Mac Mojave fort 19.0 dyld error

[Barry_M_]

We have just started using fort 19.0 and Xcode 10 under MacOS 10.14

We are trying to link to netcdf-fortran library with a simple test, when linking to macports /opt/local/lib built with fortran 7.3 and my build with fortran 7.3 in /usr/local/lib, the fort link fails, yet the two gcc/gfortran libs work just fine.

The error is listed below, but listed here -

dyld: __dyld section not supported in /usr/local/ifort/lib/libnetcdff.6.dylib

Abort trap: 6

I have tried searching for the error without any success. The ifort startup script is

#!/bin/sh
# ifort
# runs ifort command after setting up variables

dir=/opt/intel
. $dir/bin/compilervars.sh -arch intel64 -platform mac

ifort "$@"

The results are -

bash-3.2# ifort hello.f -L/usr/local/ifort/lib/ -lnetcdff
bash-3.2# ./a.out
dyld: __dyld section not supported in /usr/local/ifort/lib/libnetcdff.6.dylib
 

Linking to gcc/gfortran library works fine -

bash-3.2# ifort hello.f -L/usr/local/gfortran/lib/ -lnetcdff
bash-3.2# ./a.out
 Netcdf version = 4.6.1 of Oct 25 2018 12:24:45 $
bash-3.2# ifort hello.f -L/opt/local/lib/ -lnetcdff
bash-3.2# ./a.out
 Netcdf version = 4.6.1 of Oct 25 2018 12:24:45 $
bash-3.2# cat hello.f
      character*80 nf_inq_libvers
      print *, 'Netcdf version = ', trim (nf_inq_libvers())
      end
bash-3.2# ifort -v
ifort version 19.0.0.117
bash-3.2#
[mac27:~] bmcinnes%

bash-3.2# ifort hello.f -L/usr/local/ifort/lib/ -lnetcdff
bash-3.2# otool -L a.out
a.out:
    /usr/local/ifort/lib/libnetcdff.6.dylib (compatibility version 8.0.0, current version 8.1.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.200.5)
bash-3.2# ls -l /opt/intel
total 8
drwxr-xr-x   6 root  wheel   192 Jun 28 08:10 .pset
drwxr-xr-x  45 root  wheel  1440 Oct 12 07:20 .scripts
-rw-r--r--   1 root  wheel    11 Oct 12 07:20 .version
drwxr-xr-x  17 root  wheel   544 Oct 12 07:20 bin
lrwxr-xr-x   1 root  wheel    30 Oct 12 07:20 compilers_and_libraries -> ./compilers_and_libraries_2019
drwxr-xr-x   3 root  wheel    96 Oct 12 07:20 compilers_and_libraries_2019
drwxr-xr-x   5 root  wheel   160 Oct 12 07:19 compilers_and_libraries_2019.0.117
drwxr-xr-x   5 root  wheel   160 Oct 12 07:20 conda_channel
drwxr-xr-x   6 root  wheel   192 Oct 12 07:20 debugger_2019
drwxr-xr-x   3 root  wheel    96 Oct 12 07:19 documentation_2019
lrwxr-xr-x   1 root  wheel    37 Oct 12 07:20 include -> ./compilers_and_libraries/mac/include
lrwxr-xr-x   1 root  wheel    45 Oct  5  2017 intel_sdp_products.tgz.db -> /opt/intel/.pset/db/intel_sdp_products.tgz.db
drwxr-xr-x   5 root  wheel   160 Oct 12 07:20 ism
lrwxr-xr-x   1 root  wheel    33 Oct 12 07:20 lib -> ./compilers_and_libraries/mac/lib
drwxr-xr-x   3 root  bin      96 Jun 28 08:10 licenses
lrwxr-xr-x   1 root  wheel    27 Oct 12 07:20 man -> ./documentation_2019/en/man
lrwxr-xr-x   1 root  wheel    33 Oct 12 07:20 mkl -> ./compilers_and_libraries/mac/mkl
lrwxr-xr-x   1 root  wheel    31 Oct 12 07:20 parallel_studio_xe_2019 -> ./parallel_studio_xe_2019.0.030
drwxr-xr-x   9 root  wheel   288 Oct 12 07:20 parallel_studio_xe_2019.0.030
drwxr-xr-x   3 root  wheel    96 Oct 12 07:20 samples_2019
lrwxr-xr-x   1 root  wheel    33 Oct 12 07:20 tbb -> ./compilers_and_libraries/mac/tbb
bash-3.2#

[Juergen_R_R]

Libraries built with gfortran are not compatible with program compiled and linked with ifort. At least, you have to link the libgfortran as well, but I am not sure that it works in that case.

[Barry_M_]

Thanks for looking at the problem. I have edited the original to make the error a bit clearer (I hope).

The links to fortran/gcc libraries works fine with fort, it is the fort compiled library link that causes the problem.

[Hines__Melissa]

I found an easy solution to this problem: downgrade to Xcode 9.4.1, which Apple says is still compatible with Mojave.

[Barry_M_]

Thanks for the suggestion, we have been on furlough, so sorry its taken so long to reply.

We cannot really go back to 9.4, so have logged it with Apple and hoping to try Xcode 10.2 beta but the current download fails to install 10.2 CLT beta.