[...]

Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/zlib-1.3.1-1.src.rpm
RPM build warnings:
    line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1
    line 117: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1-devel
real 0.08
user 0.06
sys 0.01
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1
warning: line 117: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1-devel
No conditional flags passed
from available:
--with   :	 asmopt
--without:	 tests
Available branches: AC-branch RA-branch master
zlib-1.3.1.tar.gz having proper md5sum already exists
./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1
warning: line 117: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1-devel
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/zlib-1.3.1-1.src.rpm
RPM build warnings:
    line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1
    line 117: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1-devel
real 0.07
user 0.07
sys 0.00
warning: line 33: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1
warning: line 117: It's not recommended to have unversioned Obsoletes: Obsoletes:	zlib1-devel
Writing git revision for tag tld/zlib-1.3.1-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:0.99s sys:0.28s real:3.45s (faults io:3 non-io:174020)
Files queued for ftp:
   1529162 zlib-1.3.1-1.src.rpm
       182 zlib-1.3.1-1.src.rpm.uploadinfo
End-TLD-Builder-Info