This build script should be placed in the root zziplib source folder and run. Once done, the results are in universal_obj and universal_debug_obj.

It assumes that you're running on an i386 Mac; if you're on PPC then you'll need to alter the host and target options to cross-compile appropriately.

#!/bin/sh

# Assumes that you're building on i386
 
# Instructions on how to cross build libzzip.a
mkdir ppc_obj i386_obj universal_obj
mkdir ppc_debug_obj i386_debug_obj universal_debug_obj    
 
# Build release version of the libraries.
pushd ppc_obj
../configure CFLAGS="-isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch ppc"  LDFLAGS="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk -arch ppc" --host i386 --target ppc
make
popd

pushd i386_obj
../configure CFLAGS="-isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386"  LDFLAGS="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk -arch i386" 
make
popd

pushd universal_obj
lipo ../ppc_obj/zzip/.libs/libzzip.a ../i386_obj/zzip/.libs/libzzip.a -create -output libzzip.a
popd

# Build debug versions of the libraries.
pushd ppc_debug_obj
../configure CFLAGS="-g -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch ppc -g"  LDFLAGS="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk -arch ppc" --host i386 --target ppc
make
popd

pushd i386_debug_obj
../configure CFLAGS="-g -isysroot /Developer/SDKs/MacOSX10.4u.sdk -arch i386 -g" LDFLAGS="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.4u.sdk -arch i386" 
make
popd

pushd universal_debug_obj
lipo ../ppc_debug_obj/zzip/.libs/libzzip.a ../i386_debug_obj/zzip/.libs/libzzip.a -create -output libzzip.a
popd