[Scons-users] Does SCons work correctly for fortran submodules?

[Peter Diener]

Hi Bill,

I first saw it with an earlier version of SCons. I don't remember which 
one. Before reporting I wanted to check if it was a bug that was already 
fixed, so I got the development version. I can try it with the release 
version as well.

scons --tree=prune

does not give me any additional information. It gives exactly the same 
output as just scons.

Cheers,

   Peter

On Friday 2018-04-27 14:46, Bill Deegan wrote:

>Date: Fri, 27 Apr 2018 14:46:35
>From: Bill Deegan <bill at baddogconsulting.com>
>Reply-To: SCons users mailing list <scons-users at scons.org>
>To: SCons users mailing list <scons-users at scons.org>
>Subject: Re: [Scons-users] Does SCons work correctly for fortran submodules?
>
>Peter,
>
>Any reason you're using the development version of SCons instead of the
>released version 3.0.1?
>
>What does scons --tree=prune show you?
>
>-Bill
>
>On Fri, Apr 27, 2018 at 12:04 PM, Peter Diener <diener at cct.lsu.edu> wrote:
>      Hi,
>
>      Is SCons supposed to work for fortran codes that use submodules
>      and type bound procedures? I have a code project that relies
>      heavily on
>      those features and I would really like to use SCons for it. I
>      was able
>      to produce a small example code that demonstrates the problem I
>      encounter (it only appears with more than one submodule) that I
>      have
>      attached along with the SConstruct file I use.
>
>      The code example consists of two modules, each containing a
>      fortran type with 2 type bound procedures ( a set and get for an
>      integer value). In the module itself the type and the interface
>      to the procedures are defined while the actual implementation of
>      the procedures are done in the submodules. Normally I would keep
>      the module and corresponding submodule in different files to
>      separate the interface and implementations.
>
>      When I run scons on this example, I get:
>
>      scons: Reading SConscript files ...
>
>      scons: *** Multiple ways to build the same target were specified
>      for: function.mod  (from ['test_1.f90'] and from ['test_2.f90'])
>
>      Is my SConstruct file incorrect, should I not expect SCons to be
>      able to handle such a case or is this a bug?
>
>      My SCons is an up to date checkout of the GitHub repository,
>      i.e.
>
>      scons --version
>
>      gives:
>
>      SCons by Steven Knight et al.:
>              script:
>      v3.1.0.alpha.yyyymmdd.867f762f6c1e23524cd1b0262b8e93e822b23d0c
>
>      Note, the example code compiles correctly with a sufficiently
>      new version of gfortran and the command line:
>
>      gfortran test_1.f90 test_2.f90 test_submodules.f90 -o
>      test_submodules.x
>
>      Thank you in advance for any advice.
>
>      Cheers,
>
>        Peter Diener
>
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