depends JPEG &&
depends GIFLIB &&
depends libpng &&
optional_depends -sub JAVA gcc \
                 '--enable-gcj' \
                 '--disable-gcj' \
                 'enable gcj support?' &&
optional_depends zlib \
                 '--enable-zlib-zip' \
                 '--disable-zlib-zip' \
                 'enable java.util.zip implementation using zlib?' &&
optional_depends libffi \
                 '--enable-libffi' \
                 '--disable-libffi' \
                 'use libffi for sysdepCallMethod?' &&
optional_depends X11-LIBS \
                 '--with-x' \
                 '--without-x' \
                 'enable X11 support?'

.