I am using AIX 5.3 xlc 9.0.  I am unable to get the libffi section to
build.  It also happens with the separate libffi code, so I will try to
report there as well.  I get the following:

cc_r -qlanglvl=extc89 -DNDEBUG -O -I.
-I/appl/bwc/src/Python-2.6.1/./Include
-Ibuild/temp.aix-5.3-2.6/libffi/include -Ibuild/temp.aix-5.3-2.6/libffi
-I/appl/bwc/src/Python-2.6.1/Modules/_ctypes/libffi/src
-I/appl/bwc/local2/include -I. -IInclude -I./Include
-I/usr/local/include -I/appl/bwc/src/Python-2.6.1/Include
-I/appl/bwc/src/Python-2.6.1 -c
/appl/bwc/src/Python-2.6.1/Modules/_ctypes/libffi/src/powerpc/aix_closure.S
-o
build/temp.aix-5.3-2.6/appl/bwc/src/Python-2.6.1/Modules/_ctypes/libffi/src/powerpc/aix_closure.o
Assembler:
/tmp/xlcS00-Mgqd.s: line 111: undefined symbol ".ffi_closure_helper_DARWIN"
/tmp/xlcS00-Mgqd.s: line 111: illegal expression type for branch address