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Description of problem:
rpmbuild strace-5.1-1.el8.src.rpm on rhel-8.3 s390x fails with the following:

[root@ibm-z-146 ~]# rpmbuild -bc rpmbuild/SPECS/strace.spec 
error: line 112: Illegal char ')' (0x29) in: Obsoletes: strace32 < 5.1 strace32(s390-32) < 5.1
error: line 112: Only package names are allowed in Obsoletes: Obsoletes: strace32 < 5.1 strace32(s390-32) < 5.1
[root@ibm-z-146 ~]#

This failure was not seen on the other rhel-8 supported architectures.

Version-Release number of selected component (if applicable):
strace-5.1-1.el8.src.rpm
rpm-build-4.14.3-4.el8.s390x
RHEL-8.3.0-20200701.n.0

How reproducible:
100%

Steps to Reproduce:
1. yum-builddep strace-5.1-1.el8.src.rpm
2. rpm -ivh strace-5.1-1.el8.src.rpm
3. rpmbuild -bc rpmbuild/SPECS/strace.spec

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (strace bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2021:1573