[CMake] Bad flags being passed to NAG Fortran compiler

[Petr Kmoch]

Hi Neil.

I can only answer your question 3: there are variables like
CMAKE_Fortran_COMPILER and CMAKE_Fortran_COMPILER_ID which you could
use for this purpose. They're documented as CMAKE_<LANG>_COMPILER etc.
under "Variables for Languages".

Petr

On Mon, Feb 18, 2013 at 1:13 AM, Neil Carlson <neil.n.carlson at gmail.com> wrote:
> When building a shared library using the NAG Fortran compiler, cmake is
> invoking
> the compiler with the "-fPIC" option.  This is wrong.  The correct option is
> "-PIC".
> I've found I can get things to work if I add the following two lines to my
> CMakeLists.txt
> file (probably not the right way to fix things):
>
> set(CMAKE_Fortran_COMPILE_OPTIONS_PIC "-PIC")
> set(CMAKE_SHARED_LIBRARY_Fortran_FLAGS "-PIC")
>
> Several questions (I'm *very* new to cmake, so apologies if they're stupid):
> 1)  I've found the file Modules/Platform/Linux-NAG-Fortran.cmake.  Is that
> where
>     compiler-specific settings like this belong?   And are the above two
> lines the
>     correct thing to add to that file?
> 2) Is there a maintainer for the Fortran (esp. NAG) related module files?  I
> suspect
>     that there are other areas where cmake will not drive the NAG compiler
> correctly.
> 3) Until this is fixed in cmake, I need to find a robust way of making this
> work.  the
>     problem with what I did above is that I only want to set the variables
> if I'm using
>     the NAG compiler.  Is there some cmake variable available that gives the
> identity
>     of the Fortran compiler it identified against which I can test?  Or can
> my code
>     distribution include a "fixed" version of Linux-NAG-Fortran.cmake
> (assuming it's the
>     culprit) that somehow gets used instead?  What are the standard
> strategies
>     in cases like this?
>
> Thanks for your help!
>
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