[MITgcm-devel] genmake2 and makedepend

[Martin Losch]

Hi Jean-Michel,

you are right, the compilation still works, it just means that the corresponding files, e.g. mmc_file.f do not depend on netcdf.inc anymore, which one can probably live with.

I guess one can fix this by enlarging the default search for make depend, e.g. always add -I/usr/local/include (or the typical search paths of cpp) to the arguments of $(MAKEDEPEND). It's not very nice because the list is likely to expand, but should be safe, because the actual paths have been checked with the test in genmake2. What do you think?

Martin

On Dec 18, 2012, at 2:56 PM, Jean-Michel Campin <jmc at ocean.mit.edu> wrote:

> Hi Martin,
> 
> It happens manay times to me that "make depend" return some warning/error,
> but this does not prevent me to compile (with a successful "make").
> Are you in this situation ?
> 
> Otherwise, I find your suggestion little bit tricky, since it might
> prevent to use NetCDF in cases where it is available.
> My impression is that we should try to fix the makedepend step.
> 
> Cheers,
> Jean-Michel
> 
> On Tue, Dec 18, 2012 at 02:04:54PM +0100, Martin Losch wrote:
>> Hi there,
>> my version of Murphy's law: Whenever you want to show how great everything is, it turns against you and does not work.
>> 
>> I was trying to show to my group in a presentation, how makefiles are generated by genmake2 and how you compile the model etc, when "make depend" returned errors that it cannot find "netcdf.inc". This happened after the genmake_tnc.F test passed. I used darwin_amd64_gfortran with OS X 10.8 (mountain lion).
>> 
>> The problem is that (on my PowerBook), /usr/bin/cpp finds files in /usr/local/include by default, and gfortran finds libraries in /usr/local/lib by default (that's where my netcdf installation is), so that the test passes without problems (-DHAVE_NETCDF), and more importantly without INCLUDES or INCLUDEPATH being set (I have NETCDF_ROOT unset by default). However, when make depend tries to build the dependencies, the include files are no longer found because apparently, my makedepend (/opt/X11/bin/makedepend) does not search /usr/local/include by default.
>> 
>> I can easily fix this by specifying a proper NETCDF_ROOT (=/usr/local), but it shows that the netcdf test is not fool-proof. Do you have a suggestion how we can improve the test? E.g. tell cpp not to search anywhere that is not explicitly specified in the INCLUDEPATH?
>> 
>> Martin
>> 
>> 
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