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Re: patch for -Wno-long-long and early GNAT compilers
- From: Zack Weinberg <zack at codesourcery dot com>
- To: Robert Dewar <dewar at gnat dot com>
- Cc: gcc at gcc dot gnu dot org, kenner at vlsi1 dot ultra dot nyu dot edu, mrs at windriver dot com
- Date: Mon, 18 Mar 2002 20:41:32 -0800
- Subject: Re: patch for -Wno-long-long and early GNAT compilers
- References: <20020319040516.360ADF28CF@nile.gnat.com>
On Mon, Mar 18, 2002 at 11:05:16PM -0500, Robert Dewar wrote:
> <<There is still something I don't understand, though. You've said over
> and over that you can't devote resources to making the Ada front end
> portable. The implication is that it's too hard. My experience over
> in the C front end indicates just the opposite; we don't have trouble
> maintaining buildability with ancient broken pre-standard compilers,
> and simultaneously making use of modern constructs. Why is the Ada
> situation so different?
> >>
>
> Are you talking about restricting GNAT to standard Ada?
No, only maintaining compatibility with previous versions of GNAT. I
do see your point that making GNAT entirely standard Ada is not really
worth it given the expense and rarity of other Ada compilers.
(There *is* a reason why it would be desirable - to be able to verify
that GNAT-compiled-by-GNAT and GNAT-compiled-by-different-Ada generate
the same code for the same input. People do do this with the C
compiler occasionally.)
zw