http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55352
--- Comment #3 from janus at gcc dot gnu.org 2012-11-16 21:43:34 UTC ---
(In reply to comment #2)
> I guess we should either set attr.referenced in gfc_match_namelist (match.c),
> or check for attr.in_namelist in generate_local_decl (trans-decl.c).
The latter is what we do for related cases. Proposed patch:
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 193567)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -4589,23 +4589,26 @@ generate_local_decl (gfc_symbol * sym)
}
/* Warn for unused variables, but not if they're inside a common
- block, a namelist, or are use-associated. */
+ block or a namelist. */
else if (warn_unused_variable
- && !(sym->attr.in_common || sym->attr.use_assoc || sym->mark
- || sym->attr.in_namelist))
+ && !(sym->attr.in_common || sym->mark || sym->attr.in_namelist))
{
- gfc_warning ("Unused variable '%s' declared at %L", sym->name,
- &sym->declared_at);
- if (sym->backend_decl != NULL_TREE)
- TREE_NO_WARNING(sym->backend_decl) = 1;
+ if (sym->attr.use_only)
+ {
+ gfc_warning ("Unused module variable '%s' which has been "
+ "explicitly imported at %L", sym->name,
+ &sym->declared_at);
+ if (sym->backend_decl != NULL_TREE)
+ TREE_NO_WARNING(sym->backend_decl) = 1;
+ }
+ else if (!sym->attr.use_assoc)
+ {
+ gfc_warning ("Unused variable '%s' declared at %L",
+ sym->name, &sym->declared_at);
+ if (sym->backend_decl != NULL_TREE)
+ TREE_NO_WARNING(sym->backend_decl) = 1;
+ }
}
- else if (warn_unused_variable && sym->attr.use_only)
- {
- gfc_warning ("Unused module variable '%s' which has been explicitly "
- "imported at %L", sym->name, &sym->declared_at);
- if (sym->backend_decl != NULL_TREE)
- TREE_NO_WARNING(sym->backend_decl) = 1;
- }
/* For variable length CHARACTER parameters, the PARM_DECL already
references the length variable, so force gfc_get_symbol_decl
