zahed khurasani <sdzahed@xxxxxxxxx> writes: >> Unless my knowledge of C is wrong here, both 'int i' and 'extern int i' are >> indistinguishable declarations (not definitions). An explicit initialization >> would be needed to make the second a definition: int i = 0. Isn't this the >> case here? > > Explicitly initializing the variable only has effect on where the > variable is allocated space. In this case, explicit initialization > moves the variable out of the common area into the data segment. > Hence, DECL_COMMON returns 0 when we do this. The point being, both > are definitions. Where as an extern declaration is an explicit > reference to an externally defined variable (which can be outside the > current translation unit). Please correct me if I am wrong on this. > Appreciate your help. OK, I actually tried it. When I try this with current mainline, I see that DECL_EXTERNAL is set for "extern int j;" and is not set for "int i;". Also TREE_STATIC is set for "int i;" but not for "extern int j;". Ian
