depends -sub CXX gcc  &&

optional_depends  nasm                        \
                  "--enable-nasm"             \
                  "--disable-nasm"            \
                  "for faster video overlay"  &&

optional_depends  libx11                          \
                  "--with-x"                      \
                  "--without-x"                   \
                  "for X11 video output support"  &&

if is_depends_enabled $SPELL libx11;then
  depends libice     &&
  depends libxext    &&
  depends libxrender &&
  optional_depends  libxrandr "--enable-video-x11-xrandr" '' "X11 Xrandr extension support" &&
  optional_depends libxxf86dga '--enable-dga' '' 'X11 DGA code' &&
  optional_depends libxxf86vm  '--enable-video-x11-vm' '' 'X11 VM extension' &&
  optional_depends libxinerama '--enable-video-x11-xinerama' '' 'Xinerama support'  &&
  optional_depends libxv       '--enable-video-x11-xv' '' 'XvImage extension'
fi  &&

optional_depends  aalib                      \
                  "--enable-video-aalib"     \
                  "--disable-video-aalib"    \
                  "for ascii art rendering"  &&

optional_depends  libggi                          \
                  "--enable-video-ggi"            \
                  "--disable-video-ggi"           \
                  "for GGI video output support"  &&

optional_depends  svgalib                             \
                  "--enable-video-svga"               \
                  "--disable-video-svga"              \
                  "for SVGAlib video output support"  &&

optional_depends  esound                          \
                  "--enable-esd"                  \
                  "--disable-esd"                 \
                  "for esd audio output support"  &&

optional_depends  alsa-lib                         \
                  "--enable-alsa"                  \
                  "--disable-alsa"                 \
                  "for alsa audio output support"  &&

optional_depends  nas                              \
                  "--enable-nas"                   \
                  "--disable-nas"                  \
                  "for nas audio output support"   &&

optional_depends  directfb                      \
                  "--enable-video-directfb"     \
                  "--enable-video-directfb=no"  \
                  "for DirectFB support"        &&

optional_depends  pulseaudio                       \
                  "--enable-pulseaudio"            \
                  "--disable-pulseaudio"           \
                  "for PulseAudio output support"

.