I found it a very strong limitation that fnccheck
doesn't work at all with any kind of optimization
turned on. This is a real problem, IMHO, particularly
for a compiler like GCC, whose unoptimized code is
almost unbearably bad. Profiling such unoptimized code
may give results biassed enough to be unusable.
So, please, could we add support for profiling
optimized code, too?