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Re: problems linking formats.
- To: iverson at cisco dot com
- Subject: Re: problems linking formats.
- From: Kim Knuttila <krk at cygnus dot com>
- Date: Tue, 25 Mar 1997 19:36:29 -0800
- CC: Charles_Boatwright at cisnc dot canon dot com, gnu-win32 at cygnus dot com
- Reply-to: krk at cygnus dot com
From: Tim Iverson <iverson@cisco.com>
Date: Mon, 24 Mar 1997 17:54:39 -0800 (PST)
Cc: gnu-win32@cygnus.com
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I'm unsure about the latest MSVC, but I do know that MSC, Borland, etc.
(all older Windows/DOS compilers) use Intel OMF, not "pe-i386", which I
believe is an executable format, not an object format. According to the
Cygnus GCC-b17.1 source, pe-i386 assumes that the object module format is
actually a variation on COFF.
MSC did at one time support SCO's variation on COFF, which may be similar
enough to what GCC uses such that MSVC's link.exe will link without error
messages, but use incorrect offsets. I have seen the incorrect offsets
problem with GCC-b17.1 and Phar-Lap's linker, which does support COFF. So,
I'm inclined to believe that pe-i386 is not COFF enough to be useful
outside of GCC.
IMHO, if Cygnus wants a drop-in replacement for a production toolset, they
will need to support OMF at some point. However, given that GNU doesn't
support it, using a bastard COFF during beta does provide a workable
solution until OMF support is ready.
I do wish it was better documented, though. I looked all over the README's
and FAQs and saw nary a reference to executable or object format; "pe-i386"
does somewhat imply "Microsoft Portable Executable" format, often referred
to as "PE", but it would be nice if it was explicitly stated.
Tim,
You're missing some info. The 'pe' does refer to "Portable Executable". This
is Microsoft's extension to COFF and it is the official format for Windows/NT.
(There's tons of info on the MS Developer CD's, etc) Far from a 'bastard COFF',
you can think of PE as the replacement for OMF. There are PE formats defined
for i386, powerpc, alpha and mips (and probably others by now).
--krk
--
Kim Knuttila | Speaking for himself as always.
Cygnus Solutions | Woof.
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