why "m32" in 'configuring kernel'?

[Sythos <sythos@sythos.net>]

I'm reading amd64 howto and I don't understand why in end section about
kernel configuration the FAQ say:

[cut]
Configuring the kernel

make HOSTCC="gcc -m32" ARCH="x86_64" menuconfig

Be sure to include IA32 emulation, otherwise you will not be able to run
multiarch or i386 binaries on your host system or in a chroot. And for
simplicity, build a monolithic kernel without any modules.

make HOSTCC="gcc -m32" ARCH="x86_64" bzImage
[cut]

why "m32" and not "m64"? 


Regards,
	Sythos

-- 

Signature under costruction