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[netCDF #FVK-122895]: Problem with installing netCDF.

> Hi Russ,
> 
> I have successfully installed both C and Fortran libraries on my Mac, and on 
> this website 
> http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-fortran-install.html
> it says
> 
> Now you will only need to use something like
> 
> -L{DIR1}/lib -lnetcdff
> 
> 
> to link Fortran software with the installed netCDF Fortran and C libraries.
> 
> But it returns
> 
> bash-3.2$ -L/usr/local/lib -lnetcdff
> bash: -L/usr/local/lib: No such file or directory
> 
> Is this linking step necessary? How do I do this right?

If you have a Fortran program that calls netCDF functions, for example the
sample program simple_xy_wr.f90 here:

  http://www.unidata.ucar.edu/netcdf/examples/programs/simple_xy_wr.f90

You should be able to compile and link it like this:

  gfortran -I/usr/local/include simple_xy_wr.f90 -o simple_xy_wr 
-L/usr/local/lib -lnetcdff

where the -I option tells gfortran where to look for the netcdf.mod file and 
the -L
option specifies where the library will be found.

You can also use the "nf-config" program installed in /usr/local/bin for this 
purpose
with something that uses the nf-config program to provide the necessary -I and 
-L
options, like this:

  gfortran simple_xy_wr.f90 -o simple_xy_wr `nf-config --fflags --flibs`

(Note the use of back-quotes "`" rather than quotes "'".)

Either way, you should end up with an executable program "simple_xy_wr".  If 
you try
invoking it and it still can't find libraries, try putting the library 
directory in
the environment variable DYLD_LIBRARY_PATH, as in

  export DYLD_LIBRARY_PATH=/usr/local/lib 
  ./simple_xy_wr

There are ways to avoid using the DYLD_LIBRARY_PATH environment variable which 
were
displayed at the end of the output from "make install".

--Russ

> On Mar 25, 2013, at 9:50 PM, Unidata netCDF Support 
> <address@hidden<mailto:address@hidden>>
> wrote:
> 
> Please find the config.log attached.
> 
> Thank you very much!
> Yanshi.
> 
> OK, here are the relevant lines from config.log:
> 
> configure:17833: gfortran -g -O2 -c conftestf.f
> configure:17836: $? = 0
> configure:17839: gfortran -o conftest -g -O2  conftestf.o conftest.o
> ld: warning: ignoring file conftest.o, file was built for unsupported file 
> format ( 0xcf 0xfa 0xed 0xfe 0x 7 0x 0 0x 0 0x 1 0x 3 0x 0 0x 0 0x 0 0x 1 0x 
> 0 0x 0 0x 0 )  which is not the architecture being linked (i386): conftest.o
> Undefined symbols for architecture i386:
> "_sub_", referenced from:
> _MAIN__ in conftestf.o
> ld: symbol(s) not found for architecture i386
> 
> Your gfortran is compiling for i386, a 32-bit architecture, but your gcc is
> apparently compiling for a different architecture, probably 64-bit x86_64.
> You have to use the same architecture if you want to link the software 
> together.
> You could do this by either using the right flags for gcc, for example -m32 or
> maybe -arch i386, or use a flag for gfortran, maybe -m64 or -arch x86_64.  If
> you installed netcdf-fortran from MacPorts, you may have a gfortran that 
> produces
> 64-bit objects with a long name something like
> /opt/local/bin/x86_64-apple-darwin-gfortran-mp-4.7
> but it might be easier to just use the gfortran you have and make gcc produce
> 32-bit objects.
> 
> --Russ
> 
> On Mar 25, 2013, at 4:57 PM, Unidata netCDF Support 
> <address@hidden<mailto:address@hidden>>
> wrote:
> 
> Hi Russ,
> 
> I don't have problem installing C library with --disable-netcdf-4. And I 
> followed instructions at
> http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-fortran-install.html
> 
> But still I get error for './configure --prefix=/usr/local' as below:
> checking what FC is set to... gfortran
> checking for special C compiler options needed for large files... no
> checking for _FILE_OFFSET_BITS value needed for large files... no
> configure: displaying some results
> checking for /Applications/Xcode.app/Contents/Developer/usr/bin/nm... 
> /Applications/Xcode.app/Contents/Developer/usr/bin/nm
> checking nm flags...
> checking for C-equivalent to Fortran routine "SUB"... sub_
> checking for Fortran "byte"... yes
> checking for Fortran "integer*2"... yes
> checking if Fortran "byte" is C "signed char"... configure: error: Could not 
> link conftestf.o and conftest.o
> 
> Any idea how to fix this?
> Thank you!
> Yanshi.
> 
> There's not enough information to tell just looking at the error
> message above.  The error message means a simple Fortran program
> compiled to conftestf.o can't be linked to a simple C program
> compiled into conftest.o, so that the Fortran program can call a
> function defined in the C program.
> 
> If you look at config.log towards the end of the file, the Fortran
> and C programs being compiled are shown, when the error occurs.
> The extra error information in config.log may be helpful in
> diagnosing the problem.
> 
> What I see in config.log, using compatible versions of gcc and
> gfortran, is ouput like this, indicating successful linking:
> 
> configure:19027: checking if Fortran "byte" is C "signed char"
> configure:19037: gcc -c -I/usr/local/include -g -O2 conftest.c
> conftest.c: In function 'sub_':
> conftest.c:4:3: warning: incompatible implicit declaration of built-in 
> function 'exit'
> configure:19040: $? = 0
> configure:19043: gfortran -g -O0 -fno-inline -c conftestf.f
> configure:19046: $? = 0
> configure:19049: gfortran -o conftest -g -O0 -fno-inline  conftestf.o 
> conftest.o
> configure:19052: $? = 0
> configure:19055: ./conftest
> configure:19058: $? = 0
> configure:19060: result: yes
> ...
> 
> If you can't figure it out from looking at config.log, send the whole 
> config.log
> file to us and we'll see if we can help, but it may take several days ...
> 
> --Russ
> 
> On Mar 24, 2013, at 4:22 PM, Unidata netCDF Support 
> <address@hidden<mailto:address@hidden><mailto:address@hidden>>
> wrote:
> 
> Hi Yanshi,
> 
> I am trying to install netCDF on my MACOS X 10.8.6.
> I have installed the netCDF-4.2.1.1 without error by
> 
> ./configure --disable-netcdf-4
> make
> make check
> make install
> 
> However, I could not find the the netcdf.mod and typesizes.mod under
> /usr/local/
> 
> The netCDF-4.2.1.1 package only installs the C library.  To install the 
> Fortran netCDF libaries,
> which have been in a separate distribution since C version 4.1.3, you need to 
> download the
> Fortran distribution (either the stable release or the beta test) from here:
> 
> http://www.unidata.ucar.edu/downloads/netcdf/netcdf-fortran/
> 
> and follow these instructions:
> 
> http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-fortran-install.html
> 
> Alternatively, you could use the MacPorts system (see 
> www.macports.org<http://www.macports.org>) and have the full netCDF-4
> library installed, including netCDF-Fortran, using
> 
> sudo port install netcdf-fortran
> 
> Note, that may take a while, as it may also download and install compatible 
> versions of gcc and
> gfortran ...
> 
> --Russ
> 
> So, I continued to install netCDF-fortran-4.2, and ./configure returns
> …...
> checking for Fortran "byte"... yes
> checking for Fortran "integer*2"... yes
> checking if Fortran "byte" is C "signed char"... configure: error: Could not 
> link conftestf.o and conftest.o
> 
> Any idea how to fix this?
> Thank you so much!
> Yanshi.
> 
> 
> Russ Rew                                         UCAR Unidata Program
> address@hidden<mailto:address@hidden>                      
> http://www.unidata.ucar.edu
> 
> 
> 
> Ticket Details
> ===================
> Ticket ID: FVK-122895
> Department: Support netCDF
> Priority: Normal
> Status: Closed
> 
> 
> 
> 
> 
> Russ Rew                                         UCAR Unidata Program
> address@hidden<mailto:address@hidden>                      
> http://www.unidata.ucar.edu
> 
> 
> 
> Ticket Details
> ===================
> Ticket ID: FVK-122895
> Department: Support netCDF
> Priority: Normal
> Status: Closed
> 
> 
> 
> 
> 
> Russ Rew                                         UCAR Unidata Program
> address@hidden<mailto:address@hidden>                      
> http://www.unidata.ucar.edu
> 
> 
> 
> Ticket Details
> ===================
> Ticket ID: FVK-122895
> Department: Support netCDF
> Priority: Normal
> Status: Closed
> 
> 
> 
> 
> 
Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: FVK-122895
Department: Support netCDF
Priority: Normal
Status: Closed