[...]

Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/libusb-1.0.27-1.src.rpm
RPM build warnings:
    line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1
    line 54: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1-devel
real 0.04
user 0.04
sys 0.00
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1
warning: line 54: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1-devel
No conditional flags passed
from available:
--with   :	 tests
--without:	 apidocs static_libs udev
Available branches: AC-branch RA-branch master
libusb-1.0.27.tar.bz2 having proper md5sum already exists
./builder[2756]: ulimit: unlimited exceeds allowable coredump(blocks) limit
warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1
warning: line 54: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1-devel
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/libusb-1.0.27-1.src.rpm
RPM build warnings:
    line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1
    line 54: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1-devel
real 0.04
user 0.03
sys 0.01
warning: line 30: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1
warning: line 54: It's not recommended to have unversioned Obsoletes: Obsoletes:	libusb0.1-devel
Writing git revision for tag tld/libusb-1.0.27-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:0.75s sys:0.29s real:3.36s (faults io:0 non-io:149183)
Files queued for ftp:
    654738 libusb-1.0.27-1.src.rpm
       185 libusb-1.0.27-1.src.rpm.uploadinfo
End-TLD-Builder-Info