "${xpi_tmp_dir}/manifest.json")
			[[ -z "${emid}" ]] && die "failed to determine extension id from manifest.json"
		else
			die "failed to determine extension id"
		fi

		einfo "Installing ${emid}.xpi into ${ED}${DESTDIR} ..."
		newins "${xpi_file}" "${emid}.xpi"
	done
}

mozconfig_add_options_ac() {
	debug-print-function ${FUNCNAME} "$@"

	if [[ ${#} -lt 2 ]] ; then
		die "${FUNCNAME} requires at least two arguments"
	fi

	local reason=${1}
	shift

	local option
	for option in ${@} ; do
		echo "ac_add_options ${option} # ${reason}" >>${MOZCONFIG}
	done
}

mozconfig_add_options_mk() {
	debug-print-function ${FUNCNAME} "$@"

	if [[ ${#} -lt 2 ]] ; then
		die "${FUNCNAME} requires at least two arguments"
	fi

	local reason=${1}
	shift

	local option
	for option in ${@} ; do
		echo "mk_add_options ${option} # ${reason}" >>${MOZCONFIG}
	done
}

mozconfig_use_enable() {
	debug-print-function ${FUNCNAME} "$@"

	if [[ ${#} -lt 1 ]] ; then
		die "${FUNCNAME} requires at least one arguments"
	fi

	local flag=$(use_enable "${@}")
	mozconfig_add_options_ac "$(use ${1} && echo +${1} || echo -${1})" "${flag}"
}

mozconfig_use_with() {
	debug-print-function ${FUNCNAME} "$@"

	if [[ ${#} -lt 1 ]] ; then
		die "${FUNCNAME} requires at least one arguments"
	fi

	local flag=$(use_with "${@}")
	mozconfig_add_options_ac "$(use ${1} && echo +${1} || echo -${1})" "${flag}"
}

pkg_pretend() {
	if [[ ${MERGE_TYPE} != binary ]] ; then
		if use pgo ; then
			if ! has usersandbox $FEATURES ; then
				die "You must enable usersandbox as X server can not run as root!"
			fi
		fi

		# Ensure we have enough disk space to compile
		if use pgo || use lto || use debug ; then
			CHECKREQS_DISK_BUILD="13500M"
		else
			CHECKREQS_DISK_BUILD="6400M"
		fi

		check-reqs_pkg_pretend
	fi
}

pkg_nofetch() {
	if ! use buildtarball; then
		einfo "You have not enabled buildtarball use flag, therefore you will have to"
		einfo "build the tarball manually and place it in your distfiles directory."
		einfo "You may find the script for building the tarball here"
		einfo "https://git.savannah.gnu.org/cgit/gnuzilla.git/, but make sure it is the"
		einfo "right version."
		einfo "The output of the script should be icecat-"${PV}"-gnu1.tar.bz2"
	fi
}

pkg_setup() {
	if [[ ${MERGE_TYPE} != binary ]] ; then
		if use pgo ; then
			if ! has userpriv ${FEATURES} ; then
				eerror "Building ${PN} with USE=pgo and FEATURES=-userpriv is not supported!"
			fi
		fi

		# Ensure we have enough disk space to compile
		if use pgo || use lto || use debug ; then
			CHECKREQS_DISK_BUILD="13500M"
		else
			CHECKREQS_DISK_BUILD="6400M"
		fi

		check-reqs_pkg_setup

		llvm_pkg_setup

		if use clang && use lto ; then
			local version_lld=$(ld.lld --version 2>/dev/null | awk '{ print $2 }')
			[[ -n ${version_lld} ]] && version_lld=$(ver_cut 1 "${version_lld}")
			[[ -z ${version_lld} ]] && die "Failed to read ld.lld version!"

			# temp fix for https://bugs.gentoo.org/768543
			# we can assume that rust 1.{49,50}.0 always uses llvm 11
			local version_rust=$(rustc -Vv 2>/dev/null | grep -F -- 'release:' | awk '{ print $2 }')
			[[ -n ${version_rust} ]] && version_rust=$(ver_cut 1-2 "${version_rust}")
			[[ -z ${version_rust} ]] && die "Failed to read version from rustc!"

			if ver_test "${version_rust}" -ge "1.49" && ver_test "${version_rust}" -le "1.50" ; then
				local version_llvm_rust="11"
			else
				local version_llvm_rust=$(rustc -Vv 2>/dev/null | grep -F -- 'LLVM version:' | awk '{ print $3 }')
				[[ -n ${version_llvm_rust} ]] && version_llvm_rust=$(ver_cut 1 "${version_llvm_rust}")
				[[ -z ${version_llvm_rust} ]] && die "Failed to read used LLVM version from rustc!"
			fi

			if ver_test "${version_lld}" -ne "${version_llvm_rust}" ; then
				eerror "Rust is using LLVM version ${version_llvm_rust} but ld.lld version belongs to LLVM version ${version_lld}."
				eerror "You will be unable to link ${CATEGORY}/${PN}. To proceed you have the following options:"
				eerror "  - Manually switch rust version using 'eselect rust' to match used LLVM version"
				eerror "  - Switch to dev-lang/rust[system-llvm] which will guarantee matching version"
				eerror "  - Build ${CATEGORY}/${PN} without USE=lto"
				die "LLVM version used by Rust (${version_llvm_rust}) does not match with ld.lld version (${version_lld})!"
			fi
		fi

		python-any-r1_pkg_setup

		# Avoid PGO profiling problems due to enviroment leakage
		# These should *always* be cleaned up anyway
		unset \
			DBUS_SESSION_BUS_ADDRESS \
			DISPLAY \
			ORBIT_SOCKETDIR \
			SESSION_MANAGER \
			XAUTHORITY \
			XDG_CACHE_HOME \
			XDG_SESSION_COOKIE

		# Build system is using /proc/self/oom_score_adj, bug #604394
		addpredict /proc/self/oom_score_adj

		if ! mountpoint -q /dev/shm ; then
			# If /dev/shm is not available, configure is known to fail with
			# a traceback report referencing /usr/lib/pythonN.N/multiprocessing/synchronize.py
			ewarn "/dev/shm is not mounted -- expect build failures!"
		fi

		# Ensure we use C locale when building, bug #746215
		export LC_ALL=C
	fi
}

src_unpack() {
	if use buildtarball; then
		unpack /usr/src/makeicecat-"${PV}"/output/icecat-"${PV}"-gnu1.tar.bz2 || eerror "Tarball is missing, check that www-client/makeicecat has use flag buildtarball enabled."
	else
		unpack icecat-"${PV}"-gnu1.tar.bz2
	fi
	unpack "${FIREFOX_PATCHSET}"
}

src_prepare() {
	use lto && rm -v "${WORKDIR}"/firefox-patches/*-LTO-Only-enable-LTO-*.patch
	eapply "${WORKDIR}/firefox-patches"

	# Allow user to apply any additional patches without modifing ebuild
	eapply_user

	# Make LTO respect MAKEOPTS
	sed -i \
		-e "s/multiprocessing.cpu_count()/$(makeopts_jobs)/" \
		"${S}"/build/moz.configure/lto-pgo.configure \
		|| die "sed failed to set num_cores"

	# Make ICU respect MAKEOPTS
	sed -i \
		-e "s/multiprocessing.cpu_count()/$(makeopts_jobs)/" \
		"${S}"/intl/icu_sources_data.py \
		|| die "sed failed to set num_cores"

	# sed-in toolchain prefix
	sed -i \
		-e "s/objdump/${CHOST}-objdump/" \
		"${S}"/python/mozbuild/mozbuild/configure/check_debug_ranges.py \
		|| die "sed failed to set toolchain prefix"

	sed -i \
		-e 's/ccache_stats = None/return None/' \
		"${S}"/python/mozbuild/mozbuild/controller/building.py \
		|| die "sed failed to disable ccache stats call"

	einfo "Removing pre-built binaries ..."
	find "${S}"/third_party -type f \( -name '*.so' -o -name '*.o' \) -print -delete || die

	# Clearing checksums where we have applied patches
	moz_clear_vendor_checksums target-lexicon-0.9.0

	# Create build dir
	BUILD_DIR="${WORKDIR}/${PN}_build"
	mkdir -p "${BUILD_DIR}" || die

	xdg_src_prepare
}

src_configure() {
	# Show flags set at the beginning
	einfo "Current BINDGEN_CFLAGS:\t${BINDGEN_CFLAGS:-no value set}"
	einfo "Current CFLAGS:\t\t${CFLAGS:-no value set}"
	einfo "Current CXXFLAGS:\t\t${CXXFLAGS:-no value set}"
	einfo "Current LDFLAGS:\t\t${LDFLAGS:-no value set}"
	einfo "Current RUSTFLAGS:\t\t${RUSTFLAGS:-no value set}"

	local have_switched_compiler=
	if use clang && ! tc-is-clang ; then
		# Force clang
		einfo "Enforcing the use of clang due to USE=clang ..."
		have_switched_compiler=yes
		AR=llvm-ar
		CC=${CHOST}-clang
		CXX=${CHOST}-clang++
		NM=llvm-nm
		RANLIB=llvm-ranlib
	elif ! use clang && ! tc-is-gcc ; then
		# Force gcc
		have_switched_compiler=yes
		einfo "Enforcing the use of gcc due to USE=-clang ..."
		AR=gcc-ar
		CC=${CHOST}-gcc
		CXX=${CHOST}-g++
		NM=gcc-nm
		RANLIB=gcc-ranlib
	fi

	if [[ -n "${have_switched_compiler}" ]] ; then
		# Because we switched active compiler we have to ensure
		# that no unsupported flags are set
		strip-unsupported-flags
	fi

	# Ensure we use correct toolchain
	export HOST_CC="$(tc-getBUILD_CC)"
	export HOST_CXX="$(tc-getBUILD_CXX)"
	tc-export CC CXX LD AR NM OBJDUMP RANLIB PKG_CONFIG

	# Pass the correct toolchain paths through cbindgen
	if tc-is-cross-compiler ; then
		export BINDGEN_CFLAGS="${SYSROOT:+--sysroot=${ESYSROOT}} --target=${CHOST} ${BINDGEN_CFLAGS-}"
	fi

	# Set MOZILLA_FIVE_HOME
	export MOZILLA_FIVE_HOME="/usr/$(get_libdir)/${PN}"

	# python/mach/mach/mixin/process.py fails to detect SHELL
	export SHELL="${EPREFIX}/bin/bash"

	# Set MOZCONFIG
	export MOZCONFIG="${S}/.mozconfig"

	# Initialize MOZCONFIG
	mozconfig_add_options_ac '' --enable-application=browser

	# Set Gentoo defaults
	export MOZILLA_OFFICIAL=1

	mozconfig_add_options_ac 'Gentoo default' \
		--allow-addon-sideload \
		--disable-cargo-incremental \
		--disable-crashreporter \
		--disable-eme \
		--disable-install-strip \
		--disable-strip \
		--disable-updater \
		--enable-official-branding \
		--enable-release \
		--enable-system-ffi \
		--enable-system-pixman \
		--host="${CBUILD:-${CHOST}}" \
		--libdir="${EPREFIX}/usr/$(get_libdir)" \
		--prefix="${EPREFIX}/usr" \
		--target="${CHOST}" \
		--without-ccache \
		--with-intl-api \
		--with-l10n-base="${S}"/l10n \
		--with-libclang-path="$(llvm-config --libdir)" \
		--with-system-nspr \
		--with-system-nss \
		--with-system-png \
		--with-system-zlib \
		--with-toolchain-prefix="${CHOST}-" \
		--with-unsigned-addon-scopes=app,system \
		--x-includes="${SYSROOT}${EPREFIX}/usr/include" \
		--x-libraries="${SYSROOT}${EPREFIX}/usr/$(get_libdir)"

	if ! use x86 && [[ ${CHOST} != armv*h* ]] ; then
		mozconfig_add_options_ac '' --enable-rust-simd
	fi

	mozconfig_use_with system-av1
	mozconfig_use_with system-harfbuzz
	mozconfig_use_with system-harfbuzz system-graphite2
	mozconfig_use_with system-icu
	mozconfig_use_with system-jpeg
	mozconfig_use_with system-libevent system-libevent "${SYSROOT}${EPREFIX}/usr"
	mozconfig_use_with system-libvpx
	mozconfig_use_with system-webp

	mozconfig_use_enable dbus

	mozconfig_use_enable geckodriver

	if use hardened ; then
		mozconfig_add_options_ac "+hardened" --enable-hardening
		append-ldflags "-Wl,-z,relro -Wl,-z,now"
	fi

	mozconfig_use_enable jack

	mozconfig_use_enable pulseaudio
	# force the deprecated alsa sound code if pulseaudio is disabled
	if use kernel_linux && ! use pulseaudio ; then
		mozconfig_add_options_ac '-pulseaudio' --enable-alsa
	fi

	mozconfig_use_enable screencast pipewire

	mozconfig_use_enable wifi necko-wifi

	if use wayland ; then
		mozconfig_add_options_ac '+wayland' --enable-default-toolkit=cairo-gtk3-wayland
	else
		mozconfig_add_options_ac '' --enable-default-toolkit=cairo-gtk3
	fi

	if use lto ; then
		if use clang ; then
			# Upstream only supports lld when using clang
			mozconfig_add_options_ac "forcing ld=lld due to USE=clang and USE=lto" --enable-linker=lld

			mozconfig_add_options_ac '+lto' --enable-lto=cross
		else
			# Linking only works when using ld.gold when LTO is enabled
			mozconfig_add_options_ac "forcing ld=gold due to USE=lto" --enable-linker=gold

			# ThinLTO is currently broken, see bmo#1644409
			mozconfig_add_options_ac '+lto' --enable-lto=full
		fi

		if use pgo ; then
			mozconfig_add_options_ac '+pgo' MOZ_PGO=1

			if use clang ; then
				# Used in build/pgo/profileserver.py
				export LLVM_PROFDATA="llvm-profdata"
			fi
		fi
	else
		# Avoid auto-magic on linker
		if use clang ; then
			# This is upstream's default
			mozconfig_add_options_ac "forcing ld=lld due to USE=clang" --enable-linker=lld
		elif tc-ld-is-gold ; then
			mozconfig_add_options_ac "linker is set to gold" --enable-linker=gold
		else
			mozconfig_add_options_ac "linker is set to bfd" --enable-linker=bfd
		fi
	fi

	# LTO flag was handled via configure
	filter-flags '-flto*'

	mozconfig_use_enable debug
	if use debug ; then
		mozconfig_add_options_ac '+debug' --disable-optimize
	else
		if is-flag '-g*' ; then
			if use clang ; then
				mozconfig_add_options_ac 'from CFLAGS' --enable-debug-symbols=$(get-flag '-g*')
			else
				mozconfig_add_options_ac 'from CFLAGS' --enable-debug-symbols
			fi
		else
			mozconfig_add_options_ac 'Gentoo default' --disable-debug-symbols
		fi

		if is-flag '-O0' ; then
			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O0
		elif is-flag '-O4' ; then
			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O4
		elif is-flag '-O3' ; then
			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O3
		elif is-flag '-O1' ; then
			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-O1
		elif is-flag '-Os' ; then
			mozconfig_add_options_ac "from CFLAGS" --enable-optimize=-Os
		else
			mozconfig_add_options_ac "Gentoo default" --enable-optimize=-O2
		fi
	fi

	# Debug flag was handled via configure
	filter-flags '-g*'

	# Optimization flag was handled via configure
	filter-flags '-O*'

	# Modifications to better support ARM, bug #553364
	if use cpu_flags_arm_neon ; then
		mozconfig_add_options_ac '+cpu_flags_arm_neon' --with-fpu=neon

		if ! tc-is-clang ; then
			# thumb options aren't supported when using clang, bug 666966
			mozconfig_add_options_ac '+cpu_flags_arm_neon' \
				--with-thumb=yes \
				--with-thumb-interwork=no
		fi
	fi

	if [[ ${CHOST} == armv*h* ]] ; then
		mozconfig_add_options_ac 'CHOST=armv*h*' --with-float-abi=hard

		if ! use system-libvpx ; then
			sed -i \
				-e "s|softfp|hard|" \
				"${S}"/media/libvpx/moz.build \
				|| die
		fi
	fi

	if use clang ; then
		# https://bugzilla.mozilla.org/show_bug.cgi?id=1482204
		# https://bugzilla.mozilla.org/show_bug.cgi?id=1483822
		# toolkit/moz.configure Elfhack section: target.cpu in ('arm', 'x86', 'x86_64')
		local disable_elf_hack=
		if use amd64 ; then
			disable_elf_hack=yes
		elif use x86 ; then
			disable_elf_hack=yes
		elif use arm ; then
			disable_elf_hack=yes
		fi

		if [[ -n ${disable_elf_hack} ]] ; then
			mozconfig_add_options_ac 'elf-hack is broken when using Clang' --disable-elf-hack
		fi
	elif tc-is-gcc ; then
		if ver_test $(gcc-fullversion) -ge 10 ; then
			einfo "Forcing -fno-tree-loop-vectorize to workaround GCC bug, see bug 758446 ..."
			append-cxxflags -fno-tree-loop-vectorize
		fi
	fi

	# Additional ARCH support
	case "${ARCH}" in
		arm)
			# Reduce the memory requirements for linking
			if use clang ; then
				# Nothing to do
				:;
			elif tc-ld-is-gold || use lto ; then
				append-ldflags -Wl,--no-keep-memory
			else
				append-ldflags -Wl,--no-keep-memory -Wl,--reduce-memory-overheads
			fi
			;;
	esac

	if ! use elibc_glibc ; then
		mozconfig_add_options_ac '!elibc_glibc' --disable-jemalloc
	fi

	# Allow elfhack to work in combination with unstripped binaries
	# when they would normally be larger than 2GiB.
	append-ldflags "-Wl,--compress-debug-sections=zlib"

	# Make revdep-rebuild.sh happy; Also required for musl
	append-ldflags -Wl,-rpath="${MOZILLA_FIVE_HOME}",--enable-new-dtags

	# Pass $MAKEOPTS to build system
	export MOZ_MAKE_FLAGS="${MAKEOPTS}"

	# Use system's Python environment
	export MACH_USE_SYSTEM_PYTHON=1

	# Disable notification when build system has finished
	export MOZ_NOSPAM=1

	# Build system requires xargs but is unable to find it
	mozconfig_add_options_mk 'Gentoo default' "XARGS=${EPREFIX}/usr/bin/xargs"

	# Set build dir
	mozconfig_add_options_mk 'Gentoo default' "MOZ_OBJDIR=${BUILD_DIR}"

	# Show flags we will use
	einfo "Build BINDGEN_CFLAGS:\t${BINDGEN_CFLAGS:-no value set}"
	einfo "Build CFLAGS:\t\t${CFLAGS:-no value set}"
	einfo "Build CXXFLAGS:\t\t${CXXFLAGS:-no value set}"
	einfo "Build LDFLAGS:\t\t${LDFLAGS:-no value set}"
	einfo "Build RUSTFLAGS:\t\t${RUSTFLAGS:-no value set}"

	# Handle EXTRA_CONF and show summary
	local ac opt hash reason

	# Apply EXTRA_ECONF entries to $MOZCONFIG
	if [[ -n ${EXTRA_ECONF} ]] ; then
		IFS=\! read -a ac <<<${EXTRA_ECONF// --/\!}
		for opt in "${ac[@]}"; do
			mozconfig_add_options_ac "EXTRA_ECONF" --${opt#--}
		done
	fi

	echo
	echo "=========================================================="
	echo "Building ${PF} with the following configuration"
	grep ^ac_add_options "${MOZCONFIG}" | while read ac opt hash reason; do
		[[ -z ${hash} || ${hash} == \# ]] \
			|| die "error reading mozconfig: ${ac} ${opt} ${hash} ${reason}"
		printf "    %-30s  %s\n" "${opt}" "${reason:-mozilla.org default}"
	done
	echo "=========================================================="
	echo

	./mach configure || die
}

src_compile() {
	local virtx_cmd=

	if use pgo ; then
		virtx_cmd=virtx

		# Reset and cleanup environment variables used by GNOME/XDG
		gnome2_environment_reset

		addpredict /root
	fi

	local -x GDK_BACKEND=x11

	${virtx_cmd} ./mach build --verbose \
		|| die

	# Build language packs
	moz_build_xpi
}

src_install() {
	# xpcshell is getting called during install
	pax-mark m \
		"${BUILD_DIR}"/dist/bin/xpcshell \
		"${BUILD_DIR}"/dist/bin/${PN} \
		"${BUILD_DIR}"/dist/bin/plugin-container

	DESTDIR="${D}" ./mach install || die

	# Upstream cannot ship symlink but we can (bmo#658850)
	rm "${ED}${MOZILLA_FIVE_HOME}/${PN}-bin" || die
	dosym ${PN} ${MOZILLA_FIVE_HOME}/${PN}-bin

	# Don't install llvm-symbolizer from sys-devel/llvm package
	if [[ -f "${ED}${MOZILLA_FIVE_HOME}/llvm-symbolizer" ]] ; then
		rm -v "${ED}${MOZILLA_FIVE_HOME}/llvm-symbolizer" || die
	fi

	# Install policy (currently only used to disable application updates)
	insinto "${MOZILLA_FIVE_HOME}/distribution"
	newins "${FILESDIR}"/distribution.ini distribution.ini

	# Install system-wide preferences
	local PREFS_DIR="${MOZILLA_FIVE_HOME}/browser/defaults/preferences"
	insinto "${PREFS_DIR}"
	newins "${FILESDIR}"/gentoo-default-prefs.js all-gentoo.js

	local GENTOO_PREFS="${ED}${PREFS_DIR}/all-gentoo.js"

	# Set dictionary path to use system hunspell
	cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set spellchecker.dictionary_path pref"
	pref("spellchecker.dictionary_path",       "${EPREFIX}/usr/share/myspell");
	EOF

	# Set installDistroAddons to true so that language packs work
	cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set extensions.installDistroAddons pref"
	pref("extensions.installDistroAddons",     true);
	pref("extensions.langpacks.signatures.required",	false);
	EOF

	# Disable signatures for language packs so that unsigned just built language packs work
	cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to disable langpacks signatures"
	pref("extensions.langpacks.signatures.required",	false);
	EOF

	# Force hwaccel prefs if USE=hwaccel is enabled
	if use hwaccel ; then
		cat "${FILESDIR}"/gentoo-hwaccel-prefs.js \
		>>"${GENTOO_PREFS}" \
		|| die "failed to add prefs to force hardware-accelerated rendering to all-gentoo.js"
	fi

	# Force the graphite pref if USE=system-harfbuzz is enabled, since the pref cannot disable it
	if use system-harfbuzz ; then
		cat >>"${GENTOO_PREFS}" <<-EOF || die "failed to set gfx.font_rendering.graphite.enabled pref"
		sticky_pref("gfx.font_rendering.graphite.enabled", true);
		EOF
	fi

	# Install language packs
	local langpacks=( $(find "${BUILD_DIR}"/dist/linux-x86_64/xpi -type f -name '*.xpi') )
	if [[ -n "${langpacks}" ]] ; then
		moz_install_xpi "${MOZILLA_FIVE_HOME}/browser/extensions" "${langpacks[@]}"
	fi

	# Install geckodriver
	if use geckodriver ; then
		einfo "Installing geckodriver into ${ED}${MOZILLA_FIVE_HOME} ..."
		pax-mark m "${BUILD_DIR}"/dist/bin/geckodriver
		exeinto "${MOZILLA_FIVE_HOME}"
		doexe "${BUILD_DIR}"/dist/bin/geckodriver

		dosym ${MOZILLA_FIVE_HOME}/geckodriver /usr/bin/geckodriver
	fi

	# Install icons
	local icon_srcdir="${S}/browser/branding/official"
	local icon_symbolic_file="${FILESDIR}/icon/"${PN}"-symbolic.svg"

	insinto /usr/share/icons/hicolor/symbolic/apps
	newins "${icon_symbolic_file}" "${PN}"-symbolic.svg

	local icon size
	for icon in "${icon_srcdir}"/default*.png ; do
		size=${icon%.png}
		size=${size##*/default}

		if [[ ${size} -eq 48 ]] ; then
			newicon "${icon}" ${PN}.png
		fi

		newicon -s ${size} "${icon}" ${PN}.png
	done

	# Install menus
	local wrapper_wayland="${PN}-wayland.sh"
	local wrapper_x11="${PN}-x11.sh"
	local desktop_file="${FILESDIR}/icon/${PN}-r2.desktop"
	local display_protocols="auto X11"
	local icon="${PN}"
	local name="GNU IceCat"
	local use_wayland="false"

	if use wayland ; then
		display_protocols+=" Wayland"
		use_wayland="true"
	fi

	local app_name desktop_filename display_protocol exec_command
	for display_protocol in ${display_protocols} ; do
		app_name="${name} on ${display_protocol}"
		desktop_filename="${PN}-${display_protocol,,}.desktop"

		case ${display_protocol} in
			Wayland)
				exec_command="${PN}-wayland --name ${PN}-wayland"
				newbin "${FILESDIR}/${wrapper_wayland}" ${PN}-wayland
				;;
			X11)
				if ! use wayland ; then
					# Exit loop here because there's no choice so
					# we don't need wrapper/.desktop file for X11.
					continue
				fi

				exec_command="${PN}-x11 --name ${PN}-x11"
				newbin "${FILESDIR}/${wrapper_x11}" ${PN}-x11
				;;
			*)
				app_name="${name}"
				desktop_filename="${PN}.desktop"
				exec_command="${PN}"
				;;
		esac

		cp "${desktop_file}" "${WORKDIR}/${PN}.desktop-template" || die

		sed -i \
			-e "s:@NAME@:${app_name}:" \
			-e "s:@EXEC@:${exec_command}:" \
			-e "s:@ICON@:${icon}:" \
			"${WORKDIR}/${PN}.desktop-template" \
			|| die

		newmenu "${WORKDIR}/${PN}.desktop-template" "${desktop_filename}"

		rm "${WORKDIR}/${PN}.desktop-template" || die
	done

	# Install generic wrapper script
	[[ -f "${ED}/usr/bin/${PN}" ]] && rm "${ED}/usr/bin/${PN}"
	newbin "${FILESDIR}/${PN}.sh" ${PN}

	# Update wrapper
	local wrapper
	for wrapper in \
		"${ED}/usr/bin/${PN}" \
		"${ED}/usr/bin/${PN}-x11" \
		"${ED}/usr/bin/${PN}-wayland" \
	; do
		[[ ! -f "${wrapper}" ]] && continue

		sed -i \
			-e "s:@PREFIX@:${EPREFIX}/usr:" \
			-e "s:@MOZ_FIVE_HOME@:${MOZILLA_FIVE_HOME}:" \
			-e "s:@APULSELIB_DIR@:${apulselib}:" \
			-e "s:@DEFAULT_WAYLAND@:${use_wayland}:" \
			"${wrapper}" \
			|| die
	done
}

pkg_preinst() {
	xdg_pkg_preinst

	# If the apulse libs are available in MOZILLA_FIVE_HOME then apulse
	# does not need to be forced into the LD_LIBRARY_PATH
	if use pulseaudio && has_version ">=media-sound/apulse-0.1.12-r4" ; then
		einfo "APULSE found; Generating library symlinks for sound support ..."
		local lib
		pushd "${ED}${MOZILLA_FIVE_HOME}" &>/dev/null || die
		for lib in ../apulse/libpulse{.so{,.0},-simple.so{,.0}} ; do
			# A quickpkg rolled by hand will grab symlinks as part of the package,
			# so we need to avoid creating them if they already exist.
			if [[ ! -L ${lib##*/} ]] ; then
				ln -s "${lib}" ${lib##*/} || die
			fi
		done
		popd &>/dev/null || die
	fi
}

pkg_postinst() {
	xdg_pkg_postinst

	elog "Cloudflare browser checks are broken with GNU IceCats anti fingerprinting measures."
	elog "You can fix cloudflare browser checks by undoing them in about:config like below:"
	elog "   general.appversion.override: 78.0 (X11)"
	elog "   general.oscpu.override: Linux x86_64"
	elog "   general.platform.override: Linux x86_64"

	if use pulseaudio && has_version ">=media-sound/apulse-0.1.12-r4" ; then
		elog "Apulse was detected at merge time on this system and so it will always be"
		elog "used for sound.  If you wish to use pulseaudio instead please unmerge"
		elog "media-sound/apulse."
		elog
	fi
}