Added a workaround for printing size_t.

docs/examples/printf_macro.h

@@ -0,0 +1,45 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+/* Simple hack trying to get a valid printf format string for size_t.
+ * If that fails for your platform you can define your own _FMT_SIZE_T,
+ * f.e.: -D_FMT_SIZE_T="zd"
+ */
+#ifndef _PRINTF_MACRO_H
+#define _PRINTF_MACRO_H
+
+#ifndef _FMT_SIZE_T
+#ifdef WIN32
+#define _FMT_SIZE_T "Id"
+#else
+/*
+"zd" is a GNU extension to POSIX; so we dont use it for size_t but hack around
+#define _FMT_SIZE_T "zd"
+*/
+#ifdef __x86_64__
+#define _FMT_SIZE_T "lu"
+#else
+#define _FMT_SIZE_T "u"
+#endif /* __x86_64__ */
+#endif /* WIN32 */
+#endif /* !_FMT_SIZE_T */
+
+#endif /* !_PRINTF_MACRO_H */