k-nucleotide Fortran gfortran 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
Ubuntu 13.2.0-4ubuntu3


 Fri, 01 Mar 2024 20:49:19 GMT

MAKE:
/usr/bin/gfortran -pipe -O3 -fomit-frame-pointer -march=ivybridge  -fopenmp knucleotide.f95 -o knucleotide.gfortran_run 
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/13/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x1b): undefined reference to `main'
collect2: error: ld returned 1 exit status
make: [/home/dunham/all-benchmarksgame/2000-benchmarksgame/nanobench/makefiles/u64q.programs.Makefile:218: knucleotide.gfortran_run] Error 1 (ignored)
rm knucleotide.f95

1.52s to complete and log all make actions

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

MAKE ERROR