Building i386 RPMs on x86_64

[Dave Atkinson]

Sorry if this issue's been addresses before (is there an effective way
to search fedora mailing lists?).

I've been trying to build some i386 RPMs on my x86_64 machine using

$ rpmbuild -ba --target i386 <spec file>

and it seems that this gives me library directories for 64-bit
libraries.  Specifically the %configure macro sets _libdir to
%{prefix}/lib64, but it should be %{prefix}/lib for i[3456]86 etc.

Am I missing something?

Regards,
Dave Atkinson