sys-libs/zlib:=
virtual/libintl

alsa?
      ( media-libs/alsa-lib )

curl?
      ( net-misc/curl )

ethernet?
      ( net-libs/libpcap sys-libs/libcap )

flac?
      ( media-libs/flac:= )

gif?
      ( media-libs/giflib:= )

gtk?
      ( >=app-accessibility/at-spi2-core-2.46:2 dev-libs/glib:2 media-libs/fontconfig:1.0 media-libs/glew:0=[-egl-only
            (-)
      ] media-libs/libglvnd[X] x11-libs/cairo x11-libs/gdk-pixbuf:2 x11-libs/gtk+:3[X] x11-libs/libX11 x11-libs/pango )

lame?
      ( media-sound/lame )

mpg123?
      ( media-sound/mpg123 )

ogg?
      ( media-libs/libogg media-libs/libvorbis )

parport?
      ( sys-libs/libieee1284 )

pci?
      ( sys-apps/pciutils )

png?
      ( media-libs/libpng:= )

portaudio?
      ( media-libs/portaudio )

pulseaudio?
      ( media-libs/libpulse )

sdl?
      ( media-libs/libsdl2[video] media-libs/sdl2-image )