depends perl &&
depends libpng &&
depends libxml2 &&
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 X11-LIBS yes-x11 no-x11 "x11 support"
