update kbuild system

1 files changed, 10 insertions, 0 deletions

diff --git a/package/config/expr.c b/package/config/expr.c
index 10f45232b..30e4f9d69 100644
--- a/package/config/expr.c
+++ b/package/config/expr.c
@@ -1087,3 +1087,13 @@ void expr_fprint(struct expr *e, FILE *out)
 {
 	expr_print(e, expr_print_file_helper, out, E_NONE);
 }
+
+static void expr_print_gstr_helper(void *data, const char *str)
+{
+	str_append((struct gstr*)data, str);
+}
+
+void expr_gstr_print(struct expr *e, struct gstr *gs)
+{
+	expr_print(e, expr_print_gstr_helper, gs, E_NONE);
+}