Re: what is libc_pic.a ?

[Mike Frysinger <vapier at gentoo dot org>]

On Saturday 12 January 2008, Metuki Sabhe wrote:
> On Jan 11, 2008 9:49 PM, Mike Frysinger <vapier@gentoo.org> wrote:
> > On Friday 11 January 2008, Metuki Sabhe wrote:
> > > what is the purpose of libc_pic.a ?
> >
> > it is a static archive of libc that is completely built as PIC
> >
> > > can you give an example of application that uses it ?
> >
> > it doesnt get installed so it only gets used by the glibc build system
>
> thank you Mike. I was wondering about libc_pic.a while looking for the
> definition of __umoddi3(). Before I realized that function belongs to
> libgcc, I found
> it also in libc_pic.a...

i doubt __umoddi3 is actually defined in libc_pic.a.  more likely libc_pic.a 
has an undefined reference to __umoddi3.

> I just wonder now whether libgcc can issue any system calls ? Now I really
> think not.

i think your definition of "system calls" is kind of vague.  gcc most likely 
will never actually execute a system call directly, but rather go through the 
C library.  there's no rules that say libgcc.a cannot call functions in the C 
library which cannot make system calls.  in fact, objects in libgcc.a most 
likely will contain references to functions in the C library which will 
execute a system call.

then again, i dont see why any of this matters whatsoever.
-mike

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