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[netCDF #YBS-587954]: netCDF Support

Hello,

When you run g++, you need to link against the netCDF C++ library, otherwise 
the resultant executable does not know where to find the 'NcVar::' functions, 
as listed below.  Try the following:

    $ g++ -o readNet readNet.cpp -l netcdf-cxx4 -l netcdf

You may need to specify the location of your C++ and C libraries, if they are 
not in the standard locations on your system. 

I hope this helps!

-Ward

> Hello,
> 
> Im sorry this is a simple error but I can’t seem to fix it. I am having 
> trouble compiling and running the C++ example file found here.
> 
> https://www.unidata.ucar.edu/software/netcdf/examples/programs/SimpleXyWr.cpp
> 
> 
> 
> I have installed netcdf4 by using brew command ‘brew install netcdf’. I can 
> see it there under Celler along with the other dependancies I installed 
> (ncview etc..)
> 
> 
> 
> I have the c++ file inside of atom and named it ‘readNet.cpp’. When I run 
> this command from the terminal I get the following errors (sudo g++ -o 
> readNet readNet.cpp)
> 
> 
> Undefined symbols for architecture x86_64:
> "netCDF::NcVar::NcVar()", referenced from:
> _main in readNet-feb390.o
> "netCDF::NcVar::operator=(netCDF::NcVar const&)", referenced from:
> _main in readNet-feb390.o
> "netCDF::NcFile::NcFile(std::__1::basic_string<char, 
> std::__1::char_traits<char>, std::__1::allocator<char> > const&, 
> netCDF::NcFile::FileMode)", referenced from:
> _main in readNet-feb390.o
> "netCDF::NcFile::~NcFile()", referenced from:
> _main in readNet-feb390.o
> "netCDF::NcVar::getVar(float*) const", referenced from:
> _main in readNet-feb390.o
> "netCDF::NcVar::getVar(std::__1::vector<unsigned long, 
> std::__1::allocator<unsigned long> > const&, std::__1::vector<unsigned long, 
> std::__1::allocator<unsigned long> > const&, void*) const", referenced from:
> _main in readNet-feb390.o
> "netCDF::NcGroup::getVar(std::__1::basic_string<char, 
> std::__1::char_traits<char>, std::__1::allocator<char> > const&, 
> netCDF::NcGroup::Location) const", referenced from:
> _main in readNet-feb390.o
> "typeinfo for netCDF::exceptions::NcException", referenced from:
> GCC_except_table0 in readNet-feb390.o
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see 
> invocation)
> 
> 
> 
> I have tried many things but I just cant seem to get it to compile. When I 
> remove the stuff inside the try and catch it runs (the blank program). Ive 
> also tried to get it running in xCode but when I link the dependancies it 
> comes up with cannot find netcdf. (#include <netcdf>).
> 
> Any help would be greatly appreciated
> 
> Thank you
> Sam
> 


Ticket Details
===================
Ticket ID: YBS-587954
Department: Support netCDF
Priority: Normal
Status: Closed
===================
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