kconfig: error out if recursive dependencies are found
Sample:
config FOO
bool "This is foo"
depends on BAR
config BAR
bool "This is bar"
depends on FOO
This will result in following error message:
error: found recursive dependency: FOO -> BAR -> FOO
And will then exit with exit code equal 1 so make will stop.
Inspired by patch from: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Adrian Bunk <bunk@stusta.de>
Cc: Roman Zippel <zippel@linux-m68k.org>
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 8f06c47..c35dcc5 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -786,13 +786,15 @@
return NULL;
}
+/* return NULL when dependencies are OK */
struct symbol *sym_check_deps(struct symbol *sym)
{
struct symbol *sym2;
struct property *prop;
if (sym->flags & SYMBOL_CHECK) {
- printf("Warning! Found recursive dependency: %s", sym->name);
+ fprintf(stderr, "%s:%d:error: found recursive dependency: %s",
+ sym->prop->file->name, sym->prop->lineno, sym->name);
return sym;
}
if (sym->flags & SYMBOL_CHECKED)
@@ -816,13 +818,8 @@
goto out;
}
out:
- if (sym2) {
- printf(" %s", sym->name);
- if (sym2 == sym) {
- printf("\n");
- sym2 = NULL;
- }
- }
+ if (sym2)
+ fprintf(stderr, " -> %s%s", sym->name, sym2 == sym? "\n": "");
sym->flags &= ~SYMBOL_CHECK;
return sym2;
}