configure

#!/usr/bin/perl

  if($#ARGV == 0) {
     $response = shift(@ARGV) ;
     print("Configure build environment: $response \n");
  }else {
     print "Please select from following predefined environments: \n\n";

     print "   1. Cheyenne pgf compiler \n";
     print "   2. Linux PGI compiler \n";
     print "   3. MacOS gfortran compiler, NETCDF from source \n";
     print "   4. MacOS BigSur gfortran compiler, NETCDF from Brew \n";
     print "   5. Linux gfortran compiler, NETCDF from source or module load  \n";
     print "   0. exit only \n";

     printf "\nEnter selection : " ;

     $response = <STDIN> ;
     chop($response);
  }

  if ($response == 1) {
              # Cheyenne 
              system "cp config/user_build_options.cheyenne user_build_options"; 
            }

  elsif ($response == 2) {
              # Linux with pgf90 compiler
              system "cp config/user_build_options.pgf90.linux user_build_options"; 
            }

  elsif ($response == 3) {
              # MacOS, gfortran, NETCDF from source
              system "cp config/user_build_options.macos.gfortran user_build_options"; 
            }

    elsif ($response == 4) {
                # MacOS Big Sur, gfortran, NETCDF from source
                system "cp config/user_build_options.bigsur.gfortran user_build_options"; 
              }
    elsif ($response == 5) {
                # Linux, gfortran, NETCDF from source
                system "cp config/user_build_options.gfortran.linux user_build_options"; 
              }

  else   {print "no selection $response\n"; last}