Hi Tobias,

sorry for replying to myself now, but

Am 28.03.22 um 22:03 schrieb Harald Anlauf via Fortran:
> All current cases of printing a HOST_WIDE_INT in gcc/fortran/ use
> 'sprintf', and I did not find any other use of %wd/%wu.  So the
> mentioned implementation is not really stressed yet... ;-)

using HOST_WIDE_INT_PRINT_DEC in the format argument to gfc_error
instead of using %wd does not produce a warning and works.
(Also verified with insane character lengths on x86_64).

Harald