optional_depends  openssl                              \
                  "--with-ssl=/usr"                    \
                  "--without-ssl"                      \
                  "to support secure HTTP (https://)"  &&

optional_depends  flex                  \
                  "--with-libfl"        \
                  "--without-libfl"     \
                  "for parser support"  &&

optional_depends  sdl                         \
                  "--with-sdl"                \
                  "--without-sdl"             \
                  "to build with SDL support" &&

#
# Doesn't seem to be compiled when selected
#
#optional_depends  fbset                           \
#                  "--with-fb  --enable-graphics"  \
#                  "--without-fb"                  \
#                  "for LinuxFrameBuffer support"  &&

optional_depends  directfb                                               \
                  "--with-directfb  --enable-graphics"                   \
                  "--without-directfb"                                   \
                  "for DirectFB support, non-X text and graphics modes"  &&

optional_depends  svgalib                                                   \
                  "--with-svgalib  --enable-graphics"                       \
                  "--without-svgalib"                                       \
                  "for SVGA support, non-X-Window text and graphics modes"  &&

optional_depends  X11-LIBS                       \
                  "--with-x  --enable-graphics"  \
                  "--without-x"                  \
                  "for X11 support"              &&

optional_depends  jpeg                                \
                  "--with-libjpeg"                    \
                  "--without-libjpeg"                 \
                  "for JPEG support in optional GUI"  &&

optional_depends  tiff                                \
                  "--with-libtiff"                    \
                  "--without-libtiff"                 \
                  "for TIFF support in optional GUI"  &&

optional_depends  libpng                             \
                  "--with-libpng"                    \
                  "--without-libpng"                 \
                  "for PNG support in optional GUI"  &&

optional_depends  gpm                          \
                  "--with-gpm"                 \
                  "--without-gpm"              \
                  "for console mouse support"
