accessibility is optional

dev-cpp/gtkmm/Manifest

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+DIST gtkmm-3.24.10.tar.xz 13644320 BLAKE2B fa1d02c9def2f28bd1eb2b61aee9cba477adfd6f7537010a5e23bf11f805fe86b33c5e68c4f9b069397246a320c1b67337ac3943f5e5515e1c3933aa49279648 SHA512 d7478b66b94924e1457b1a6b4a46ee8027361ae1db0b3e203019957e4e591220de3a12c11d34cc5d381e707435c0cfe5eae12d620cd8db0e56a0485c39bd7abb

dev-cpp/gtkmm/gtkmm-3.24.10.ebuild

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+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+PYTHON_COMPAT=( python3_{11..14} )
+inherit gnome.org meson-multilib python-any-r1 virtualx
+
+DESCRIPTION="C++ interface for GTK+"
+HOMEPAGE="https://gtkmm.gnome.org/en/index.html"
+
+LICENSE="LGPL-2.1+"
+SLOT="3.0"
+KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv ~sparc x86"
+
+IUSE="+atk aqua gtk-doc test wayland X"
+REQUIRED_USE="|| ( aqua wayland X )"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	atk? ( >=dev-cpp/atkmm-2.24.2:0[gtk-doc?,${MULTILIB_USEDEP}] )
+	>=dev-cpp/cairomm-1.12.0:0[gtk-doc?,${MULTILIB_USEDEP}]
+	>=dev-cpp/glibmm-2.54.0:2[gtk-doc?,${MULTILIB_USEDEP}]
+	>=dev-cpp/pangomm-2.38.2:1.4[gtk-doc?,${MULTILIB_USEDEP}]
+	>=dev-libs/libsigc++-2.3.2:2[gtk-doc?,${MULTILIB_USEDEP}]
+	>=media-libs/libepoxy-1.2[${MULTILIB_USEDEP}]
+	>=x11-libs/gdk-pixbuf-2.35.5:2[${MULTILIB_USEDEP}]
+	>=x11-libs/gtk+-3.24.0:3[aqua?,wayland?,X=,${MULTILIB_USEDEP}]
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	virtual/pkgconfig
+	gtk-doc? (
+		app-text/doxygen[dot]
+		dev-lang/perl
+		dev-libs/libxslt
+	)
+	${PYTHON_DEPS}
+"
+
+multilib_src_configure() {
+	local emesonargs=(
+		$(meson_native_use_bool atk build-atkmm-api)
+		-Dbuild-demos=false
+		$(meson_native_use_bool gtk-doc build-documentation)
+		$(meson_use test build-tests)
+		$(meson_use X build-x11-api)
+	)
+	meson_src_configure
+}
+
+multilib_src_test() {
+	virtx meson_src_test
+}

dev-cpp/gtkmm/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="project">
+    <email>gnome@gentoo.org</email>
+    <name>Gentoo GNOME Desktop</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="gnome-gitlab">GNOME/gtkmm</remote-id>
+  </upstream>
+</pkgmetadata>