Installing SWIG on AIX with xlc

Greetings,

I'm trying to install SWIG on an AIX 5.3 machine with the xlc
compiler. I've unzipped the package, and then I give the ./configure
CC=xlc command, which works just fine. However, when I run make, I get
the following errors:

        make  all-am
        source='CParse/cscanner.c' object='CParse/cscanner.o' libtool=no  DEPDIR
=.deps depmode=aix /bin/sh ../Tools/config/depcomp  /usr/vacpp/bin/xlC_r -DHAVE_
CONFIG_H      -I../Source/Include        -I../Source/CParse      -I../Source/Inc
lude             -I../Source/DOH                 -I../Source/CParse
 -I../Source/Preprocessor        -I../Source/Swig                -I../Source/Mod
ules -g -Wall -W -ansi -pedantic -c -o CParse/cscanner.o CParse/cscanner.c
/usr/vacpp/bin/xlC_r: 1501-210 (S) command option Wall contains an incorrect sub
argument
make: 1254-004 The error code from the last command is 40.

Stop.
make: 1254-004 The error code from the last command is 2.

Stop.
make: 1254-004 The error code from the last command is 2.

Stop.

I notice that it's trying to use the -Wall option, which is a gcc
option that is not recognized by xlc. Has anyone encountered this
problem before, or done anything fancy to get SWIG installed on AIX?
Any help would be appreciated.