[ncl-install] Trouble installing ncl v6.5.0 on MacOS_10.13

[Kevin Hallock]

Hi Mike,

How are you installing NCL on your machine? Did you download one of the .tar.gz files from our website <https://www.earthsystemgrid.org/dataset/ncl.650.dap/file.html>, are you building it from source, or did you install it using Homebrew?

If you are installing from a .tar.gz file from our website, then your sysadmin’s analysis is correct; the Homebrew-provided gcc/gfortran libraries have never seemed to work quite right with our precompiled binary releases of NCL. We generally recommend installing GCC 7.x from http://hpc.sourceforge.net/ <http://hpc.sourceforge.net/>, as this is the version of gcc/gfortran that we use to build our Mac binaries. (See our installation documentation <https://ncl.ucar.edu/Download/macosx.shtml#InstallCompilers> for more info.)

If you are using another installation method, please let us know so that we can continue troubleshooting.

Thanks,
Kevin


> On Oct 26, 2018, at 11:13 AM, Michael Toy - NOAA Affiliate via ncl-install <ncl-install at ucar.edu> wrote:
> 
> Hello,
> 
> I have a new Mac laptop running macOS 10.13.6 and I’m having trouble getting NCL v6.5.0 to work on it.  There seem to be dynamic library issues.  The error message I get when trying to launch ncl is:
> > ncl
> dyld: Library not loaded: /usr/local/lib/libgfortran.4.dylib
>   Referenced from: /usr/local/ncl/bin/ncl
>   Reason: image not found
> Abort
> 
> Our sysadmin, who’s helping me install this, thinks there is an incompatibility with the versions of gcc and gfortran that are loaded.
> 
> GCC:
> > gcc --version
> Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
> Apple LLVM version 10.0.0 (clang-1000.10.44.2)
> Target: x86_64-apple-darwin17.7.0
> Thread model: posix
> InstalledDir: /Library/Developer/CommandLineTools/usr/bin
> 
> GFORTRAN:
> > gfortran --version
> GNU Fortran (Homebrew GCC 8.2.0) 8.2.0
> Copyright (C) 2018 Free Software Foundation, Inc.
> 
> If you have any suggestions, I would appreciate it.
> 
> Thanks.
> 
> Regards,
> Mike
> 
> 
> 
> —————————
> Michael Toy
> Research Scientist, Model Development Branch
> NOAA Earth System Research Lab, GSD
> 325 Broadway, Boulder, Colorado
> Michael.Toy at noaa.gov <mailto:Michael.Toy at noaa.gov>
> +1-303-497-4061
> 
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