kconfig: do not overwrite symbol direct dependency in assignment

Considering the following configuration:

config F
    bool "F"

choice AB
    bool "AB"
config A
    bool "A"
config B
    bool "B"
endchoice

if A
config D
    bool
    default y if F
    select E
config E
    bool "E"
endif

if B
config D
    bool
    default y if F
    select E
config E
    bool "E"
endif

The following configuration:

 CONFIG_F=y
 CONFIG_A=y
 # CONFIG_B is not set
 CONFIG_D=y
 CONFIG_E=y

emits a spurious warning:

(D) selects E which has unmet direct dependencies (B)

If a symbol appears in two different branch of the tree, it should inherit the
dependency of both parent, not just the last one.

Reported-by: Yann E. Morin <yann.morin.1998@anciens.enib.fr>
Tested-by: Yann E. Morin <yann.morin.1998@anciens.enib.fr>
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index aab5a1f..d660086 100644 (file)
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -351,7 +351,7 @@ void menu_finalize(struct menu *parent)
                        last_menu->next = NULL;
                }
 
-               sym->dir_dep.expr = parent->dep;
+               sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
        }
        for (menu = parent->list; menu; menu = menu->next) {
                if (sym && sym_is_choice(sym) &&