dev-tcltk/tcl3d: Fix missing RDEPEND and modularize

Closes: https://bugs.gentoo.org/619410
Package-Manager: Portage-2.3.49, Repoman-2.3.10

dev-tcltk/tcl3d/metadata.xml

@@ -5,6 +5,14 @@
 	<email>[email protected]</email>
 	<name>Gentoo Tcltk Project</name>
 </maintainer>
+<use>
+	<flag name="ode">
+		Enable support for physics engine from <pkg>dev-games/ode</pkg>
+	</flag>
+	<flag name="osg">
+		Enable support for 3D toolkit from <pkg>dev-games/openscenegraph</pkg>
+	</flag>
+</use>
 <longdescription>
 Tcl3D offers the 3D functionality of OpenGL and other 3D libraries at the Tcl scripting level.
 The Tcl3D package currently consists of the following modules:

dev-tcltk/tcl3d/tcl3d-0.5.0.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -12,26 +12,25 @@ SRC_URI="http://www.tcl3d.org/download/${P}.distrib/${PN}-src-${PV}.zip"
 LICENSE="BSD"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE="debug"
+IUSE="debug ode osg sdl truetype"
 
-DEPEND="
-	>=dev-lang/swig-1.3.38:0=
+RDEPEND="dev-lang/tcl:0=
 	dev-lang/tk:0=
-	dev-lang/tcl:0=
-	dev-games/ode
-	dev-games/openscenegraph
-	media-libs/libsdl
-	media-libs/ftgl
-	virtual/opengl
+	x11-libs/libXi
 	x11-libs/libXmu
-"
+	virtual/opengl
+	virtual/glu
+	ode? ( dev-games/ode )
+	osg? ( dev-games/openscenegraph )
+	truetype? ( media-libs/ftgl )
+	sdl? ( media-libs/libsdl )"
+DEPEND="${RDEPEND}
+	>=dev-lang/swig-1.3.38:0="
 
 S="${WORKDIR}/${PN}"
 PATCHES=( "${FILESDIR}/${P}-include-tk-dir-and-permissive.patch" )
 
-src_prepare() {
-	default
-
+src_configure() {
 	local _TCL_V=( $(echo 'puts [info tclversion]' | tclsh | tr '.' ' ') )
 	local _TCL_FV="${_TCL_V[0]}.${_TCL_V[1]}"
 
@@ -49,6 +48,13 @@ src_compile() {
 	append-flags -fPIC
 	use debug || append-flags -DNDEBUG
 
+	# Configure wrapper
+	local CONFIG_PLUGIN="WRAP_GL2PS="
+	use truetype || CONFIG_PLUGIN+=" WRAP_FTGL="
+	use ode || CONFIG_PLUGIN+=" WRAP_ODE="
+	use osg || CONFIG_PLUGIN+=" WRAP_OSG="
+	use sdl || CONFIG_PLUGIN+=" WRAP_SDL="
+
 	# Restricting build to -j1 since it seems that if we build it in parallel,
 	# it fails with the "tcl3dOsg" project attempting to import glewdefs.i,
 	# and not finding it.
@@ -59,10 +65,7 @@ src_compile() {
 		CC="$(tc-getCC) -c" \
 		CXX="$(tc-getCXX) -c" \
 		LD="$(tc-getLD)" \
-		WRAP_FTGL=1 \
-		WRAP_SDL=1 \
-		WRAP_GL2PS=0 \
-		WRAP_ODE=1
+		${CONFIG_PLUGIN}
 }
 
 src_install() {