resolution of references by the compiler/linker

[Rahul]

Hi Everyone,

I was wondering if references to a function defined in another file
is resolved at linker time, why isn't the same extended for global
variables? I mean, without the extern keyword being used... does the
standard say that reference to global variables have to be resolved at
compile time?

Thanks in advance!!!

 

[Ian Collins]

Hi Everyone,

I was wondering if references to a function defined in another file
is resolved at linker time, why isn't the same extended for global
variables? I mean, without the extern keyword being used... does the
standard say that reference to global variables have to be resolved at
compile time?

Declaring a variable extern is what makes it a global.

 

[Rahul]

Declaring a variable extern is what makes it a global.

Sorry wanted to post in comp.lang.c where compiler assumes that a
undeclared function would return an int and would be defined in some
other compilation unit... c++ makes sure that a prototype is very much
necessary for a function call...