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

[Andy Moreton]

On Wed 27 Sep 2017, Glenn Morris wrote:

> Vincent Belaïche wrote:
>
>> There is no such thing as a mingw64_shell.bat script, but there is a
>> msys2_shell.cmd script, which one can launch with the -mingw64 for
>> MSYSTEM to be set accordingly to MSYSTEM=MINGW64.
>
> Sounds like MinGW has changed how things work and the instructions in
> nt/INSTALL.W64 need updating.
>
>> checking the compiler's target... x86_64-pc-msys
>> configure: error: Emacs does not support 'x86_64-pc-msys' systems.
>
> This is MinGW-specific code added in https://debbugs.gnu.org/19111


Newer MSYS2 installations have mingw32.exe, mingw64.exe and msys2.exe for 
launching a
shell for each of the build environments, which are more convenient for
creating desktop shortcuts. Either of the first two can be used to build
emacs, if the appropriate toolchain is installed.

    AndyM