gnome 2.2 build fails with gstreamer

[Rohit Nafday]

I am running FreeBSD 4.7 with the latest XFree86.  I was trying to 
install gnome 2.2 and after doing a 'cvsup' of the ports tree, I tried 
to 'make install' the gnome2 port.   It died in building gstreamer 
 0.6.1.  Running 'make' in the gstreamer directory gives this:

../cothreads/.libs/libcothreads-gthreads.al(libcothreads_gthreads_la-pth_mctx.lo): 
In function `pth_mctx_set':
libcothreads_gthreads_la-pth_mctx.lo(.text+0x9b): undefined reference to 
`sigaltstack'
libcothreads_gthreads_la-pth_mctx.lo(.text+0x100): undefined reference 
to `sigaltstack'
libcothreads_gthreads_la-pth_mctx.lo(.text+0x112): undefined reference 
to `sigaltstack'
libcothreads_gthreads_la-pth_mctx.lo(.text+0x127): undefined reference 
to `sigaltstack'
libcothreads_gthreads_la-pth_mctx.lo(.text+0x158): undefined reference 
to `sigaltstack'
gmake[5]: *** [cothreads-gthreads] Error 1
gmake[4]: *** [all-recursive] Error 1
gmake[3]: *** [all-recursive] Error 1
gmake[2]: *** [all-recursive] Error 1
gmake[1]: *** [all-recursive] Error 1
gmake: *** [all] Error 2

I have no idea what's wrong with this or how to fix it.  Any help would 
be very appreciated.

Thanks,
Rohit