Help getting HelloMeshF77.F to run on GRUMMP

[Mark Miller]

Hi All,

Ok, got HelloMeshF77.F working against GRUMMP.

I did NOT need 4.3 gcc. I used gcc-3.2.3. %VAL() has been part of
Fortran interface to gcc for 'simple' types for quite a while I guess.

I turns out the GRUMMP implementation was taking the name of the file as
passed from fortran and just using it like a null terminated string. I
added code to null terminate the string and HelloMeshF77.F now works.

So, I learned something. I do think we need to test the Fortran
interface. I think Tim suggested last week that linking alone may not be
a sufficient test and we might want to ensure we at least test those
calls that pass string valued stuff. And, this experience bears out that
concern.

Mark

On Tue, 2009-11-03 at 14:25 -0600, Tim Tautges wrote:
> 
> You're only partly correct there.  First, I don't think g77 is going to work for you at all, you should be using 
> gfortran.  Second, you'll need the 4.3 series of gcc, because it was only with that version that gfortran supported call 
> by value.  Third, you don't need to link with g++, as long as the linker you are calling is told the correct libraries 
> to link in.  In MOAB, we accomplish this by putting those extra library link parts in a make variable which can be used 
> by applications.  I don't remember, but I think they may be appended to IMESH_LIBS.
> 
> > Finally, I cannot get HelloMeshF77 to run successfully. GRUMMP is always
> > trying to add '.vmesh' to the filename. That is fine, but try as I
> > might, no matter what I do, iMesh_load() winds up getting some scrambled
> > name.
> > 
> 
> That's a GRUMMP issue, I suspect.
> 
> - tim
> 
> > Mark
> > 
> > 
> > 
> 
-- 
Mark C. Miller, Lawrence Livermore National Laboratory
email: mailto:miller86 at llnl.gov
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