Update IDF to a0468b2 (#2108)

* Update IDF to a0468b2

* add missing ld file

* Fix PIO builds and change coex policy

tools/sdk/include/coap/debug.h

@@ -0,0 +1,85 @@
+/*
+ * debug.h -- debug utilities
+ *
+ * Copyright (C) 2010-2011,2014 Olaf Bergmann <bergmann@tzi.org>
+ *
+ * This file is part of the CoAP library libcoap. Please see README for terms
+ * of use.
+ */
+
+#ifndef _COAP_DEBUG_H_
+#define _COAP_DEBUG_H_
+
+#ifndef COAP_DEBUG_FD
+#define COAP_DEBUG_FD stdout
+#endif
+
+#ifndef COAP_ERR_FD
+#define COAP_ERR_FD stderr
+#endif
+
+#ifdef HAVE_SYSLOG_H
+#include <syslog.h>
+typedef short coap_log_t;
+#else
+/** Pre-defined log levels akin to what is used in \b syslog. */
+typedef enum {
+  LOG_EMERG=0,
+  LOG_ALERT,
+  LOG_CRIT,
+  LOG_ERR,
+  LOG_WARNING,
+  LOG_NOTICE,
+  LOG_INFO,
+  LOG_DEBUG
+} coap_log_t;
+#endif
+
+/** Returns the current log level. */
+coap_log_t coap_get_log_level(void);
+
+/** Sets the log level to the specified value. */
+void coap_set_log_level(coap_log_t level);
+
+/** Returns a zero-terminated string with the name of this library. */
+const char *coap_package_name(void);
+
+/** Returns a zero-terminated string with the library version. */
+const char *coap_package_version(void);
+
+/**
+ * Writes the given text to @c COAP_ERR_FD (for @p level <= @c LOG_CRIT) or @c
+ * COAP_DEBUG_FD (for @p level >= @c LOG_WARNING). The text is output only when
+ * @p level is below or equal to the log level that set by coap_set_log_level().
+ */
+void coap_log_impl(coap_log_t level, const char *format, ...);
+
+#ifndef coap_log
+#define coap_log(...) coap_log_impl(__VA_ARGS__)
+#endif
+
+#ifndef NDEBUG
+
+/* A set of convenience macros for common log levels. */
+#define info(...) coap_log(LOG_INFO, __VA_ARGS__)
+#define warn(...) coap_log(LOG_WARNING, __VA_ARGS__)
+#define debug(...) coap_log(LOG_DEBUG, __VA_ARGS__)
+
+#include "pdu.h"
+void coap_show_pdu(const coap_pdu_t *);
+
+struct coap_address_t;
+size_t coap_print_addr(const struct coap_address_t *, unsigned char *, size_t);
+
+#else
+
+#define debug(...)
+#define info(...)
+#define warn(...)
+
+#define coap_show_pdu(x)
+#define coap_print_addr(...)
+
+#endif /* NDEBUG */
+
+#endif /* _COAP_DEBUG_H_ */