> > Any tips on getting this to work right on x86-64? It is not liking the > combination of the %c0 input operand modifier 'c' and the 'n' constraint if the > provided constant exceeds a signed integer. I imagine some other > incantation would work but I'm not sure what. > > You can just paste it into the string here, like you have #name already? I can't without changing a lot of plumbing. Some values passed in need to be processed by the C compiler. For example in some cases sizeof(some struct) is used. Would this be considered a bug? On 32-bit x86 this works fine. Andrew