Small? request for ld --gc-sections

Small? request for ld --gc-sections

[Etienne Lorrain]

  Hello,

 If it is not too difficult, it would be nice to not consider a symbol
 in the linker script as referenced - in the sense of gc-section - if it
 is just a renaming.

 I have at the end of my linker file:
library_sprintf = sprintf ;
 And in one configuration, the symbol "library_sprintf" is not used,
 "sprintf" is not used neither, but the function "sprintf" is included
 in the link (ld --gc-section) because of this linker line.

 I tried something like:
PROVIDE (library_sprintf = sprintf) ;
 but have the same result.

  Thanks,
  Etienne.

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Re: Small? request for ld --gc-sections

[Alan Modra]

On Wed, Aug 15, 2001 at 05:57:14PM +0200, Etienne Lorrain wrote:
> 
>  I have at the end of my linker file:
> library_sprintf = sprintf ;
>  And in one configuration, the symbol "library_sprintf" is not used,
>  "sprintf" is not used neither, but the function "sprintf" is included
>  in the link (ld --gc-section) because of this linker line.

I can't reproduce this behaviour. ie. I can reference a function in the
linker script via an assignment, and have the function removed.  Are you
sure garbage collection is being done at all?  Note that if linking
against a shared lib, gc won't run.

Mon Oct  5 10:06:22 1998  Catherine Moore  <clm@cygnus.com>

	* elflink.h (elf_gc_sections):  Do not allow garbage
	collection if dynamic sections have been created.

I'm not sure why there is this restriction.  Catherine?

Alan

Re: Small? request for ld --gc-sections

[Etienne Lorrain]

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--- Alan Modra <amodra@bigpond.net.au> a écrit :
> On Wed, Aug 15, 2001 at 05:57:14PM +0200, Etienne Lorrain wrote:
> > 
> >  I have at the end of my linker file:
> > library_sprintf = sprintf ;
> >  And in one configuration, the symbol "library_sprintf" is not used,
> >  "sprintf" is not used neither, but the function "sprintf" is included
> >  in the link (ld --gc-section) because of this linker line.
> 
> I can't reproduce this behaviour. ie. I can reference a function in the
> linker script via an assignment, and have the function removed.  Are you
> sure garbage collection is being done at all?

  Really sorry, my fault: Garbage collection was not enabled in this
 configuration - my Makefile is a bit too complex.

  Thanks,
  Etienne.

___________________________________________________________
Do You Yahoo!? -- Vos albums photos en ligne, 
Yahoo! Photos : http://fr.photos.yahoo.com