Re: threads and kernel

[vibi <vibi_sreenivasan@cms.com>]

On Tue, 2007-10-23 at 07:14 +0200, Steve Graegert wrote:
> On 10/23/07, vibi <vibi_sreenivasan@cms.com> wrote:
> >  > "The init code used to set up the main program doesn't care about threads,
> >
> >  because it assumes that they won't be used anyway."
> >
> > when is init code linked to the program ,during the compile time or
> > during the run time?
> 
> It's being added by the linker at compile time.
> 
> 	\Steve

the application you gave earlier is linked without any knowledge of
multi-threading
so 

> cc test.c
> ./a.out

would fail

but you also said 

> cc test.c
> LD_PRELOAD=/usr/lib/libpthread.so ./a.out

will not fail

in both the cases same init code is added at compile time and you also
said that init code determines whether a program is multi-threaded.

So i am a little bit confused because how at run time the init code is
changed.

regards
vibi sreenivasan

> 
> Steve Grägert
> DigitalEther.de
> 

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