k-nucleotide Intel Fortran program

! The Computer Language Benchmarks Game
! https://salsa.debian.org/benchmarksgame-team/benchmarksgame/

! There does not seem to be a Fortran library
! hash-table that could be used?
    

NOTES:
64-bit Ubuntu quad core
Intel(R) Fortran Intel(R) 64 Compiler
for applications running on Intel(R) 64,
Version 19.1.1.217 Build 20200306
Copyright (C) 1985-2020 Intel Corporation.  All rights reserved.
FOR NON-COMMERCIAL USE ONLY


Wed, 06 May 2020 01:31:27 GMT

MAKE:
/opt/src/intel/bin/ifort -O3 -march=core2 -qopenmp knucleotide.f90 -o knucleotide.ifc_run
ld: /opt/src/intel/compilers_and_libraries_2020.1.217/linux/compiler/lib/intel64_lin/for_main.o: in function `main':
for_main.c:(.text+0x2e): undefined reference to `MAIN__'
make: [/home/dunham/8000-benchmarksgame/nanobench/makefiles/u64q.programs.Makefile:220: knucleotide.ifc_run] Error 1 (ignored)
rm knucleotide.f90

4.96s to complete and log all make actions

COMMAND LINE:
./knucleotide.ifc_run 0 < knucleotide-input250000.txt

MAKE ERROR