sh bootstrap 
./configure CC='gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4' CPP=cpp CXX='g++ -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4' CXXCPP='g++ -E' --prefix=/opt/local 
make