i'm having a problem making tightvnc 1.2.9 from the ports

[bsd neophyte]

i'm trying to make tightvnc 1.2.9 from through the ports.
 
i have v.5.2 (unupdated) on a Sparc64 platform.
 
i constantly run into the following problem:
 
---------
rm -f bitmaputil.o
cc -c -O -pipe -ansi -pedantic -Dasm=__asm  -I../../.././/include/fonts
-I../inc
lude  -I../../.././ -I../../.././/exports/include  -DCSRG_BASED -DSHAPE
 
   -DGCCUSESGAS XFree86ServerDefines -DNDEBUG   -DFUNCPROTO=15 -DNARROWPROTO
bitmaputil.c
cc: XFree86ServerDefines: No such file or directory
*** Error code 1
 
Stop in /usr/ports/net/tightvnc/work/vnc_unixsrc/Xvnc/lib/font/bitmap.
*** Error code 1
 
Stop in /usr/ports/net/tightvnc/work/vnc_unixsrc/Xvnc/lib/font.
*** Error code 1
 
Stop in /usr/ports/net/tightvnc/work/vnc_unixsrc/Xvnc/lib.
*** Error code 1
 
Stop in /usr/ports/net/tightvnc/work/vnc_unixsrc/Xvnc.
*** Error code 1
 
Stop in /usr/ports/net/tightvnc/work/vnc_unixsrc.
*** Error code 1
 
Stop in /usr/ports/net/tightvnc.
--------------
 
any idea what's going on here?