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From: RazorSliph <sliph AT gmx DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: -fpack-struct issues
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References: <6kvo4ukaf4ceud3gn6pp0ut7t08jsup0kv AT 4ax DOT com> <3405-Tue22Jan2002091904+0200-eliz AT is DOT elta DOT co DOT il>
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Date: Tue, 22 Jan 2002 09:48:35 -0500
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To: djgpp AT delorie DOT com
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On Tue, 22 Jan 2002 09:19:05 +0200, "Eli Zaretskii"
<eliz AT is DOT elta DOT co DOT il> wrote:

>> From: RazorSliph <sliph AT gmx DOT net>
>> Newsgroups: comp.os.msdos.djgpp
>> Date: Mon, 21 Jan 2002 15:57:26 -0500
>> 
>> Greetings! I need to compile an application using the -fpack-struct so
>> that the structures generated (and written to disk) are identical to
>> the saved structures created by another program.  The structures,
>> unfortunately, are 10 bytes wide, and get padded to 12 bytes with a
>> base compile.
>
>See section 22.11 of the DJGPP FAQ list, it explains the issues
>involved and suggests several possible solutions.
>
>> However, whenever I compile with the -fpack-struct option, the
>> resulting executable segfaults. (GPF's)
>
>That's expected, since you include headers which define structures
>used by C++ library functions, and those library functions were not
>compiled with -fpack-struct.  So you introduced an incompatibility
>between the library and your program.  This is also exlpained in the
>FAQ.
>
>In general, I find -fpack-struct to have too many limitations to be
>of practical use for what you want to do.  Use one of the other
>methods described in the FAQ.

Thanks!
Heh - I can't believe that I didn't RTFM...