optional_depends graphviz ""     ""     "for documentation support"

optional_depends bison    "--with-bison"   "--without-bison"   "for bison support"
optional_depends iksemel  "--with-iksemel" "--without-iksemel" "for Jabber/iksemel support"
optional_depends pcre     "--with-pcre"    "--without-pcre"    "for PCRE support"
optional_depends zlib     "--with-zlib"    "--without-zlib"    "for compression support"
optional_depends %APACHE  "--with-httpd"   "--without-httpd"   "for Web server support"
optional_depends gtk+-2   "--with-gtk"     "--without-gtk"     "for GTK graphics support"
optional_depends perl     "--with-perl"    "--without-perl"    "for perl scripting support"
optional_depends ncurses  "--with-curses"  "--without-curses"  "for ncurses support"
optional_depends curl     "--with-curl"    "--without-curl"    "for curl support"
optional_depends CGAL     "--with-mpz"     "--without-mpz"     "for geometry algorithm support"

optional_depends PDFlib-Lite "--with-pdf"      "--without-pdf"      "for pdf file support"
optional_depends postgresql  "--with-pgsql"    "--without-pgsql"    "for Postgresql database support"
optional_depends mysql       "--with-mysql"    "--without-mysql"    "for mysql database support"
optional_depends unixODBC    "--with-unixodbc" "--without-unixodbc" "for Open Database Connectivity support"
optional_depends sqlite      "--with-sqlite"   "--without-sqlite"   "for sqlite database support"

optional_depends %JAVA_SDK   "--with-java=$JAVA_HOME" \
                             "--without-java"         \
                             "for Java support"

optional_depends libiodbc    "--with-iodbc=/usr" \
                             "--without-iodbc"   \
                             "for iODBC/Openlink support"

