Re: GNU gcc library function checksum

[Nick Clifton <nickc at redhat dot com>]

Hi Duncan,

> For the purposes of identifying changes in object code (library functions received 
> as object code) I would like to calculate a checksum value of individual object 
> files and / or each function within a library (archive). Are there 
any options I can
> use with objdump to do this

No.

> or are there any other tools that will enable me to compute the checksums?

You can compute checksums of entire object files by just extracting them 
and passing them to some external program.  eg:

  #!/bin/bash

  LIB=libbfd.a

  for A in `ar t $LIB`
  do
    ar x $LIB $A
    echo "checksum: " `md5sum --binary $A`
    rm $A
  done

There is no simple equivalent for doing the same on a per-function 
basis, though, sorry.  You would have to write a program to do this.

Cheers
  Nick