[CentOS] rpmbuild dwz error

Fri Aug 21 15:51:40 UTC 2015
Andrew Neuschwander <andrew.neuschwander at nih.gov>

CentOS,

I'm not sure where to ask this, please let me know if there is a more 
appropriate place.

On CentOS 7, I'm building a large C++ package with rpmbuild. Arachne 
(https://www.broadinstitute.org/crd/wiki/index.php/Arachne_Main_Page).

During the debuginfo extraction stage, I get the following error:

+ /usr/lib/rpm/find-debuginfo.sh --strict-build-id -m --run-dwz 
--dwz-low-mem-die-limit 10000000 --dwz-max-die-limit 110000000 
/home/andrew/rpmbuild/BUILD/arachne-46233
dwz: Multifile temporary files too large
cpio: /builddir/build/BUILD/glibc-2.17-c758a686/math: Cannot stat: No 
such file or directory
cpio: arachne-46233/src/Calculator.cc: Cannot stat: No such file or 
directory
cpio: arachne-46233/src/Calculator.y: Cannot stat: No such file or directory
36150 blocks

rpmbuild/dwz appear to be using /var/tmp for large temporary debug info 
files. This package generates over 30GB of debug data and I think it is 
filling up /var/tmp leading to the error. How can I tell rpmbuild to use 
an alternative temporary file location?

Thanks,
-Andrew