Frédéric BOIS wrote: > Hi! > > I have a problem with a code segment (actually one line). If I compile > with no optimization (with or without debugging enabled) it's fine. > If I optimize (again with or without debugging) it fails for one > mis-computed line: > pifn->bOn = (*pdTime < *pdTnext); > if *pdTime is equal to *pdTnext (checked in gdb: print *pdTime - > *pdTnext returns zero and print (*pdTime < *pdTnext) returns 0 too) > the computed value of pifn->bOn is "1", and that's an error. I don't > know exactly what to do and I am in a rush. I could try to go around > all that, but an easy quick fix might be to turn off the optimization > of the routine. However, I don't know how to do that. > I get that with gcc 3.3.3 (suze linux), and on v 4.3.0 under debian > linux. Don't use "gcc -O". I know you probably want to de-optimize just one function, but you can't do that. However, I'd try to find the real bug. Andrew.