On Sun, May 29, 2011 at 1:51 PM, David Hagood <david.hagood@xxxxxxxxx> wrote: > Just for grins, what happens if you link main against Boost? > g++ -ldl host.cpp -o host -lboost_signals Already tried that. It doesn't make any difference. > Of course, this isn't really a GCC question, but a libc/binutils > question, so you may do better over on that list. Well, as this looks pretty much like voodoo to me (tracking it down was pretty fun) so I though it *might* be an issue with the code GCC generates, but if you say so then I'll try asking over there. Thanks.