gmp-bugs Digest, Vol 104, Issue 7

Jay K jay.krell at
Fri Oct 26 20:16:03 CEST 2012

These warnings aren't clearly harmless.
gmp is using very specific syntax to get very specific behavior,
and it is being ignored.

gcc builds all of gmp and then uses very little of it.

And then there is mpfr and mpc, which, granted, aren't very large.
We use gcc as a backend but we don't feed it any of the
"builtins" that it has mpfr and mpc to optimize. Granted, gmp isn't
just for "builtins", so it is more "needed". If you remove just a few
optimizations from gcc though, gmp isn't used then either.
I did that, and so can use the gcc backend without gmp, mpfr, mpc.

Anyway, I'm working on a new backend and very far along.
It is working but I'm making it better still.

 - Jay

> To: jay.krell at
> CC: gmp-bugs at
> Subject: Re: gmp-bugs Digest, Vol 104, Issue 7
> From: tg at
> Date: Fri, 26 Oct 2012 13:31:41 +0200
> Jay K <jay.krell at> writes:
>   "../../gmp-impl.h", line 3362: warning:  attribute "mode" is unknown, ignored
>   I've reported this before, [snip] Myself, I don't build gmp from
>   source any longer.
> I fully understand you.  Seeing these harmless warnings scrool past on
> the screen isn't worth it.  :-)
> -- 
> Torbjörn

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