Rafael Espíndola writes: > > because that is what the language standard says. > > > > In general, the difference between two global pointers is something > > known only to the linker -- too late to evaluate as constant > > expression. > In the particular case of two static functions or two static global > pointers, it is possible for the compiler to compute it. Isn't it? I > think that the linker will reorder the sections, but not the functions > inside a section. > > The reason why I want to do this is to avoid relocations when a dso is > loaded. Using the difference of two pointer I could build a constant > table and add one of the pointers at runtime.
This isn't possible with global symbols in a DSO because some other DSO (or indeed the exe) might also define one of the symbols. Andrew.
