GTK2 & Cairo "Quartz" Variant

Hi. I noticed the following lines in GTK2's Portfile: pre-configure { if {[variant_isset quartz]} { if { ![file exists ${prefix}/include/cairo/cairo-quartz.h] } { ui_msg "\nYou must first build cairo with the quartz variant enabled. Please\nuninstall (or deactivate) the cairo port and reinstall by running:\n\n\"port install cairo +quartz\"\n" exit 1 } } ... variant quartz { configure.args-append --enable-gdktarget=quartz } Does this mean if I enable the quartz variant, I can compile GTK applications w/o X11?