Multiple Definition of Symbols

[yogesh . kini]

Hi all,
I am using gcc 4.0  with Xcode 2.2 on Mac OS 10.4.3.
I am using two static lib's in my project, which in turn include zlib.
I get "multiple definition of symbol"  Linker error.

While using msvc 7.0 linker flag "/FORCE:MULTIPLE" eliminates this
error.

Is there a similar flag for gcc?

or Can any one tell suggest a work around for this problem on Mac/gcc?

Thanks 
-- 
Yogesh Kini