From 99eeb4b432de13e0c96a84781675709a1b5f5281 Mon Sep 17 00:00:00 2001
From: Leandro Lanzieri <leandro.lanzieri@haw-hamburg.de>
Date: Fri, 16 Oct 2020 13:55:41 +0200
Subject: [PATCH] kconfiglib: check for empty strings on macro expansion

---
 kconfiglib.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kconfiglib.py b/kconfiglib.py
index c67895c..c026250 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -2612,7 +2612,7 @@ def _parse_assignment(self, s):
             else:
                 break
 
-        if s.isspace():
+        if not s or s.isspace():
             # We also accept a bare macro on a line (e.g.
             # $(warning-if,$(foo),ops)), provided it expands to a blank string
             return