What "target" macros are loaded? (With --target option.)

[Toralf Lund <toralf procaptura com>]

On my Enterprise Linux installation, the default "macrofiles" setup is

/usr/lib/rpm/macros:/usr/lib/rpm/%{_target}/macros:/etc/rpm/macros.specspo:/etc/rpm/macros.prelink:/etc/rpm/macros.solve:/etc/rpm/macros.up2date:/etc/rpm/macros:/etc/rpm/%{_target}/macros:~/.rpmmacros

I thought this meant that if I did

rpmbuild --target <something>

then /usr/lib/rpm/<something>/macros and /etc/rpm/<something>/macros 
would be loaded (among other things), but based on experiments I just 
did, it looks like this is not the case. In fact, it seems like rpmbuild 
will still look for /usr/lib/rpm/i686-redhat-linux-gnu/macros and 
/etc/rpm/i686-redhat-linux-gnu/macros, i.e. that "--target" has no 
effect on the macro file search. Is that right? Is it the way it's 
supposed to be?

rpm version is 4.2.3-24_nonptl.

- Toralf