I was having a problem with installing python25 (2.5.1_3) where it would error on executing libtool with the diagnostic: ld: for architecture ppc ld: warning prebinding disabled because of undefined symbols ld: Undefined symbols: restFP saveFP libtool: internal link edit command failed make: *** [libpython2.5.dylib] Error 1 I recently upgraded to 10.4.11/Xcode 2.5/gcc4.0.1 from 10.3.9/gcc3.3 on a g4. Previously I had been able to install python25 successfully on 10.3.9 and was upgrading to the latest version. I found that I could overcome this two ways: 1. modifiying patch-Makefile.pre.in to have -L/usr/lib/gcc/powerpc- apple-darwin8/4.0.1/ -llibgcc [+ -current_version $(VERSION) -lSystem -lSystemStubs -L/usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/ -llibgcc $(LDFLAGS)].. 2. adding a soft link in /usr/lib to /usr/lib/gcc/powerpc-apple- darwin8/4.0.1/libgcc.a (ln -s /usr/lib/gcc/powerpc-apple- darwin8/4.0.1/libgcc.a libgcc4.a) and then modifying patch- Makefile.pre.in to have -lgcc4 [+ -current_version $(VERSION) -lSystem -lSystemStubs -lgcc4 $ (LDFLAGS)]. Since I don't have an intel Mac, I can only assume that linking to / usr/lib/gcc/i686-apple-darwin8/4.0.1/libgcc.a may help there. Hope this helps, John