On 09/22/16 19:26, Martin Sebor wrote:
> On 04/27/2016 09:47 AM, Bernd Edlinger wrote:
>> Yes, when they are pre-installed there should be no problem.
>> Also newer versions than these seem to work.
>> In-tree only the versions that download_prerequisite picks are
>> tested and guaranteed to work.
> I was made aware today that my recent patch for pr49905 broke
> bootstrap with MPFR 2.4:
>    https://gcc.gnu.org/ml/gcc-patches/2016-09/msg01507.html
> In light of this risk and given that the recommended MPFR version
> is still 2.4 I wonder if the download_prerequisites script shouldn't
> instead download the minimum supported version.  That way those of
> us working with MPFR but not intimately familiar with its version
> specific details would have an easier way of avoiding such breakage.
> Alternatively, perhaps the script could be extended to make it
> possible to choose between the most recent and the recommended
> versions of the prerequisites that GCC is intended to work with,
> and people who make use of either in their code encouraged to
> test with both.
> Martin

There is no feasible way how to make all gmp/mpfr/mpc versions from
minimal to latest build for all targets and all possible

I hope that we do not "recommend" these versions.

They are only the minimum versions for pre-installed packages.


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