Force gcc to compile 32 bit programs on 64 bit platform

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I've got a proprietary program that I'm trying to use on a 64 bit system.

When I launch the setup it works ok, but after it tries to update itself and compile some modules and it fails to load them.

I'm suspecting it's because it's using gcc and gcc tries to compile them for a 64 bit system and therefore this program cannot use these modules.

Is there any way (some environmental variables or something like that) to force gcc to do everything for a 32 bit platform. Would a 32 bit chroot work?

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