powellopt fails to build on Sonoma: Error: Symbol 'n' at (1) has no IMPLICIT type

[barracuda156]

​https://github.com/jacobwilliams/PowellOpt/issues/8

 + gfortran -c ././src/cobyla.f90   -O3 -funroll-loops -Wimplicit-interface -fPIC -fmax-errors=1 -fcoarray=single -fimplicit-none -Werror=implicit-interface -ffree-form -J build/gfortran_2654F75F5833692A -Ibuild/gfortran_2654F75F5833692A -o build/gfortran_2654F75F5833692A/PowellOpt/src_cobyla.f90.o
././src/cobyla.f90:138:24:

  138 |     subroutine cobylb (n, m, mpp, x, rhobeg, rhoend, iprint, maxfun, con, sim, simi, &
      |                        1
Error: Symbol 'n' at (1) has no IMPLICIT type
compilation terminated due to -fmax-errors=1.
[ 25%]                     cobyla.f90  done.

././src/cobyla.f90:138:24:

  138 |     subroutine cobylb (n, m, mpp, x, rhobeg, rhoend, iprint, maxfun, con, sim, simi, &
      |                        1
Error: Symbol 'n' at (1) has no IMPLICIT type
compilation terminated due to -fmax-errors=1.
<ERROR> Compilation failed for object " src_cobyla.f90.o "
<ERROR> stopping due to failed compilation
STOP 1

[barracuda156]

In c76c7b625eed9ae3d1b942b5ca236cb4d1d2c45c/macports-ports (master):

powellopt: update to 2023.12.03

Fixes: #68800
See: ​https://github.com/jacobwilliams/PowellOpt/issues/8