Unable to compile i386 compatible ffmpeg dylibs on Mac OS X-Collection of common programming errors

I’m running 64-bit Lion but I need to compile a 32-bit version of ffmpeg because another library I’m using is only available as 32-bit. I’ve tried a number of different configurations but they’re all giving me errors. Here’s what I’ve tried:

./configure –disable-static –enable-shared –disable-outdev=sdl –disable-bzlib –disable-libfreetype –disable-libopenjpeg –enable-zlib –enable-runtime-cpudetect –arch=i386 –extra-cflags=”-arch i386″ –extra-ldflags=”-arch i386″ –target-os=darwin –enable-cross-compile

./configure –disable-static –enable-shared –disable-outdev=sdl –disable-bzlib –disable-libfreetype –disable-libopenjpeg –enable-zlib –enable-runtime-cpudetect –arch=i386 –extra-cflags=”-arch i386″ –extra-ldflags=”-arch i386″

./configure –disable-static –enable-shared –disable-outdev=sdl –disable-bzlib –disable-libfreetype –disable-libopenjpeg –enable-zlib –enable-runtime-cpudetect –arch=x86_32

I either get a “ran out of registers during register allocation” error during make or gcc complains that cross-compile is not active.