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diff --git a/sci-visualization/gr/gr-0.50.0-r2.ebuild b/sci-visualization/gr/gr-0.50.0-r2.ebuild
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+# Copyright 2019-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit cmake
+
+DESCRIPTION="Universal framework for cross-platform visualization applications"
+HOMEPAGE="https://gr-framework.org/"
+SRC_URI="https://github.com/sciapp/gr/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="cairo ffmpeg postscript tiff truetype"
+
+DEPEND="
+	dev-qt/qtgui:5
+	media-libs/fontconfig
+	media-libs/glfw
+	media-libs/libjpeg-turbo
+	media-libs/libpng
+	media-libs/qhull
+	sys-libs/zlib
+	virtual/opengl
+	x11-libs/libX11
+	x11-libs/libXt
+	cairo? ( x11-libs/cairo )
+	ffmpeg? ( media-video/ffmpeg )
+	postscript? ( app-text/ghostscript-gpl )
+	tiff? ( media-libs/tiff )
+	truetype? ( media-libs/freetype )
+"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+PATCHES=(
+	"${FILESDIR}/${P}-qt-5.15.patch"
+)
+
+src_configure() {
+	use cairo || mycmakeargs+=( -DCAIRO_LIBRARY= )
+	use postscript || mycmakeargs+=( -DGS_LIBRARY= )
+	use ffmpeg || mycmakeargs+=( -DFFMPEG_INCLUDE_DIR= )
+	use truetype || mycmakeargs+=( -DFREETYPE_LIBRARY= )
+	use tiff || mycmakeargs+=( -DTIFF_LIBRARY= )
+
+	# todo: X11 automagic
+
+	mycmakeargs+=( -DCMAKE_INSTALL_PREFIX=/usr/gr )
+	#
+	# I need to have a serious conversation with upstream.
+	# * The main consumer of this package is dev-lang/julia.
+	# * If I patch gr to install in standard locations, julia does
+	#   not find it anymore.
+	# * I can't patch julia, since the corresponding scripts are
+	#   downloaded at runtime from its package registry ...
+	#
+
+	cmake_src_configure
+}
+
+src_install() {
+	cmake_src_install
+	find "${ED}" -name '*.a' -delete
+
+	echo "GRDIR=/usr/gr" > "${T}/99gr"
+	echo "LDPATH=/usr/gr/$(get_libdir)" >> "${T}/99gr"
+	doenvd "${T}/99gr"
+
+	[[ -f "${ED}/usr/gr/bin/gksqt" ]] && dosym ../gr/bin/gksqt /usr/bin/gksqt
+
+	elog "${P} relies on the environment variable GRDIR. If you want to use it in a running shell,"
+	elog "e.g. with dev-lang/julia, then run \"source /etc/profile\" first."
+}