[OpenAFS-devel] symbol _error_message conflict on 10.3

[Dave Botsch]

I'm not sure it's an issue under 10.4 with the conflicts.

As far as 10.3...

supposedly the two linker flags you mention are the default for 10.3 and up
(but I had tried putting them in there as other linker options, anyway), and
still the multiple symbol definition gives an error and not a warning.

I'm looking back at the man page again for anything else and did find the -m
option, though, the man page seems to be wrong about how to use this option.

On Tue, Feb 20, 2007 at 04:56:49PM -0500, Marcus Watts wrote:
> ...
> > what's more interesting is that under 10.4, stuff builds. It appears that using
> > the 10.4SDK, xcode is able to do its two level namespace trick and just gives
> > an ld warning that that symbol is there multiple times.
> > 
> > Under 10.3SDK, however, (even when building on a 10.4 box), it seems that this
> > doesn't work, even if I specify the twolevel namespace linker option. So,
> > something is different under 10.3, but what? Could it have something to do w.
> > the way the afs libs or the kerberos framework is built under 10.3?
> ...
> 
> sure, it's possible.
> 	man ld
> describes these:
> 	env LD_TWOLEVEL_NAMESPACE=1
> 	-twolevel_namespace
> 	-multiply_defined warning
> which will certainly modify that "two level namespace trick" so probably
> affect the results.  There looks to be quite a few more related ld
> options as well, which might possibly affect how libraries are built (and
> hence explain the behavior you are seeing).  'otool' is at least capable
> of printing the two-level namespace hints.
> 
> There's a pretty good chance that the object you built under 10.4 isn't
> completely healthy.  Most likely, one set or the other of error messages
> won't be visible - which set is visible may depend on which namespace
> was visible to the routine calling error_message().  This may not
> matter greatly to you - if you are getting link errors mainly or only
> on of aklog, then you may not care because the distribution versions of
> aklog don't usually try to lookup kerberos errors.
> 
> 				-Marcus Watts
> 

-- 
********************************
David William Botsch
Programmer/Analyst
CNF Computing
botsch@cnf.cornell.edu
********************************