Re: [RFC] Force build error on undefined symbols

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Sat, Apr 10, 2004 at 07:28:27PM +0200, Sam Ravnborg wrote:
> How does output from your nm look?
> My version (GNU nm 2.14.90.0.5 20030722 (SuSE Linux)) looks like this:
> c04e56ac B zone_table
> 
> So I assume an undefined symbol would look like this:
> 00000000 U undef_symbol

No, because an undefined symbol does not have an address associated with
it.  So, it looks like this:

         U symbol

More than one blank space at the beginning, U, then one space and the
symbol.  On binutils built on 32-bit architectures, 9 spaces prefixing
the 'U'.  On 64-bit architectures, 17 spaces prefixing the 'U'.

(Yes, even a cross-built binutils building for a 32-bit architecture
on a 64-bit architecture gives you 64-bit addresses.)

Does the format _really_ matter this much?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core