Hello
I have just installed Ubuntu 18.04 LTS on my laptop and I'm new to this. I am required to run my Model which is called IBIS, so I have to install g77 or f77. I could not install these compilers. Finally, I installed fort 77. Then, I am trying to compile my Model with the NetCDF library. The environment variable which is needed to compile my model is: F77, F77_OPTIONS, INCLUDE_DIRS, LD_OPTIONS_NETCDF Could anybody help me how can I determine these variable?
For the Fortran compiler try:
sudo apt-get install gfortran
and after the installation try
export F77=gfortran
and for the NetCDF try
sudo apt-get install libnetcdff7 libnetcdff-dev
Hello,
Thank you for answering my question. I have tried sudo apt-get install libnetcdff7 libnetcdff-dev but it shows me E: Unable to locate package libnetcdff7. So, I tried sudo apt-get install libnetcdf-dev libnetcdff-dev. I think I have installed netCDF-Fortran 4.4.4 but I'm not sure. Could you please help me how can I understand I have installed libnetcdf well? And after install gfortran I should make a link between the FORTRAN compiler and libnetcdf?
For sure your compiler calls "ld" to link your objects during the compilation but you should not do anything else. The library files go to /urs/lib and /usr/include which is already in your compiler's search path.
if you have an output for this command it means everything is fine:
nf-config --all
the output should look like this:
This netCDF-Fortran 4.4.4 has been built with the following features:
--cc -> gcc
--cflags -> -I/usr/include -Wdate-time -D_FORTIFY_SOURCE=2
--fc -> gfortran
--fflags -> -I/usr/include
--flibs -> -L/usr/lib -lnetcdff -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -lnetcdf -lnetcdf
--has-f90 -> no
--has-f03 -> yes
--has-nc2 -> yes
--has-nc4 -> yes
--prefix -> /usr
--includedir-> /usr/include
--version -> netCDF-Fortran 4.4.4
Yes, I have exactly something like this. So, the environment variable which I have told you (F77, F77_OPTIONS, INCLUDE_DIRS) will be determined like below?
( I have not known how to determine F77_OPTIONS yet)
F77 - the compiler I want to use. F77_OPTIONS - any additional options, like -g for debugging or -O2 for optimization and the like. INCLUDE_DIRS - that could be anything, but I guess the directories that contain your extra included files. LD_OPTIONS_NETCDF - presumably the option to indicate where the NetCDF library is stored.
F77 = gfortran F77_OPTIONS =? INCLUDE_DIRS = -I/usr/include LD_OPTIONS_NETCDF = -L/usr/lib -lnetcdff
Leave it empty (F77_OPTIONS) or put -O0 to make sure everything works well. Then used -O3 for production runs.
The rest of the variables looks fine. If you see errors with this configuration, post it here.
Could you please tell me what is c and > at the first of the Fortran code? like:
c global 0.5 x 0.5 grid: 720 by 360 array, with 58920 land points: c c parameter (nlon = 720, c > nlat = 360, c > npoi = 58920, c > xres = 0.50, c > yres = 0.50)
In Fortran 77, if "c" are comments. The lines started with "c" are ignored by the compiler:
https://web.stanford.edu/class/me200c/tutorial_77/03_basics.html
I'm a bit confused.
netCDF has both Fortran77 and Fortran90 APIs, so compiling with F77 seems to be limiting.
https://www.unidata.ucar.edu/software/netcdf/docs-fortran/
Building from source, version 4.5.3, looks for a Fortran90 compiler.
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