[CMake] MinGW-w64/MSYS2 (or Cygwin) and NAG Fortran - how to combine?

[Arjen Markus]

Hi Alan,

> -----Original Message-----
> From: Alan W. Irwin [mailto:irwin at beluga.phys.uvic.ca]
> Sent: Thursday, February 08, 2018 10:59 PM
> To: Arjen Markus
> Cc: cmake at cmake.org
> Subject: Re: [CMake] MinGW-w64/MSYS2 (or Cygwin) and NAG Fortran - how to
> combine?
>
> On 2018-02-08 19:33-0000 Arjen Markus wrote:
>
> > So: Is it possible to instruct CMake to use the NAG-Fortran specific
> settings [for the Cygwin and MinGW-w64/MSYS2 platforms] and if so, how do I do
> that?
>
> Hi Arjen:
>
> I think you should be guided by what goes on for gfortran. For that compiler, the
> relevant Platform files are called CYGWIN-GNU-Fortran.cmake and Windows-
> GNU-Fortran.cmake Platform files for the Cygwin, and MinGW-w64/MSYS2
> platforms.  Furthermore, in all the existing nagfor cases (Linux and Darwin), you
> derive the nagfor-related name from the gfortran related name by replacing GNU-
> Fortran by NAG-Fortran. Therefore, I suggest you try the names CYGWIN-NAG-
> Fortran.cmake and Windows-NAG-Fortran.cmake for the two separate Platform
> files you are trying to create for the Cygwin and
> MinGW-w64/MSYS2 platforms.
>
I have a Platform file "Windows-NAG-Fortran.cmake" and that is used correctly if I start the NAG Fortran environment (using the MinGW Makefiles generator), but if I try the same with MinGWw-w64/MSYS2, this file is clearly ignored - I see the compiler fail on a typical GCC flag for creating shared libraries (the Platform file I added takes care of that in the NAG Fortran environment and therefore the build succeeds).

My guess is that the environment is determined in an early stage and then GNU/GCC has already been selected. But not all is lost - I realised that I may be able to get around this by expanding the PATH with the MinGW-w64/MSYS2 specific directories. I have not tried that yet.

Though I am still interested in other solutions ;).

Regards,

Arjen





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