Added v9999 ebuild for godot engine. (Untested)

dev-games/godot/Manifest

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+EBUILD godot-9999.ebuild 2715 BLAKE2B 9fa568f1991748122d069e0996e3feeeaa31f99566900b2a1a7ec4d632a1b4cfa05658c9ad817fc94cdcf9302e86fc98e22bfa0dd19bed1ffeda3ab3433c0972 SHA512 191162a6f2b3357b00f04f16bf404bf5153f1a5c2db2aa81ccbe602a95179f3369a98cdee35d6dd310ac80be27e9427ae8711520560de0db94ed15673de709b1

dev-games/godot/godot-9999.ebuild

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+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit eutils scons-utils
+
+DESCRIPTION="A advanced, feature packed, multi-platform 2D and 3D game engine."
+HOMEPAGE="http://www.godotengine.org"
+
+if [[ ${PV} == 9999 ]]; then
+	inherit git-r3
+
+	EGIT_REPO_URI="https://github.com/godotengine/godot.git"
+	SRC_URI=""
+	KEYWORDS=""
+else
+	SRC_URI="https://github.com/godotengine/godot/archive/${PV}-stable.tar.gz -> ${P}.tar.gz"
+	RESTRICT="primaryuri"
+	KEYWORDS="~amd64 ~x86"
+	S="${WORKDIR}/${PN}-${PV}-stable"
+fi
+
+LICENSE="MIT"
+SLOT="0"
+IUSE="+freetype llvm +openssl +png pulseaudio theora udev +vorbis +xml"
+
+DEPEND="
+		>=app-arch/bzip2-1.0.6-r6
+		>=app-arch/lz4-0_p120
+		>=app-arch/xz-utils-5.0.8
+		>=dev-libs/json-c-0.11-r1
+		>=media-libs/alsa-lib-1.0.28
+		>=media-libs/flac-1.3.1-r1
+		>=media-libs/libogg-1.3.1
+		>=media-libs/libsndfile-1.0.25-r1
+		>=media-libs/mesa-10.2.8[gles2]
+		>=net-libs/libasyncns-0.8-r3
+		>=sys-apps/attr-2.4.47-r1
+		>=sys-apps/tcp-wrappers-7.6.22-r1
+		>=sys-apps/util-linux-2.25.2-r2
+		>=sys-devel/gcc-4.6.4:*[cxx]
+		>=sys-libs/gdbm-1.11
+		>=sys-libs/glibc-2.20-r2
+		>=sys-libs/glibc-2.20-r2
+		>=sys-libs/libcap-2.22-r2
+		>=sys-libs/zlib-1.2.8-r1
+		>=x11-libs/libX11-1.6.2
+		>=x11-libs/libXcursor-1.1.14
+		>=x11-libs/libXinerama-1.1.3
+		freetype? ( >=media-libs/freetype-2.5.3-r1:2 )
+		llvm? ( >=sys-devel/llvm-3.6.0[clang] )
+		openssl? ( >=dev-libs/openssl-1.0.1j:0 )
+		png? ( >=media-libs/libpng-1.6.16:0= )
+		pulseaudio? ( >=media-sound/pulseaudio-5.0-r7 )
+		theora? ( media-libs/libtheora )
+		udev? ( virtual/udev )
+		virtual/glu
+		vorbis? ( >=media-libs/libvorbis-1.3.4 )
+		xml? ( >=dev-libs/expat-2.1.0-r3 )"
+
+RDEPEND="${DEPEND}"
+
+src_configure() {
+	MYSCONS=(
+		CC="$(tc-getCC)"
+		builtin_zlib=no
+		colored=yes
+		platform=x11
+		freetype=$(usex freetype)
+		openssl=$(usex openssl)
+		png=$(usex png)
+		pulseaudio=$(usex pulseaudio)
+		theora=$(usex theora)
+		udev=$(usex udev)
+		use_llvm=$(usex llvm)
+		vorbis=$(usex vorbis)
+		xml=$(usex xml)
+	)
+}
+
+src_compile() {
+	escons "${MYSCONS[@]}"
+}
+
+src_install() {
+	newicon icon.svg ${PN}.svg
+	dobin bin/godot.*
+	if [[ "${ARCH}" == "amd64" ]]; then
+		if use llvm; then
+			make_desktop_entry godot.x11.tools.64.llvm Godot
+			with_desktop_entry=1
+		else
+			make_desktop_entry godot.x11.tools.64 Godot
+			with_desktop_entry=1
+		fi
+	fi
+
+	if [[ "${ARCH}" == "x86" ]]; then
+		if use llvm; then
+			make_desktop_entry godot.x11.tools.32.llvm Godot
+			with_desktop_entry=1
+		else
+			make_desktop_entry godot.x11.tools.32 Godot
+			with_desktop_entry=1
+		fi
+	fi
+
+	if ! [[ "${with_desktop_entry}" == "1" ]]; then
+		elog "Couldn't detect running architecture to create a desktop file."
+	fi
+}