Building Qt 4.7.4 32 bit libraries on Mac

I know I have to "./configure" and then make. but which platform d开发者_如何学Pythono I use? I'd like to use GCC 32-bit on my Mac. what's the equivalent --Platform parameter value for it?

I need to build 32 bit libraries because when I install Qt SDK 1.1.3 (including Qt. 4.7.4) on a clean machine (xCode 4.1 present) I only get 64 bit build options in Qt-Creator in Mac OSX. Although 32 bit tool-chains are available (I can see that by clicking "manage").

You need to specify two things, one that it needs to use GCC, and the other that it's 32 bit. GCC is specified with -platform macx-g++42 and the other is just the simple -arch x86