How do I make a 32-bit build on my 64-bit system? CFLAGS=-m32 and CXXFLAGS=-m32 don't work, they log the following error:

configure:3455: gcc -m32-O6 -funroll-loops -fomit-frame-pointer   conftest.c  >&
5
cc1: error: unrecognized command line option "-m32-O6"
configure:3458: $? = 1
configure:3496: result:
configure: failed program was:
| /* confdefs.h.  */

I need the 32-bit build so I don't need to recompile my externals for 64-bit which never fully worked so far.

Thanks, Andras