Problems with install port x11/libX11

[John Hein]

Pavel Prikhodko wrote at 09:43 +0300 on Aug 27, 2010:
 > checking host system type... i386-portbld-freebsd7.2
 > ./configure: 5489: Syntax error: word unexpected (expecting ")")
 > ===>  Script "configure" failed unexpectedly.

http://lists.freebsd.org/pipermail/freebsd-x11/2010-July/009952.html

You probably didn't follow 20090802 of ports/UPDATING
or read the archives (this is a FAQ candidate).