[CMake] Fortran MinGW on Windows

[Leek, Jim]

Oh, if there any cmake way to get the fortran link flags I need to pass to g++? I know -lgfortran is all I need in this case, but if there was a generic way to get cmake to figure it out for me, that would be nice.

----- Original Message -----
From: Arjen Markus [mailto:arjen.markus at deltares.nl]
Sent: Friday, May 31, 2013 01:03 AM
To: Leek, Jim; cmake at cmake.org <cmake at cmake.org>
Subject: Re: [CMake] Fortran MinGW on Windows

Hi Jim,

I do not quite know why this works fine on Linux, but the
issue is caused by the C++ part of the link step. As you
are using g++ to link all the C++ runtime libraries, you
need to tell it what Fortran runtime libraries to add.
Linking with gfortran automatically ensures all these
libraries are taken into account. (If you were to use
gfortran as the interface to the linker, then you would
need to tell it what C++ runtime libraries are required.)

A way out would be to build these additional libraries as
DLLs (shared objects), as then the language-specific
linker can be used.

Regards,

Arjen

On Fri, 31 May 2013 07:51:34 +0000
  "Leek, Jim" <leek2 at llnl.gov> wrote:
> Hi, I recently rebuilt an old build system with cmake. 
> It works well on Linux, but part of the idea of using 
>cmake was to make it more portable.  Now I'm working on 
>the Windows port, but I'm having issues with the Fortran 
>libraries.  The program itself is C++, but it has a 
>number of optional third party libraries, a few of which 
>are written in Fortran.  The weird thing is, when I do 
>the final link, I get a bunch of "undefined references" 
>for stuff that's in the gfortran library.
> 
...
> 
> Thanks,
> Jim


 

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