Possible problem with mpfr sources built in-tree which attempt to "auto patch" ?

[Jonathan Wakely]

On 4 November 2016 at 22:51, Dennis Clarke wrote:
>
> So should the userid that is performing the build inside the separate
> build directory be allowed to modify the contents inside the source tree
> directory ?

GCC doesn't modify its sources, but if MPFR does then there's not much
we can do about it.