[MITgcm-support] help with netcdf

[samar khatiwala]

Hi Baylor

I don't have g77 installed. Everything is compiled with gcc/xlf. And yes,
it is almost certainly a problem with leading/trailing underscores and
calling fortran from C and vice versa. This is a constant hastle.
xlf provides you with the -qextname flag to deal with this. Problem is, my
mpi source is compiled with -qextname (because I prefer it that way)
and the netcdf code is compiled without it (again because doing otherwise
would break a lot of other code). Anyway, I'll sort it out. ugh.

Samar

On Tue, 26 Apr 2005, Baylor Fox-Kemper wrote:

> Hi Samar,
> When you compile netcdf with the fortran wrapper routines, you want
> FC=xlf, not FC=g77.  If you use FC=g77, it will change the names of the
> fortran wrappers to have things like _nf_save instead of nf_save (These
> are probably only correct in spirit).  When xlf compiles the MITgcm, it
> will try to link to a subroutine called nf_save, but if you compiled
> with g77, you will only have a precompiled library subroutine called
> _nf_save, so it will fail.  I found it easiest to compile the netcdf
> libraries with gcc/xlf instead of gcc/g77, which eliminates a lot of
> hassle.
>
> It is also possible that you didn't compile the fortran wrapper
> routines when you compiled netcdf, in which case the linker will
> certainly fail...
>    Cheers,
>      -Baylor
>
> On Apr 26, 2005, at 12:11 PM, samar khatiwala wrote:
>
> > Baylor, I don't follow. I'm using Mac OS X with gcc/xlf. I have no
> > trouble
> > compiling the netcdf libraries and can use them with other code. Where
> > does intel come into the picture?
> >
> > Thanks, Samar
> >
> > On Tue, 26 Apr 2005, Baylor Fox-Kemper wrote:
> >
> >> Hi Samar,
> >>    I had to compile netcdf myself with the intel compiler to get it to
> >> work with the intel-compiled mitgcm.  There is a name-mangling problem
> >> otherwise.
> >>    Cheers,
> >>      -Baylor
> >>
> >> On Apr 26, 2005, at 11:54 AM, samar khatiwala wrote:
> >>
> >>> Hi Ed
> >>>
> >>> Could you please help me sort out a netcdf problem? I cannot get the
> >>> MNC
> >>> package to work. This is on a dual G5 with a working netcdf
> >>> installation.
> >>> I get:
> >>>
> >>> *********************************************************************
> >>> WARNING: the "mnc" package was enabled but tests failed to compile
> >>>   NetCDF applications.  Please check that:
> >>>
> >>>   1) NetCDF is correctly installed for this compiler and
> >>>   2) the LIBS variable (within the "optfile") specifies the correct
> >>>        NetCDF library to link against.
> >>>
> >>>   Due to this failure, the "mnc" package is now DISABLED.
> >>> *********************************************************************
> >>>
> >>> Any hints what could be wrong? Can I get genmake2 to spit out more
> >>> debug
> >>> info? Optfile is below.
> >>>
> >>> Thanks, samar
> >>>
> >>> FC='mpif77'
> >>> CC='mpicc'
> >>> INCLUDES='-I/usr/local/lam/include -I/usr/local/netcdf/include'
> >>> LIBS='-L/usr/local/netcdf/lib -lnetcdf'
> >>> LN='/bin/ln -s'
> >>> CPP='/usr/bin/cpp -traditional -P -xassembler-with-cpp'
> >>> LINK=$FC
> >>> FFLAGS='-qfixed=132 -qextname -qsave=all'
> >>> FOPTIM='-O3'
> >>> NOOPTFLAGS='-O0'
> >>>
> >>> S64='$(TOOLSDIR)/set64bitConst.sh'
> >>> #MAKEDEPEND='${TOOLSDIR}/xmakedepend'
> >>> #MAKEDEPEND=makedepend
> >>> DEFINES='-DWORDLENGTH=4'
> >>> # -DNML_TERMINATOR=" /"'
> >>> MAKEDEPEND='/usr/X11R6/bin/makedepend'
> >>>
> >>>
> >>> _______________________________________________
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> >>> http://mitgcm.org/mailman/listinfo/mitgcm-support
> >>
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