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kconfig: error out if recursive dependencies are found

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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>
This commit is contained in:
Sam Ravnborg 2007-05-06 09:20:10 +02:00
parent 04c58f8196
commit 5447d34b08
3 changed files with 13 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
scripts/kconfig/symbol.c
View file

@ -786,13 +786,15 @@ static struct symbol *sym_check_expr_deps(struct expr *e)
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 @@ struct symbol *sym_check_deps(struct symbol *sym)
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;
}

6
scripts/kconfig/zconf.tab.c_shipped
View file

@ -2132,9 +2132,11 @@ void conf_parse(const char *name)
}
menu_finalize(&rootmenu);
for_all_symbols(i, sym) {
sym_check_deps(sym);
if (sym_check_deps(sym))
zconfnerrs++;
}
if (zconfnerrs)
exit(1);
sym_set_change_count(1);
}

6
scripts/kconfig/zconf.y
View file

@ -501,9 +501,11 @@ void conf_parse(const char *name)
}
menu_finalize(&rootmenu);
for_all_symbols(i, sym) {
sym_check_deps(sym);
if (sym_check_deps(sym))
zconfnerrs++;
}
if (zconfnerrs)
exit(1);
sym_set_change_count(1);
}