How do I resolve “library not found for -lgfortran

问题:

I am trying to build a Rust app and I get the below when trying to build. This happened after I installed ndarray-linalg and ndarray.

I installed gcc and openvc. I am on macOS.

 = note: ld: library not found for -lgfortran
          clang: error: linker command failed with exit code 1 (use -v to see invocation)

How do I resolve this?

which gfortran
/usr/local/bin/gfortran

I found the library here:

ls /usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgfortran.*
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgfortran.5.dylib    
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgfortran.dylib
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgfortran.a      
/usr/local/Cellar/gcc/8.2.0/lib/gcc/8/libgfortran.spec

ldconfig -p | grep fortran
-bash: ldconfig: command not found

And also ran the below:

brew reinstall gcc

How can I make sure Rust will find it?