One more patch (or hardcoded hack, rather) later the ‘Hello World’ example in Fortran was up and running, clearing the way to build the BLAS (Basic Linear Algebra Subprograms) and LAPACK ...

Basic Linear Algebra Subprograms (BLAS) and BLAS-like extension transposition routines Sparse BLAS Levels 1, 2, and 3 LAPACK routines for solving systems of linear equations, least-squares problems, ...