From 1f610129b475b417509b251e022ad46d2210ff50 Mon Sep 17 00:00:00 2001
From: Rafael Cossovan <navossoc@gmail.com>
Date: Tue, 3 Apr 2018 17:04:35 -0300
Subject: [PATCH 2/3] Fixes strerror_r GNU/XSI issue #40.
 http://www.zverovich.net/2015/03/13/reliable-detection-of-strerror-variants.html

---
 src/logger.cc | 14 ++++++++++++-
 src/logger.h  |  3 +++
 2 files changed, 15 insertions(+), 1 deletions(-)

--- a/src/logger.cc
+++ b/src/logger.cc
@@ -89,7 +89,7 @@ std::string logger::err()
         return "Unknown error";
     return buf;
 #else
-    return strerror_r(errno, buf, sizeof(buf));
+    return strerror_r_wrapper(strerror_r(errno, buf, sizeof(buf)), buf);
 #endif
 }
 
@@ -228,4 +228,16 @@ bool logger::verbosity(const std::string
     return false;
 }
 
+// XSI-compliant: int
+std::string logger::strerror_r_wrapper(int, char* s)
+{
+    return s;
+}
+
+// GNU-specific: char *
+std::string logger::strerror_r_wrapper(char* s, char*)
+{
+    return s;
+}
+
 NDPPD_NS_END
--- a/src/logger.h
+++ b/src/logger.h
@@ -91,6 +91,9 @@ private:
 
     static int _max_pri;
 
+    // helpers for strerror_r
+    static std::string strerror_r_wrapper(int, char* s);
+    static std::string strerror_r_wrapper(char* s, char*);
 
 };