The following is non-standard and the compiler should probably generate a warning/error with '-pedantic -std=f95', but does not do so with gcc version 4.3.0 20080103 (experimental) [trunk revision 131300] (GCC)
module test_mod interface subroutine my_sub (a) real a end subroutine end interface end module subroutine my_sub (a) use test_mod real a print *, a end subroutine END -- Summary: program-unit MY_SUB imports symbol MY_SUB Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: jv244 at cam dot ac dot uk http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34657