libc behind the curtain

[Mike Frysinger]

On Monday 11 June 2007, Metuki Sabhe wrote:
> On 6/11/07, Mike Frysinger <vapier@gentoo.org> wrote:
> > On Monday 11 June 2007, Metuki Sabhe wrote:
> > > when I build a simple C program, I see it is linked against:
> > >
> > > crt1.o
> > > crti.o
> > > crtbegin.o
> > > -lgcc
> > > -lgcc_s
> > > crtend.o
> > > crtn.o
> > >
> > > What are those files ?
> >
> > the crt files are the C RunTime files while the -l libraries are internal
> > gcc libraries
>
> does the gcc libraries add code to the final executable too ?

only when it's needed ... give the linker -M to have ld print out a linker map 
so you can see where everything is coming from and going to

> where can I read the sources for the C RunTime files (i didn't find any
> crt* in glibc-2.5) ?

start in the csu/ directory and work your way out from there
-mike
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