Merge pull request #87 from slimsag/master

Fix undefined symbols on Windows. See #82

glfw_win32_init.c

@@ -1,4 +1,26 @@
 #ifdef _GLFW_WIN32
+
+	// Bug fix for 6l/8l on Windows, see:
+	//  https://github.com/go-gl/glfw3/issues/82#issuecomment-53859967
+	#include <stdlib.h>
+	#include <string.h>
+
+	#ifndef strdup
+	char *strdup (const char *str) {
+		char *new = malloc(strlen(str));
+		strcpy(new, str);
+		return new;
+	}
+	#endif
+
+	// http://msdn.microsoft.com/en-us/library/571yb472.aspx
+	#include <stdio.h>
+	#ifndef _get_output_format
+	unsigned int _get_output_format(void) {
+		return 0;
+	};
+	#endif
+
 	#include "glfw/src/win32_init.c"
 #endif