Default Makefile

The default build system now targets GNU Fortran (gfortran) and provides legacy support for Fortran 77 objects.

Compiler setup

• gnu_fc = gfortran -ffree-line-length-none
  → Main compiler used for standard Fortran 90/95 source files.

• fc_legacy = gfortran -std=legacy -fallow-argument-mismatch -Ofast -ffree-line-length-none
  → Used for compiling legacy Fortran 77 files (opkda*.f, opkdmain.f).

Executable

• exec = test
  The compiled executable file name.

Example Usage

# Compile the model

make

# Run the executable

./test

# Clean after modifications

make clean