While building the hwloc utilities the building process stopped with the following error message (on Ubuntu 14.04.2 LTS):
Copying hwloc-ls from /usr/bin/hwloc-ls to /home/bruno/tmp/zz_et/Cactus/exe/et Copying hwloc-ps from /usr/bin/hwloc-ps to /home/bruno/tmp/zz_et/Cactus/exe/et Copying lstopo from /usr/bin/lstopo to /home/bruno/tmp/zz_et/Cactus/exe/et make: *** No rule to make target `/home/bruno/tmp/zz_et/Cactus/exe/et/lstopo-no-graphics', needed by `utils'. Stop.
A quick fix would be to add the hwloc-nox package which has the lstopo-no-graphics utility there, however it conflicts with hwloc package so we can't have both on a ubuntu system. So we can't then have both lstopo and lstopo-no-graphics in the makefile target. The attached patch opted to drop lstopo-no-graphics.