The hwloc header generates lots of warnings:
In file included from Action.c:10:
In file included from ./Action.h:15:
In file included from ./Header.h:10:
In file included from ./Meter.h:18:
In file included from ./ProcessList.h:25:
In file included from /usr/include/hwloc.h:2371:
/usr/include/hwloc/helper.h:481:5: warning: Value stored to 'state' is never read [deadcode.DeadStores]
state = 3;
^ ~
1 warning generated.