Here's a quick GTK 4 test ebuild as gui-libs/gtk

gtk-3.99.4.ebuild (text/plain), 5.05 KB, created by David Michael on 2020-11-14 20:29:18 UTC

# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit gnome.org gnome2-utils meson multilib-minimal virtualx xdg

DESCRIPTION="Gimp ToolKit +"
HOMEPAGE="https://www.gtk.org/"

LICENSE="LGPL-2+"
SLOT="3"
IUSE="aqua broadway cloudprint colord cups examples ffmpeg gstreamer gtk-doc +introspection sysprof test vulkan wayland +X xinerama"
REQUIRED_USE="
	|| ( aqua wayland X )
	xinerama? ( X )
"

KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"

# Upstream wants us to do their job:
# https://bugzilla.gnome.org/show_bug.cgi?id=768662#c1
RESTRICT="test"

# FIXME: introspection data is built against system installation of gtk+:3,
# bug #????
COMMON_DEPEND="
	>=dev-libs/atk-2.15.1[introspection?,${MULTILIB_USEDEP}]
	>=dev-libs/fribidi-0.19.7[${MULTILIB_USEDEP}]
	>=dev-libs/glib-2.65.0:2[${MULTILIB_USEDEP}]
	media-libs/fontconfig[${MULTILIB_USEDEP}]
	>=media-libs/graphene-1.9.1[${MULTILIB_USEDEP}]
	>=media-libs/libepoxy-1.4[X(+)?,${MULTILIB_USEDEP}]
	>=x11-libs/cairo-1.14[aqua?,glib,svg,X?,${MULTILIB_USEDEP}]
	>=x11-libs/gdk-pixbuf-2.30:2[introspection?,${MULTILIB_USEDEP}]
	>=x11-libs/pango-1.47.0[introspection?,${MULTILIB_USEDEP}]
	>=media-libs/harfbuzz-0.9:=
	x11-misc/shared-mime-info

	cloudprint? (
		>=net-libs/rest-0.7[${MULTILIB_USEDEP}]
		>=dev-libs/json-glib-1.0[${MULTILIB_USEDEP}]
	)
	colord? ( >=x11-misc/colord-0.1.9:0=[${MULTILIB_USEDEP}] )
	cups? ( >=net-print/cups-2.0[${MULTILIB_USEDEP}] )
	ffmpeg? ( media-video/ffmpeg[${MULTILIB_USEDEP}] )
	gstreamer? ( >=media-libs/gst-plugins-bad-1.12.3[${MULTILIB_USEDEP}] )
	introspection? ( >=dev-libs/gobject-introspection-1.39:= )
	vulkan? ( media-libs/vulkan-loader:=[${MULTILIB_USEDEP}] )
	wayland? (
		>=dev-libs/wayland-1.14.91[${MULTILIB_USEDEP}]
		>=dev-libs/wayland-protocols-1.20
		media-libs/mesa[wayland,${MULTILIB_USEDEP}]
		>=x11-libs/libxkbcommon-0.2[${MULTILIB_USEDEP}]
	)
	X? (
		>=app-accessibility/at-spi2-atk-2.5.3[${MULTILIB_USEDEP}]
		media-libs/mesa[X(+),${MULTILIB_USEDEP}]
		x11-libs/libX11[${MULTILIB_USEDEP}]
		>=x11-libs/libXi-1.3[${MULTILIB_USEDEP}]
		x11-libs/libXext[${MULTILIB_USEDEP}]
		>=x11-libs/libXrandr-1.5[${MULTILIB_USEDEP}]
		x11-libs/libXcursor[${MULTILIB_USEDEP}]
		x11-libs/libXfixes[${MULTILIB_USEDEP}]
		x11-libs/libXcomposite[${MULTILIB_USEDEP}]
		x11-libs/libXdamage[${MULTILIB_USEDEP}]
		xinerama? ( x11-libs/libXinerama[${MULTILIB_USEDEP}] )
	)
"
DEPEND="${COMMON_DEPEND}
	>=sys-devel/gettext-0.19.7[${MULTILIB_USEDEP}]
	sysprof? ( >=dev-util/sysprof-capture-3.38:4[${MULTILIB_USEDEP}] )
	test? (
		media-fonts/font-misc-misc
		media-fonts/font-cursor-misc
	)
	X? ( x11-base/xorg-proto )
"
# gtk+-3.2.2 breaks Alt key handling in <=x11-libs/vte-0.30.1:2.90
# gtk+-3.3.18 breaks scrolling in <=x11-libs/vte-0.31.0:2.90
RDEPEND="${COMMON_DEPEND}
	>=dev-util/gtk-update-icon-cache-3
	!<gnome-base/gail-1000
	!<x11-libs/vte-0.31.0:2.90
"
# librsvg for svg icons (PDEPEND to avoid circular dep), bug #547710
PDEPEND="
	gnome-base/librsvg[${MULTILIB_USEDEP}]
	>=x11-themes/adwaita-icon-theme-3.14
"
BDEPEND="
	app-text/docbook-xml-dtd:4.1.2
	app-text/docbook-xsl-stylesheets
	dev-lang/sassc
	dev-libs/gobject-introspection-common
	dev-libs/libxslt
	>=dev-util/gdbus-codegen-2.48
	dev-util/glib-utils
	>=dev-util/gtk-doc-am-1.20
	virtual/pkgconfig
	gtk-doc? (
		app-text/docbook-xml-dtd:4.3
		>=dev-util/gtk-doc-1.33
	)
"

multilib_src_configure() {
	local emesonargs=(
		# GDK backends
		$(meson_use aqua macos-backend)
		$(meson_use broadway broadway-backend)
		$(meson_use wayland wayland-backend)
		$(meson_use X x11-backend)
		-Dwin32-backend=false

		# Media backends
		$(meson_feature ffmpeg media-ffmpeg)
		$(meson_feature gstreamer media-gstreamer)

		# Print backends
		$(meson_feature cloudprint print-cloudprint)
		$(meson_feature cups print-cups)

		# Optional dependencies
		$(meson_feature colord)
		$(meson_feature sysprof)
		$(meson_feature vulkan)
		$(meson_feature xinerama)
		-Dcloudproviders=disabled  # cloudprovider is not packaged in Gentoo yet
		-Dtracker3=disabled  # tracker3 is not packaged in Gentoo yet

		# Documentation and introspection
		-Dgtk_doc=$(multilib_native_usex gtk-doc true false)
		-Dintrospection=$(multilib_native_usex introspection enabled disabled)
		-Dman-pages=true

		# Demos and binaries
		$(meson_use examples build-examples)
		$(meson_use examples demos)
		$(meson_use test build-tests)
		-Dinstall-tests=false
	)
	meson_src_configure
}

multilib_src_test() {
	"${EROOT}${GLIB_COMPILE_SCHEMAS}" --allow-any-name "${S}/gtk" || die
	GSETTINGS_SCHEMA_DIR="${S}/gtk" virtx meson_src_test
}

multilib_src_install() {
	meson_src_install
}

pkg_preinst() {
	gnome2_schemas_savelist
}

pkg_postinst() {
	gnome2_schemas_update

	if ! has_version "app-text/evince"; then
		elog "Please install app-text/evince for print preview functionality."
		elog "Alternatively, check \"gtk-print-preview-command\" documentation and"
		elog "add it to your settings.ini file."
	fi
}

pkg_postrm() {
	gnome2_schemas_update
}