[...]

No conditional flags passed
from available:
--with   :	
--without:	 static_libs
Available branches: AC-branch RA-branch master
Searching for tag auto/ti/libmatroska-1.5.2-1...
Searching for tag auto/ti/libmatroska-1_5_2-1...
--2019-08-13 18:36:52--  http://distfiles.pld-linux.org/by-md5/d/f/df59a50db89296cad8662abf596355a9/libmatroska-1.5.2.tar.xz
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: 64996 (63K) [application/octet-stream]
Saving to: 'libmatroska-1.5.2.tar.xz'
     0K .......... .......... .......... .......... .......... 78%  626K 0s
    50K .......... ...                                        100%  200M=0.08s
2019-08-13 18:36:52 (794 KB/s) - 'libmatroska-1.5.2.tar.xz' saved [64996/64996]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libmatroska-1.5.2-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
No conditional flags passed
from available:
--with   :	
--without:	 static_libs
Writing git revision for tag auto/ti/libmatroska-1.5.2-1
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.86430
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libmatroska-1.5.2
Begin-TLD-Builder-Info
Build-Time: user:0.67s sys:0.11s real:2.75s (faults io:0 non-io:98627)
Files queued for ftp:
     71027 libmatroska-1.5.2-1.src.rpm
       189 libmatroska-1.5.2-1.src.rpm.uploadinfo
End-TLD-Builder-Info