[netCDF #PUN-322109]: nc-config issue when installing both shared and static libraries

Davide,

> Thanks for the quick answer. Unfortunately, this does not work properly
> for us:
> 
> $ ls -1 /glade/apps/opt/netcdf/4.2/intel/12.1.4/lib/
> libnetcdf.a
> libnetcdf_c++4.a
> libnetcdf_c++4.la
> libnetcdf_c++4.so
> libnetcdf_c++4.so.1
> libnetcdf_c++4.so.1.0.2
> libnetcdf_c++.a
> libnetcdf_c++.la
> libnetcdf_c++.so
> libnetcdf_c++.so.4
> libnetcdf_c++.so.4.2.0
> libnetcdff.a
> libnetcdff.la
> libnetcdff.so
> libnetcdff.so.5
> libnetcdff.so.5.3.1
> libnetcdf.la
> libnetcdf.so
> libnetcdf.so.7
> libnetcdf.so.7.2.0
> pkgconfig
> 
> $ ls -1 /glade/apps/opt/netcdf/4.2/intel/12.1.4/lib/pkgconfig/
> netcdf-cxx4.pc
> netcdf-fortran.pc
> netcdf.pc
> 
> $ echo $PKG_CONFIG_PATH
> /glade/apps/opt/netcdf/4.2/intel/12.1.4/lib/pkgconfig/
> 
> $ pkg-config --static --cflags --libs netcdf
> -I/glade/apps/opt/netcdf/4.2/intel/12.1.4/include
> -L/glade/apps/opt/netcdf/4.2/intel/12.1.4/lib -lnetcdf
> 
> $ nm /glade/apps/opt/netcdf/4.2/intel/12.1.4/lib/libnetcdf.a | grep hdf
> U nc4_rec_find_hdf_type
> 0000000000002a20 t read_hdf5_att
> libnetcdf4_la-nc4hdf.o:
> 0000000000002730 T nc4_get_hdf_typeid
> 00000000000005c0 T nc4_rec_find_hdf_type
> 0000000000002680 T nc4_get_hdf4_vara
> U nc4_get_hdf_typeid
> 
> Any insights in why this may be broken?

Checking more carefully, it looks like the "pkg-config --static --libs" solution
didn't work for me either, for the netCDF C library.  I got the same output
whether I used "--static" or not.  It did seem to work for the netCDF Fortran
library, however.

The suggestion to add a "--static" flag to nc-config was made some time ago, and
discussed on the netcdfgroup mailing list:

  
http://www.unidata.ucar.edu/mailing_lists/archives/netcdfgroup/2011/msg00315.html

but without resolution.

I think fixing this with pkg-config for the netCDF C library would require that 
HDF5 
ship with pkg-config support, which it doesn't currently.

I'm not sure what's needed to add a "--static-libs" flag to nc-config, but 
we'll look
into it when we can.  A temporary workaround would be to just modify the 
nc-config
shell script locally to support this functionality, though I know that's not a 
good
long-term solution ...

--Russ

> Thanks and Regards,
> Davide Del Vento,
> NCAR Computational & Information Services Laboratory
> Consulting Services Software Engineer
> http://www2.cisl.ucar.edu/uss/csg/
> 
> On 07/12/2013 02:03 PM, Unidata netCDF Support wrote:
> > Hi Davide,
> >
> >> We've installed netcdf in Yellowstone with both shared and static
> >> libraries. When querying nc-config for the libraries, one gets what 
> >> follows:
> >>
> >> $ nc-config --libs
> >> -L/glade/apps/opt/netcdf/4.2/gnu/4.7.2/lib -lnetcdf
> >>
> >>
> >> Which is perfectly fine for an user compiling programs against the
> >> shared library (our RPATH takes care of the HDF5 dependency). However,
> >> if the user is compiling statically, this output is incomplete: it let
> >> them resolve the static archive which we installed in the same
> >> directory, but it does not let them resolve the HDF5 dependencies.
> >>
> >> I believe a --static-libs or something of that flavor should be added to
> >> nc-config to cover this use case, but maybe there is already a way.
> >> Please advice.
> >
> > We distribute recent versions of the netCDF C and Fortran libraries
> > with support for "pkg-config", which is a general version of
> > package-specific scripts like nc-config and nf-config that outputs
> > information for shared libraries by default, but can optionally output
> > library information suitable for static linking.
> >
> > You would use pkg-config much like nc-config, to help compile and link
> > an application, for example:
> >
> >    $ export PKG_CONFIG_PATH=/opt/lib/pkgconfig
> >    $ gcc -o test test.c $(pkg-config --libs --cflags netcdf)
> >
> > Note: "cflags" here means "compiler flags" not "C flags", so you could
> > use the same command for gfortran as gcc:
> >
> >    $ gfortran -o test test.c $(pkg-config --libs --cflags netcdf-fortran)
> >
> > You may want to check if you have the pkg-config command installed and
> > look at the documentation to make sure it supports the --static
> > option.
> >
> > Here's examples of the output of pkg-config with and without --static
> > on my platform, resulting from a standard "sudo make install":
> >
> >    $ pkg-config --cflags --libs netcdf
> >    -I/usr/local/include  -L/usr/local/lib 
> > -L/machine/russ/installs/hdf5_1811/lib -L/opt/lib -lnetcdf -lhdf5_hl -lhdf5 
> > -lm -lz -lcurl
> >    $ pkg-config --static --cflags --libs netcdf
> >    -I/usr/local/include  -L/usr/local/lib 
> > -L/machine/russ/installs/hdf5_1811/lib -L/opt/lib -lnetcdf -lhdf5_hl -lhdf5 
> > -lm -lz -lcurl
> >    you have mail in /var/spool/mail/russ
> >    $ pkg-config --cflags --libs netcdf-fortran
> >    -I/usr/local/include  -L/usr/local/lib -lnetcdff
> >    $ pkg-config --static --cflags --libs netcdf-fortran
> >    -I/usr/local/include  -L/usr/local/lib 
> > -L/machine/russ/installs/hdf5_1811/lib -L/opt/lib -lnetcdff -lnetcdf 
> > -lhdf5_hl -lhdf5 -lm -lz -lcurl
> >
> > --Russ
> >
> >> Regards,
> >> Davide Del Vento,
> >> NCAR Computational & Information Services Laboratory
> >> Consulting Services Software Engineer
> >> http://www2.cisl.ucar.edu/uss/csg/
> >> SEA Chair http://sea.ucar.edu/
> >>
> >>
> > Russ Rew                                         UCAR Unidata Program
> > address@hidden                      http://www.unidata.ucar.edu
> >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: PUN-322109
> > Department: Support netCDF
> > Priority: Normal
> > Status: Closed
> >
> 
> 
Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: PUN-322109
Department: Support netCDF
Priority: Normal
Status: Closed