Re: Does GCC link only used functions?

[Hendrik Visage <hvjunk@gmail.com>]

On 1/29/06, Glynn Clements <glynn@gclements.plus.com> wrote:
>
> Shriramana Sharma wrote:

> > So does this mean that GCC links only those functions from a library which I
> > call directly or indirectly through another called function in the course of
> > my program?

> For a static library (which is just an archive of object files), the
> linker will only use those object files which are necessary to satisfy
> any outstanding references.

That means that all the functions and everything in that object file
is included?
thus given the lib.a contains obj1.o and obj2.o compiled from obj1.c &
obj2.c below,
the program main from main.c below, linked with lib.a will contain the
obj1.o part, which
will also include the superflouos int b() (That's the way I understood
it too), but not obj2 with c() & d(). that's the reason why static
libraries makes use of small objects to minimize the stuff linked in.

obj1.c:
int a(){return 1;}
int b(){return 2;}

obj2.c
int c(){return 3;}
int d(){return 4;}

main.c
int main(){
 return a();
}

--
Hendrik Visage