error building gawk on Darwin 10.6 (Snow Leopard)

[Mark Norman Francis <norm%cackhanded.net@localhost>]

> gcc -dynamiclib  -o .libs/libsigsegv.1.0.0.dylib  .libs/ 
> handler.o .libs/stackvma.o .libs/leave.o .libs/dispatcher.o .libs/ 
> version.o  -lc -L/var/obj/pkg/lang/gawk/work/.buildlink/lib  - 
> install_name  /ports/lib/libsigsegv.1.dylib -compatibility_version 2  
> -current_version 2.0 -Wl,-single_module
> Undefined symbols:
>   "_vm_region", referenced from:
>       _sigsegv_get_vma in stackvma.o
> ld: symbol(s) not found
> collect2: ld returned 1 exit status
> *** Error code 1
>
> Stop.
> bmake: stopped in /var/obj/pkg/lang/gawk/work/gawk-3.1.7/libsigsegv/ 
> src

-- Norm.