[...]

RPM build warnings:
    line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
    line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
    line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
    line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
real 0.02
user 0.02
sys 0.00
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
warning: line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
warning: line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
warning: line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
warning: line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
Available branches: master
docbook-4.2.zip having proper md5sum already exists
./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
warning: line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
warning: line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
warning: line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/docbook-dtd42-sgml-1.0-2.src.rpm
RPM build warnings:
    line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
    line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
    line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
    line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
real 0.02
user 0.01
sys 0.01
warning: line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
warning: line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
warning: line 18: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook42-dtd
warning: line 19: It's not recommended to have unversioned Obsoletes: Obsoletes:	docbook-sgml-4.2
Writing git revision for tag tld/docbook-dtd42-sgml-1.0-2
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:0.59s sys:0.22s real:4.12s (faults io:51 non-io:114343)
Files queued for ftp:
     69474 docbook-dtd42-sgml-1.0-2.src.rpm
       194 docbook-dtd42-sgml-1.0-2.src.rpm.uploadinfo
End-TLD-Builder-Info