From f62d380b2f0b2f4ab16dd2e3d76df9d4e4997e3f Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Thu, 27 Apr 2023 18:57:04 +0200
Subject: [PATCH] build/yosys_wrapper: Skip language=None files.

---
 litex/build/yosys_wrapper.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/litex/build/yosys_wrapper.py b/litex/build/yosys_wrapper.py
index 504bd9e5b..c720f5abc 100644
--- a/litex/build/yosys_wrapper.py
+++ b/litex/build/yosys_wrapper.py
@@ -81,6 +81,8 @@ class YosysWrapper():
             # yosys has no such function read_systemverilog
             if language == "systemverilog":
                 language = "verilog -sv"
+            if language is None:
+                continue
             reads.append(f"read_{language}{includes} {filename}")
         return "\n".join(reads)