re PR fortran/31129 (No warning on unused parameters)

gcc/fortran:
2007-07-09  Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/31129
        * trans-decl.c (generate_local_decl) Emit a warning if an unused
        parameter is found.

gcc/testsuite:
2007-07-09  Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/31129
        * gfortran.dg/parameter_unused.f90: New test.

From-SVN: r126486

gcc/fortran/ChangeLog

+2007-07-09  Daniel Franke  <franke.daniel@gmail.com>
+
+	PR fortran/31129
+	* trans-decl.c (generate_local_decl) Emit a warning if an unused
+	parameter is found.
+
 2007-07-08  Daniel Franke  <franke.daniel@gmail.com>
 
 	PR fortran/29876

gcc/fortran/trans-decl.c

@@ -3035,6 +3035,14 @@ generate_local_decl (gfc_symbol * sym)
       if (sym->attr.dummy && sym->backend_decl != NULL_TREE)
 	  TREE_NO_WARNING(sym->backend_decl) = 1;
     }
+  else if (sym->attr.flavor == FL_PARAMETER)
+    {
+      if (warn_unused_variable 
+           && !sym->attr.referenced
+           && !sym->attr.use_assoc)
+	gfc_warning ("unused parameter '%s' declared at %L", sym->name,
+		     &sym->declared_at);
+    }
 
   if (sym->attr.dummy == 1)
     {

gcc/testsuite/ChangeLog

+2007-07-09  Daniel Franke  <franke.daniel@gmail.com>
+
+	PR fortran/31129
+	* gfortran.dg/parameter_unused.f90: New test.
+
 2007-07-09  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR tree-optimization/32681

gcc/testsuite/gfortran.dg/parameter_unused.f90

+! { dg-do compile }
+! { dg-options "-Wunused" }
+!
+! PR fortran/31129 - No warning on unused parameters
+!
+program fred
+integer,parameter :: j = 9     ! { dg-warning "unused parameter" }
+end
+