From 4bb40a7d4431b32016353d197c9fa8f59fe119a9 Mon Sep 17 00:00:00 2001
From: glx <glx@openttd.org>
Date: Sun, 24 Aug 2008 17:02:21 +0000
Subject: (svn r14154) -Fix (r14153): strndup is a GNU extension, so it doesn't
 exist on all platforms

---
 src/stdafx.h      |  5 +++++
 src/string.cpp    | 11 +++++++++++
 src/string_func.h |  7 ++++++-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/stdafx.h b/src/stdafx.h
index f6ef278c4..5ca14d082 100644
--- a/src/stdafx.h
+++ b/src/stdafx.h
@@ -145,6 +145,11 @@
 	#include <malloc.h> // alloca()
 #endif
 
+#if defined(__MINGW32__) && defined(_GNU_SOURCE)
+	/* For some weird reasons, SDL defines _GNU_SOURCE */
+	#undef _GNU_SOURCE
+#endif
+
 #if defined(WIN32)
 	#define WIN32_LEAN_AND_MEAN     // Exclude rarely-used stuff from Windows headers
 #endif
diff --git a/src/string.cpp b/src/string.cpp
index 041fa8e45..9173dc4a5 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -304,3 +304,14 @@ size_t Utf8TrimString(char *s, size_t maxlen)
 	*s = '\0';
 	return length;
 }
+
+#ifndef _GNU_SOURCE
+#include "core/math_func.hpp"
+char *strndup(const char *s, size_t len)
+{
+	len = min(strlen(s), len);
+	char *tmp = CallocT<char>(len + 1);
+	memcpy(tmp, s, len);
+	return tmp;
+}
+#endif /* !_GNU_SOURCE */
diff --git a/src/string_func.h b/src/string_func.h
index 82530ae65..7bc2d6c95 100644
--- a/src/string_func.h
+++ b/src/string_func.h
@@ -156,4 +156,9 @@ static inline bool IsWhitespace(WChar c)
 	;
 }
 
-#endif /* STRING_FUNC_H */
+#ifndef _GNU_SOURCE
+/* strndup is a GNU extension */
+char *strndup(const char *s, size_t len);
+#endif /* WIN32 || SUNOS */
+
+#endif /* !_GNU_SOURCE */
-- 
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