Maxima requirements.

profiles/default/linux/amd64/13.0/backbone/desktop/package.accept_keywords

@@ -34,6 +34,8 @@ app-emulation/qemu ~amd64
 <app-emulation/virtualbox-modules-4.4.0 ~amd64
 app-emulation/wine ~amd64
 app-emulation/winetricks ~amd64
+<sci-mathematics/maxima-5.33 ~amd64
+<sci-mathematics/wxmaxima-14 ~amd64
 =sci-misc/labview-8.6.0 ~amd64
 app-misc/gnomecatalog ~amd64
 app-misc/nixnote ~amd64
@@ -88,6 +90,7 @@ dev-libs/libpeas ~amd64
 dev-libs/nspr ~amd64
 <dev-libs/nss-3.17 ~amd64
 dev-libs/vala-common ~amd64
+dev-lisp/gcl ~amd64
 <dev-lua/lgi-0.7 ~amd64
 dev-python/alembic ~amd64
 dev-python/amqplib ~amd64
@@ -212,6 +215,7 @@ games-util/steam-launcher ~amd64
 games-util/steam-meta ~amd64
 mail-client/thunderbird ~amd64
 mail-client/thunderbird-bin ~amd64
+<media-fonts/jsmath-2.0 ~amd64
 <media-gfx/gimp-2.9.0 ~amd64
 <media-gfx/splashutils-1.5.5 ~amd64
 media-gfx/shotwell ~amd64

profiles/default/linux/amd64/13.0/backbone/desktop/package.use

@@ -118,6 +118,8 @@ net-voip/linphone gtk
 net-voip/ekiga gstreamer gtk
 net-wireless/hostapd logwatch
 sci-geosciences/googleearth qt-bundled
+sci-mathematics/maxima gcl latex
+sci-visualization/gnuplot wxwidgets
 sys-auth/consolekit policykit
 sys-auth/keystone mysql
 sys-apps/tuxonice-userui fbsplash

profiles/default/linux/amd64/13.0/backbone/desktop/profile.bashrc

@@ -75,6 +75,7 @@ if [[ true != false
 && ${CATEGORY}/${PN} != gnome-base/gvfs
 && ${CATEGORY}/${PN} != app-text/aspell
 && ${CATEGORY}/${PN} != dev-libs/libsigsegv
+&& ${CATEGORY}/${PN}-${PV} != sys-libs/db-4.5.20_p2
 ]] ; then
     tmp="-flto=4"
     CFLAGS="${CFLAGS} ${tmp}"