From c026579c207b81092e298858acf131c70115f89f Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Tue, 1 Oct 2019 18:45:07 +0200
Subject: [PATCH] Define environ, fixes #1424

---
 frontends/rpc/rpc_frontend.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/frontends/rpc/rpc_frontend.cc b/frontends/rpc/rpc_frontend.cc
index b4b2fa3a2..83e1353b0 100644
--- a/frontends/rpc/rpc_frontend.cc
+++ b/frontends/rpc/rpc_frontend.cc
@@ -34,6 +34,8 @@
 #include "libs/sha1/sha1.h"
 #include "kernel/yosys.h"
 
+extern char **environ;
+
 YOSYS_NAMESPACE_BEGIN
 
 #if defined(_WIN32)