[ncl-install] Undefined symbols for architecture x86_64 on MacOS X Mojave

[Kevin Hallock]

Hi Jeff,

The “ncl_ncarg-6.6.2-MacOS_10.14_64bit_gnu730.tar.gz” build of NCL on our downloads page <https://www.earthsystemgrid.org/dataset/ncl.662.dap/file.html> should work on your system. Alternatively, as Andrei suggested, you can install NCL using “conda”: http://www.ncl.ucar.edu/Download/conda.shtml <http://www.ncl.ucar.edu/Download/conda.shtml>

I hope this helps,
Kevin 

> On Oct 1, 2019, at 9:47 PM, Jeffrey Tilley via ncl-install <ncl-install at ucar.edu> wrote:
> 
> Hello:
> 
> Some time ago I downloaded NCL 6.3.0 on a MacBook Pro which is now running OS X Mojave (10.14.6).  As a WRF user I have always used the RIP post processor which utilizes NCAR Graphics and have been trying to build RIP.  I am running into a load/link error as follows:
> 
> Undefined symbols for architecture x86_64:
>   "__gfortran_stop_numeric_f08", referenced from:
>       _r1mach_ in libncarg_c.a(r1mach.o)
> ld: symbol(s) not found for architecture x86_64
> collect2: error: ld returned 1 exit status
> make: [rip] Error 1 (ignored)
> 
> So the problem appears to be in the ncarg_c library.   All the other RIP executables appear to build correctly.   My output from the requested troubleshooting commands is as follows:
> 
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ which ncl
> /usr/local/ncl-6.3.0/bin/ncl
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ ncl -V
> dyld: Library not loaded: /usr/local/lib/libgfortran.3.dylib
>   Referenced from: /usr/local/ncl-6.3.0/bin/ncl
>   Reason: image not found
> Abort trap: 6
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ otool -L 'which ncl'
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/objdump: error: 'which ncl': No such file or directory
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ env | grep NCARG
> NCARG_ROOT=/usr/local/ncl-6.3.0
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ which gcc
> /usr/bin/gcc
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ which gfortran
> /usr/local/bin/gfortran
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ gfortran --version
> GNU Fortran (GCC) 8.2.0
> Copyright (C) 2018 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> 
> (base) Jeffreys-MacBook-Pro:lib jeffreytilley$ gcc --version
> Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
> Apple clang version 11.0.0 (clang-1100.0.33.8)
> Target: x86_64-apple-darwin18.7.0
> Thread model: posix
> InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
> 
> I'm assuming that this gfortran version is incompatible with the 6.3 NCAR graphics version but would like advice on whether there is an easy fix with the NCL version I have or whether installing 6.6.2 is the quickest fix. 
> 
> Thanks,
> Jeff
> 
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