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

optional_depends  zlib                   \
                  "--with-zlib"          \
                  "--without-zlib"       \
                  "Show gzip compressed pages"  &&

optional_depends  bzip2                  \
                  "--with-bzip2"         \
                  "--without-bzip2"      \
                  "Show bzip2 compressed pages"  &&

optional_depends  xz-utils \
                  "--with-lzma" \
                  "--without-lzma" \
                  "to be able to decompress LZMA-compressed files" &&

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  libx11 \
                  "--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"
