Adding a new function to memcpy.c

Rodrigo Dominguez roddomi@hotmail.com
Fri Aug 8 00:40:00 GMT 2008


Ryan,

Thanks. That worked. What is this file string/Versions? Can you tell me more 
about these files?

Rodrigo

>From: "Ryan Arnold" <ryan.arnold@gmail.com>
>To: "Rodrigo Dominguez" <roddomi@hotmail.com>
>CC: libc-help@sourceware.org
>Subject: Re: Adding a new function to memcpy.c
>Date: Thu, 7 Aug 2008 15:05:12 -0500
>
>On Thu, Aug 7, 2008 at 2:40 PM, Rodrigo Dominguez <roddomi@hotmail.com> 
>wrote:
> > Hi,
> >
> > I am trying to create a new library function which I want to call 
>memcpy_TC.
> > I want memcpy_TC to be an exact clone of memcpy. I made the 
>corresponding
> > modifications to string/memcpy.c, string/string.h and include/string.h 
>to
> > include my new function. I also removed sysdeps/.../memcpy.S. However, 
>after
> > I build, memcpy_TC is defined as a local symbol in libc.so:
> >
> > $nm ../glibc-obj/libc.so | grep memcpy
> > 0006ebc0 t __GI_memcpy
> > 0006ec10 t __GI_memcpy_TC
> > 0006ebc0 T memcpy
> > 0006ec10 t memcpy_TC
> >
> > I tracked back the build process and I found that libc.so is built from
> > libc_pic.os. What I find very strange is that memcpy_TC is defined as a
> > global symbol in libc_pic.os. How can it change from global to local 
>during
> > the linking of libc.so? Am I missing something here?
>
>You need to export it in the string/Versions file.
>
>Ryan




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