plplot fails to build

[Alexy Khrabrov]

Tried to build plplot today, it starts by pulling half the Horn of  
Africa such as gcc 4.2.4, tk, and such, and eventually bails with

/opt/local/var/macports/build/ 
_opt_local_var_macports_sources_rsync 
.macports.org_release_ports_science_plplot/work/plplot-5.9.0/drivers/ 
cairo.c:43:24: error: cairo-xlib.h: No such file or directory

Where do I get a fitting cairo-xlib.h to give it?
Cheers,
Alexy