k-nucleotide Classic 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
Fortran Compiler Classic
2021.12.0 20240222


 Mon, 03 Jun 2024 19:42:19 GMT

MAKE:
mv knucleotide.ifc knucleotide.f90
~/intel/oneapi/compiler/latest/bin/ifort -O3 -march=ivybridge -qopenmp knucleotide.f90 -o knucleotide.ifc_run
ifort: remark #10448: Intel(R) Fortran Compiler Classic (ifort) is now deprecated and will be discontinued late 2024. Intel recommends that customers transition now to using the LLVM-based Intel(R) Fortran Compiler (ifx) for continued Windows* and Linux* support, new language support, new language features, and optimizations. Use '-diag-disable=10448' to disable this message.
ld: /home/dunham/intel/oneapi/compiler/2024.1/bin/../lib/for_main.o: in function `main':
for_main.c:(.text+0x19): undefined reference to `MAIN__'
make: [/home/dunham/all-benchmarksgame/2000-benchmarksgame/nanobench/makefiles/u64q.programs.Makefile:246: knucleotide.ifc_run] Error 1 (ignored)
rm knucleotide.f90

2.19s to complete and log all make actions

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

MAKE ERROR