From:	"Ed Manlove" <emanlove AT ieee DOT org>
Newsgroups:	comp.os.msdos.djgpp
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Subject:	Re: System headers for DJGPP hosted cross compiler
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Date:	Thu, 12 Dec 2002 08:20:29 -0500
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Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de> wrote in message
news:at4jd0$4as$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE...
> Ed Manlove <emanlove AT ieee DOT org> wrote:
>
> > It sounds as if you are suggesting using the GNU gcc source code and not
> > what I call the DJGPP gcc source code.
>
> Not really.  What I wanted to suggest is that you'll have to go even
> further, making additional modifications to the sources, similar to
> those that take the GNU version to the DJGPP version.  You need sort
> of an "even more DJGPP" gcc source tree.  The underlying issue being
> that I don't think those parts of the source tree not used as part of
> a native build are likely to have been adapted to DJGPP, ever.  So
> you'll have to do that.
>
> I haven't looked at the way the DJGPP source code is currently
distributed,
> but at least at some point, you had three possibilities:
>
> 1) get only those sources needed to build the DJGPP native toolchain
> 2) get the full sources, already modified so the DJGPP native build works
> 3) get the original GNU sources, and a set of patch files and instructions
>    that will turn them into the DJGPP version
>
> You'll almost certainly have to inspect those patches used in variant 3)
> closely, and carefully check if any similar modifications are necessary in
> those parts of the build process that the native build doesn't use.
>
> If all else fails, you may even have to consider a "canadian cross"
> build, ie. build GCC on Linux or wherever, with DJGPP as the host
> system and your actual target platform as the target.
>
> > use the DJGPP source code.  I am really hoping to use this code branch.
And
> > configure/build instructions are fairly similar.
>
> "Fairly similar" is not enough.  Every tiny difference is there for a
> reason, which you will have to understand and possibly extrapolate
> into new, as yet unused areas of the code tree.
>
> Either way, it's not the "instructions" that you'll have to check as
> much as the actual scripts ('configure', and whatever others it calls)
> and configuration files.
> --
> Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)

This is is good news and the direction to check the patches is helpful.  I
am looking throught it now.  Thanks for the help.

Ed

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