https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100972
--- Comment #1 from G. Steinmetz <gs...@t-online.de> ---
Similarly, the helpful option -Wimplicit-procedure does not warn :
(-Wimplicit-procedure : Warn if a procedure is called that has neither
an explicit interface nor has been declared as EXTERNAL.)
$ gfortran-12-20210606 -c z1.f90 -Wimplicit-procedure
$
And the following error message refers to "IMPORT" :
$ _g2_v12test -c z1.f90 -std=f2008
z1.f90:2:19:
2 | implicit none (external)
| 1
Error: Fortran 2018: IMPORT NONE with spec list at (1)
