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Re: Can LD give warnings about the non-static functions defined but never used explicitly?

From: Alan Modra <amodra at bigpond dot net dot au>
To: Pan ruochen <panruochen at gmail dot com>
Cc: binutils at sourceware dot org
Date: Wed, 26 Nov 2008 12:58:15 +1030
Subject: Re: Can LD give warnings about the non-static functions defined but never used explicitly?
References: <af0faace0811232319n6e6789e5t6cc39ff5be836ed4@mail.gmail.com> <492AD467.1040109@caviumnetworks.com> <af0faace0811251803h6f693ad1h4bc1c97e02928bd5@mail.gmail.com>

On Wed, Nov 26, 2008 at 10:03:45AM +0800, Pan ruochen wrote:
> > Compile your code with -ffunction-sections -fdata-sections.
> >
> > Then link with -Wl,--gc-sections
> 
> One more question. I have some data stored in a special section. These
> data are not referenced within the program but these data are useful
> to an external loader. In this case, how to let LD know the data are
> `used' and keep them on linking.

Specify a symbol in that section on the command line with -u.

-- 
Alan Modra
Australia Development Lab, IBM

References:
- Can LD give warnings about the non-static functions defined but never used explicitly?
  - From: Pan ruochen
- Re: Can LD give warnings about the non-static functions defined but never used explicitly?
  - From: David Daney
- Re: Can LD give warnings about the non-static functions defined but never used explicitly?
  - From: Pan ruochen

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