From 95ce4f2bc20432585b91c46f031a73a64f5f18ef Mon Sep 17 00:00:00 2001
From: Philip Top <top1@llnl.gov>
Date: Sun, 6 Nov 2016 07:38:16 -0800
Subject: [PATCH] Update zmq.hpp

add const to what function of error_t
---
 zmq.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zmq.hpp b/zmq.hpp
index 92c7123..28dc67b 100644
--- a/zmq.hpp
+++ b/zmq.hpp
@@ -119,7 +119,7 @@ namespace zmq
 
         error_t () : errnum (zmq_errno ()) {}
 #ifdef ZMQ_CPP11
-        virtual const char *what () noexcept
+        virtual const char *what () const noexcept
         {
             return zmq_strerror (errnum);
         }