depends perl    &&
depends libpng  &&
depends libxml2 &&

if [[ $NETPBM_SVN == y ]]; then
  depends SVN
fi &&

optional_depends JPEG yes-jpeg no-jpeg "jpeg support" &&
optional_depends tiff yes-tiff no-tiff "tiff support" &&
optional_depends zlib yes-zlib no-zlib "compression support" &&
optional_depends svgalib yes-svga no-svga "svgalib support" &&
optional_depends libx11 yes-x11 no-x11 "x11 support"