1 files changed, 18 insertions, 0 deletions

diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 2e7a048e0cfc..174b230a52b0 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -205,6 +205,16 @@ static void sym_calc_visibility(struct symbol *sym)
         }
         if (sym_is_choice_value(sym))
                 return;
+        /* defaulting to "yes" if no explicit "depends on" are given */
+        tri = yes;
+        if (sym->dir_dep.expr)
+                tri = expr_calc_value(sym->dir_dep.expr);
+        if (tri == mod)
+                tri = yes;
+        if (sym->dir_dep.tri != tri) {
+                sym->dir_dep.tri = tri;
+                sym_set_changed(sym);
+        }
         tri = no;
         if (sym->rev_dep.expr)
                 tri = expr_calc_value(sym->rev_dep.expr);
@@ -321,6 +331,14 @@ void sym_calc_value(struct symbol *sym)
                                 }
                         }
                 calc_newval:
+                        if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
+                                fprintf(stderr, "warning: (");
+                                expr_fprint(sym->rev_dep.expr, stderr);
+                                fprintf(stderr, ") selects %s which has unmet direct dependencies (",
+                                        sym->name);
+                                expr_fprint(sym->dir_dep.expr, stderr);
+                                fprintf(stderr, ")\n");
+                        }
                         newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
                 }
                 if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)