re: port-sparc64/46652 (sparc ofwboot.net fails to loadkernelviatftp)

[matthew green <mrg%eterna.com.au@localhost>]

The following reply was made to PR port-sparc64/46652; it has been noted by 
GNATS.

From: matthew green <mrg%eterna.com.au@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: tsutsui%NetBSD.org@localhost, gnats-admin%netbsd.org@localhost, 
netbsd-bugs%netbsd.org@localhost,
    spz%NetBSD.org@localhost
Subject: re: port-sparc64/46652 (sparc ofwboot.net fails to loadkernelviatftp)
Date: Mon, 16 Jul 2012 05:27:36 +1000

 >  > I notice old gcc 4.1.3 complained about (int **) with WARNS=2:
 >  > ---
 >  > cc1: warnings being treated as errors
 >  > /usr/src/sys/arch/sparc/stand/ofwboot/ofdev.c: In function 'devopen':
 >  > /usr/src/sys/arch/sparc/stand/ofwboot/ofdev.c:539: warning: dereferencing 
 > type-punned pointer will break strict-aliasing rules
 >  > ---
 >  > (probably that was the reason I changed it)
 >  > 
 >  > gcc 4.5.3 doesn't warn it so is it okay to assume it was a false alarm?
 >  
 >  gcc 4.5 seems to be smarter about it.
 >  putting an int * into a location an int ** points to shouldn't cause grief 
 > :)
 >  
 >  I would assume that the danger of someone building Sparc bootblocks on a
 >  Vax is pretty low, too.
 
 if necessary, i'd put a gcc 4.1-only Makefile conditional to disable
 this warning or feature.
 
 
 .mrg.