rosetta 2.1.1- Installation problems in mac os x 10.6

Hi all, I have to install rosetta 2.1.1 since some code has been modified in this version by ourselves for special use two years ago. Now I have a problem about the installation.

I have successfully built rosetta 2.1.1 in Redhat by
$ make gcc64

the gcc version is :
gcc (GCC) 4.1.2 20070626 (Red Hat 4.1.2-14)
Copyright (C) 2006 Free Software Foundation, Inc.

However when I tried to build it in mac os x 10.6, I came across some errors.

In mac os x 10.6.8,

gcc version:
i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
Copyright (C) 2007 Free Software Foundation, Inc.

When I tried
$ sudo make mac

It can start to build, but it will terminate with the following errors:

ranlib 'lib/macos-ppc-32/libz.a'
g++ -Wl,-stack_size,4000000,-stack_addr,0xc0000000

......very long file here and the last several lines are :

ld: warning: in lib/macos-ppc-32/libz.a, file was built for unsupported file format which is not the architecture being linked (x86_64)
Undefined symbols:
"_main", referenced from:
start in crt1.10.6.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [rosetta.mac] Error 1

I also tried $ sudo make gcc

the errors are:

ranlib 'lib/linux-x86-32/libz.a'
ranlib: warning for library: lib/linux-x86-32/libz.a the table of contents is empty (no object file members in the library define global symbols)
g++ -static .gcc.version_rosetta.o

......very long file here and the last several lines are :

ld: library not found for -lcrt0.o
collect2: ld returned 1 exit status
make: *** [rosetta.gcc] Error 1

Could you give me some advice?

Thanks very much!