real r do r=1.0,2.0 print*,r enddo end gives legacy.f:2.10:
do r=1.0,2.0 1 Warning: Obsolete: REAL DO loop iterator at (1) which is ok, however do r=1.0,2.0 print*,r enddo end compiles without warning! the same for implicit real(a-z) do r=1.0,2.0 print*,r enddo end Additionally: It seems this warning is tied to -std=legacy, perhaps it would make more sense to tie it to -Wsurprising as it was the case for g77. -- Summary: missing warning for real do-loops with implicit typed variables Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: manfred99 at gmx dot ch http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31162