I am getting a strange error when trying to compile a simple fortran-90 file using gfortran. I am working on a macOS mojave system. I have gfortran 8.2.0 installed and I checked to be sure of this by doing the following:
Input: gfortran --version
Output: 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.
Which indicates that gfortran installed correctly and I also confirmed this by typing simply: gfortran, into the terminal, which returns:
gfortran: fatal error: no input files
compilation terminated.
However, when I try to compile my file like so:
gfortran hello.f90 -o hello.x
I get an error which reads:
ld: library not found for -lSystem
collect2: error: ld returned 1 exit status
I've tried compiling in different ways and I also tried setting the LD_LIBRARY_PATH in .bash_profile as described by https://gcc.gnu.org/wiki/GFortranBinaries32Linux but I still get the same error. The gfortran directory has the pathname: /usr/local/gfortran, however another gfortran which is not a directory can be found in /usr/local/bin
Typing:
which gfortran
Outputs:
/usr/local/bin/gfortran
And a long list search of this directory:
Input: ls -l /usr/local/bin/gfortran
Output: lrwxr-xr-x 1 root wheel 32 15 May 14:07
/usr/local/bin/gfortran -> /usr/local/gfortran/bin/gfortran
How can I fix this where everything seems to be correctly installed?
Any help would be greatly appreciated!
I had the same problem, but installing gfortran build from the gcc package using homebrew did not help. Instead, I installed the whole gcc using homebrew:
brew install gcc
and that solved the problem.