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diff --git a/sci-physics/bullet/bullet-2.85.ebuild b/sci-physics/bullet/bullet-2.85.ebuild
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+++ b/sci-physics/bullet/bullet-2.85.ebuild
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+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit cmake-utils
+
+DESCRIPTION="Continuous Collision Detection and Physics Library"
+HOMEPAGE="http://www.bulletphysics.com/"
+SRC_URI="https://github.com/bulletphysics/bullet3/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="ZLIB"
+SLOT="0/${PV}"
+KEYWORDS="~amd64 ~ppc64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="+bullet3 doc double-precision examples extras test"
+
+RDEPEND="
+	virtual/opengl
+	media-libs/freeglut"
+DEPEND="${RDEPEND}
+	doc? ( app-doc/doxygen[dot] )"
+
+PATCHES=( "${FILESDIR}"/${PN}-2.85-soversion.patch )
+
+DOCS=( AUTHORS.txt LICENSE.txt README.md )
+
+# Building / linking of third Party library BussIK does not work out of the box
+RESTRICT="test"
+
+S="${WORKDIR}/${PN}3-${PV}"
+
+src_prepare() {
+	cmake-utils_src_prepare
+
+	# allow to generate docs
+	sed -i -e 's/GENERATE_HTMLHELP.*//g' Doxyfile || die
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DBUILD_SHARED_LIBS=ON
+		-DBUILD_CPU_DEMOS=OFF
+		-DBUILD_OPENGL3_DEMOS=OFF
+		-DBUILD_BULLET2_DEMOS=OFF
+		-DUSE_GRAPHICAL_BENCHMARK=OFF
+		-DINSTALL_LIBS=ON
+		-DINSTALL_EXTRA_LIBS=ON
+		-DBUILD_BULLET3=$(usex bullet3)
+		-DBUILD_EXTRAS=$(usex extras)
+		-DUSE_DOUBLE_PRECISION=$(usex double-precision)
+		-DBUILD_UNIT_TESTS=$(usex test)
+	)
+	cmake-utils_src_configure
+}
+
+src_compile() {
+	cmake-utils_src_compile
+
+	if use doc; then
+		doxygen || die
+		HTML_DOCS+=( html/. )
+		DOCS+=( docs/*.pdf )
+	fi
+}
+
+src_install() {
+	cmake-utils_src_install
+
+	if use examples; then
+		dodoc -r examples
+		docompress -x /usr/share/doc/${PF}/examples
+	fi
+}