[Bug fortran/69495] unused-label warning does not tell which flag triggered it

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69495

--- Comment #9 from janus at gcc dot gnu.org ---
Created attachment 37527
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37527&action=edit
patch

The attached patch should take care of all cases mentioned above.

Unfortunately it causes a testsuite failure of elemental_optional_args_6.f90
and I just cannot understand why :(