[OpenBIOS] Help with building

[Programmingkid]

When I try to build OpenBIOS, I see this error message:

Building OpenBIOS for x86
Building...error:
  GEN   target/include/openbios-version.h
  GEN   forth/version.fs
 HOSTCC host/kernel/dict.o
 HOSTCC host/kernel/bootstrap.o
 HOSTCC host/kernel/forth.o
 HOSTCC host/kernel/stack.o
 HOSTCC forthstrap
  GEN   bootstrap.dict
panic: segmentation violation at 0x30061c
dict=0x100300000 here=0x100300628(dict+0x628) pc=0x0(dict+0xffd00000)
dstackcnt=0 rstackcnt=0 instruction=deadbeef
dstack: 0x0
rstack: 0x0
Writing dictionary core file
make[1]: *** [bootstrap.dict] Error 1
make: *** [build] Error 1

Anyone know where the building fails? 

Here are the details:
OS: Mac OS 10.6
gcc -v: 4.2.1
target: unix-x86