[m-rev.] Refactoring make_temp

[Julien Fischer]

On Thu, 26 May 2016, Sebastian Godelet wrote:

> Hi Julien I have been able to compile your change on msys2/64 and
> re-compiled the compiler with that version, which worked well, Since
> you disabled the use of mkstemp for that platform, is there still
> anything else which is not working?

Ok, that's useful to know -- perhaps there's something broken with
my MinGW64 / MSYS2 installation.  My problem is that after installing
the source distribution I can't get the boostrap compiler to get
past configure's up-to-date test when recompiling itself.

Julien.