Re: identify unused functions?

["Bernd Jendrissek" <bernd jendrissek gmail com>]

On Tue, Apr 1, 2008 at 12:06 AM, Brian J. Tarricone <bjt23 cornell edu> wrote:
> G Hasse wrote:
>  > There is NO way to clerify all unused functions in a program.
>  > You could call functions by their addresses and those addresses
>  > could be calculated in runtime. So you don't know...
>
>  This is especially important in a gtk program where most (if not all)
>  signal callbacks will be passed to g_signal_connect() as a function
>  pointer, and will never be called directly.

However, if the functions are in a (private) library, then you can
find unused functions by subtracting the output of "objdump -R
$libdir/libfoo.so" (get dynamic relocations) from the list of defined
functions (see Stefan's nm --defined-only trick).  The difference is a
list of functions that aren't used by the library itself.