problem making xvid

when i try to build xvidcore-1.1.0-beta2 on fedora core 4 using gcc 
4.0.1 i get the following error:

[steve@lappy generic]$ make
  D: =build
  C: ./decoder.c
cc1: error: unrecognized command line option "-freduce-all-givs"
make: *** [decoder.o] Error 1

i'm guessing gcc 4 doesn't like whatever -freduce-all-givs is.  is there 
any way to turn off that compile option?  some other fix perhaps?

thanks,
steve