14

I have tried many workarounds (brew upgrade/update, brew doctor, reinstalling gcc and gfortran, exporting libraries path etc.) to solve this issues, but none of them succeeded. When I try to execute a Fortran executable I get the same error message:

dyld: Library not loaded: /usr/local/gfortran/lib/libgfortran.3.dylib Referenced from: /Users/... Reason: image not found

I have read many different suggestions, is there a set of steps to follow to solve this problem?

Thank you.

More info: MacOS Mojave 10.14.5

which gcc returns /usr/bin/gcc

which gfortran returns /usr/local/bin/gfortran

Roland
  • 427
  • 1
  • 4
  • 15
  • have you tried installing gfortran from here? http://coudert.name/software/gfortran-6.3-Sierra.dmg – Oo.oO Jul 25 '19 at 18:34
  • It is also a good idea to build it from sources (take a look here) http://www.owsiak.org/running-open-mpi-on-macos/ – Oo.oO Jul 25 '19 at 18:36
  • I have tried with the .dmg installer, but I still get the same error message. I have also tried to build it from source, but I get several error messages in the Terminal (e.g. ../../gcc-5.1.0/gcc/graphite-poly.h:1092:19: error: use of undeclared identifier 'isl_space_add_dims' isl_space *d2 = isl_space_add_dims (d1, isl_dim_in, n); ) – Roland Jul 26 '19 at 13:58

3 Answers3

13

SOLVED!

You need first to locate the library:

locate libgfortran.3.dylib

You should get something like

/usr/local/Cellar/gcc@5/5.5.0_3/lib/gcc/5/libgfortran.3.dylib

Then you can link the library to the right folder:

ln /usr/local/Cellar/gcc@5/5.5.0_3/lib/gcc/5/libgfortran.3.dylib /usr/local/lib/libgfortran.3.dylib
Roland
  • 427
  • 1
  • 4
  • 15
0

I had a similar issue and I found a problem. I compiled a fortran file with

 9/libgfortran.5.dylib

I realised that in meanwhile, when I upgraded the homebrew, the updated version was

 10/libgfortran.5.dylib

Which was used when I executed the file. Repeated compilation solved the problem.

Adam Ciesielski
  • 29
  • 3
0

I had to force the version of gcc:

brew install gcc@5

I symbollically linked

ln -s /usr/local/Cellar/gcc\@5/5.5.0_6/bin/gcc-5 /usr/local/bin/gcc
ln -s /usr/local/Cellar/gcc\@5/5.5.0_6/bin/gfortran-5 /usr/local/bin/gfortran
ln -s /usr/local/Cellar/gcc\@5/5.5.0_6/lib/gcc/5/libgfortran.3.dylib /usr/local/lib/libgfortran.3.dylib
ln -s /usr/local/Cellar/gcc\@5/5.5.0_6/lib/gcc/5/libquadmath.0.dylib /usr/local/lib/libquadmath.0.dylib
Milan Skocic
  • 1
  • 1