Re: [PATCH] Fix web/60933

[Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>]

Richard Biener <rguenther@suse.de> writes:

>> I'd strongly advise against it: in the past we've had serious problems
>> with versions newer than advertised in install.texi on some platforms.
>> Until we have positive evidence that specific newer versions work on a
>> wide range of platforms, we shouldn't suggest to our users that they
>> might.  Many users tried with the then-current versions in the past, and
>> the failures are often quite hard to trace back to this.
>
> Note that I explicitely added the reference to download_prerequesites
> for the case the user wants/needs to build the libraries together
> with GCC.  That should address this concern, no?

I fear it won't: some people will use it, others just download the
latest versions from gmp.org etc. and build them out-of-tree themselves.

If we want to recommend newer versions (and no complaint from me there),
we should first make sure they work *ourselves* and then again require
*those specific versions*, no weasle-wording for anything else, given
lots of bad experience in the past.

>> For the 4.9 branch, we should leave this as is: the benefit is almost
>> certainly not worth the trouble.
>
> Of course.  Though the version referenced from http://gcc.gnu.org/install
> is the one from trunk.

Unfortunately true.  Perhaps we should change that?

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University