bug#28601: 26.0.50; configure: error: Emacs does not support 'x86_64-pc-msys' systems.

[Andy Moreton <andrewjmoreton@gmail.com>]

On Fri 13 Oct 2017, Eli Zaretskii wrote:

>> From: Noam Postavsky <npostavs@users.sourceforge.net>
>> Date: Thu, 12 Oct 2017 19:06:56 -0400
>> Cc: Andy Moreton <andrewjmoreton@gmail.com>, 28601@debbugs.gnu.org, 
>> 	Vincent Belaïche <vincent.belaiche@gmail.com>
>> 
>> -First we need to switch to the MinGW-w64 environment.  Exit the MSYS2 BASH
>> -console and run mingw64_shell.bat in the C:\msys64 folder, then cd back to
>> +First we need to switch to the MinGW-w64 environment.  Exit the MSYS2
>> +BASH console and run mingw64.exe in the C:\msys64 folder (if it's
>> +missing, install it with 'pacman -S msys2-launcher'), then cd back to
>>  your Emacs source directory, e.g.:
>
> Can we rely on all the users to have the latest MSYS2?  If not,
> perhaps after your description we should say something like "If you
> don't have mingw64.exe, but do have mingw64_shell.bat, then ..."?

MSYS2 is a rolling-release distribution, so any user who does not have
an up to date installation would be well advised to update to current
package versions before attempting to build emacs.

    AndyM