Re: How to configure gdb to support '--arch=i386' on Mac OS X

[Tristan Gingold <gingold@adacore.com>]

On Oct 7, 2009, at 11:22 PM, Stan Shebs wrote:

> Michael Snyder wrote:
>> Yeahhhh, this isn't going to work.
>>
>> Your binary is in... I forget what it's called -- oh, "mach-o"  
>> format.
>> Our (fsf) gdb does not know how to read that file format.  And it
>> would be a huge job to port over the changes in apple gdb that tell
>> it how to read mach-o files (besides the fact that they are "fat"
>> files, or at least potentially might be). m
> The Mach-O part does work in 7.0, thanks to Tristan and AdaCore  
> (check out gdb/machoread.c).  I don't think fatness-handling is  
> there, although at the Xcode level one has to specifically ask for  
> fat builds anyway, so one could avoid that particular obstacle and  
> thus be well-positioned to smack one's face into the next wall. :-)

Right.  The work-around is not to build fat binaries.

Current FSF gdb can't handle fat executable.  I am not sure that we  
want to implement this, but feel free
to ask.  However gdb handles fat objects such as dylibs.

Tristan.