[...]

building SRPM using: cd rpm/packages; nice -n 0 ./builder -nu -nm --nodeps --http --define '_tld_builder 1' -bs  -r HEAD  -Tp auto/ti/ -tt   libtirpc.spec 2>&1
Cloning into 'libtirpc'...
f1c43687b6038ea1f8e1af4c9af1ac764aa9a025
Already on 'master'
Your branch is up to date with 'origin/master'.
Already up to date.
Available branches: master
Searching for tag auto/ti/libtirpc-1.0.3-1...
Searching for tag auto/ti/libtirpc-1_0_3-1...
--2018-05-25 17:35:12--  http://distfiles.pld-linux.org/distfiles/by-md5/f/8/f8403a10695348854e71d525c4db5931/libtirpc-1.0.3.tar.bz2
Resolving distfiles.pld-linux.org (distfiles.pld-linux.org)... 193.239.45.41
Connecting to distfiles.pld-linux.org (distfiles.pld-linux.org)|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 509831 (498K) [application/x-bzip2]
Saving to: 'libtirpc-1.0.3.tar.bz2'
     0K .......... .......... .......... .......... .......... 10% 1.24M 0s
    50K .......... .......... .......... .......... .......... 20% 2.47M 0s
   100K .......... .......... .......... .......... .......... 30% 50.3M 0s
   150K .......... .......... .......... .......... .......... 40% 90.3M 0s
   200K .......... .......... .......... .......... .......... 50% 2.54M 0s
   250K .......... .......... .......... .......... .......... 60% 84.3M 0s
   300K .......... .......... .......... .......... .......... 70% 51.2M 0s
   350K .......... .......... .......... .......... .......... 80% 48.9M 0s
   400K .......... .......... .......... .......... .......... 90% 2.95M 0s
   450K .......... .......... .......... .......... .......   100% 56.8M=0.1s
2018-05-25 17:35:12 (4.87 MB/s) - 'libtirpc-1.0.3.tar.bz2' saved [509831/509831]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libtirpc-1.0.3-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
Writing git revision for tag auto/ti/libtirpc-1.0.3-1
error: Macro %_builddir has empty body
error: Macro %_builddir has empty body
Executing(--clean): env -i TMP=/home/users/builder/tmp HOME=/home/users/builder PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.92260
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libtirpc-1.0.3
Begin-TLD-Builder-Info
Build-Time: user:0.99s sys:0.33s real:2.66s (faults io:0 non-io:96768)
Files queued for ftp:
    517157 libtirpc-1.0.3-1.src.rpm
       186 libtirpc-1.0.3-1.src.rpm.uploadinfo
End-TLD-Builder-Info