On 20/09/10 17:10, Miles Bader wrote: > Andrew Haley <aph@xxxxxxxxxx> writes: >> It's actually part of the C standard: there may only be one definition >> of any symbol, whether that symbol refers to a function or to data. So, >> for every visible symbol X in a program, &X must be the same, no matter >> who is asking. All manner of things break without this. > > Are symbols in a shared object loaded with e.g. dlopen "visible" (in the > sense of being unified with symbols in the executable, not visible via a > special lookup like dlsym)? That depends on the options you use. man dlopen explains it. Andrew.