From: Ben Peddell <killer DOT lightspeed AT bigpond DOT com>
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Subject: Re: Bug 00314 -- div() still broken
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Date: Sun, 27 Apr 2003 15:41:14 +1000
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To: djgpp AT delorie DOT com
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Eric Rudd wrote:
> Ben Peddell wrote:
> 
>> Obviously, some sort of optimization puts the div_t structure in 
>> %edx:%eax instead of 16(%ebp). It would be a good optimization if it 
>> didn't break the libraries. 
> 
> 
> Yes, indeed.  So, it looks as if there is a gcc bug here.  Where are the 
> calling conventions documented?  I couldn't find them in the gcc.ixx 
> docs.  I think I ought to isolate this and submit a bug report, if gcc 
> is indeed at fault.  I suppose a workaround would be to recompile libc, 
> but then one wonders whether all the other libraries are also broken.
> 
> -Eric Rudd
> rudd AT cyberoptics DOT com
> 

OK. GCC 3.2.1 has -fpcc-struct-return by default in DJGPP, whilst GCC 
3.2.2 has -freg-struct-return by default in DJGPP.
GCC 3.2.2 may need to be configured to make -fpcc-struct-return the 
default, to maintain compatibility with the DJGPP 2.03 libraries. Or, 
the libraries may need to be re-compiled for GCC 3.2.2, and marked as such.

These options are in `info gcc "Invoking GCC" "Code Gen Options"'