Le 17/01/2013 21:00, Erik Schnetter a écrit :
Given that the Cray compiler aborts on this code with an incorrect error message, I would actually call it a compiler bug. The compiler may possibly want to complain that it doesn't know __builtin_ffsl, but its error message (Declaration is incompatible with "int ffsl(long)") indicates that there is some other problem. Note that hwloc never declares ffsl; it only calls __builtin_ffsl.

However, I have a work-around, and leave it up to you to report this or not.

Ok thanks for the debugging, Erik and Jeff.
I am going to release 1.6.1 without any such change. If we ever get similar reports in the future, we'll reconsider and may add a configure-workaround.