Description of Problem:
It is impossible to build any package on SPARC ULTRA10
(sun4u) platform. The RPM 4 treat this platform as
sparc64, but cc can't generate sparc64 code:
RPM_OPT_FLAGS="-O2 -m64 -mcpu=ultrasparc"
cc1: -m64 is not supported by this configuration

 As it is known, RedHat RPM produces i386 packages
for Intel platform even for i686 machines by default.

 How to produce sparc32 RPMs like this ?
$ file /bin/ls
/bin/ls: ELF 32-bit MSB executable, SPARC, version 1,
dynamically linked (uses shared libs), stripped

Version-Release number of selected component (if applicable):
rpm-devel-4.0.2-6x
rpm-build-4.0.2-6x
rpm-4.0.2-6x
egcs-1.1.2-30

How Reproducible:
Try to build any SRPM on SPARC ULTRA10 (sun4u)

Steps to Reproduce:
1. 
rpm -ba package.src.rpm


Actual Results:
cc1: -m64 is not supported by this configuration
make[1]: *** [package] Error 1


Expected Results:
built RPM

Additional Information: