Introduce platform-specific EC_PRINT

Rationale: not all operating systems use function printf for printing
console messages. This commits allows to define platform-specific
functions.

osal/intime/osal_defs.h

@@ -11,6 +11,15 @@ extern "C"
 {
 #endif
 
+// define if debug printf is needed
+//#define EC_DEBUG
+
+#ifdef EC_DEBUG
+#define EC_PRINT printf
+#else
+#define EC_PRINT(...) do {} while (0)
+#endif
+
 #ifndef PACKED
     #ifdef _MSC_VER
     #define PACKED_BEGIN __pragma(pack(push, 1))

osal/linux/osal_defs.h

@@ -11,6 +11,15 @@ extern "C"
 {
 #endif
 
+// define if debug printf is needed
+//#define EC_DEBUG
+
+#ifdef EC_DEBUG
+#define EC_PRINT printf
+#else
+#define EC_PRINT(...) do {} while (0)
+#endif
+
 #ifndef PACKED
 #define PACKED_BEGIN
 #define PACKED  __attribute__((__packed__))

osal/rtems/osal_defs.h

@@ -11,6 +11,15 @@ extern "C"
 {
 #endif
 
+// define if debug printf is needed
+//#define EC_DEBUG
+
+#ifdef EC_DEBUG
+#define EC_PRINT printf
+#else
+#define EC_PRINT(...) do {} while (0)
+#endif
+
 #ifndef PACKED
 #define PACKED_BEGIN
 #define PACKED  __attribute__((__packed__))

osal/rtk/osal_defs.h

@@ -11,6 +11,15 @@ extern "C"
 {
 #endif
 
+// define if debug printf is needed
+//#define EC_DEBUG
+
+#ifdef EC_DEBUG
+#define EC_PRINT printf
+#else
+#define EC_PRINT(...) do {} while (0)
+#endif
+
 #ifndef PACKED
 #define PACKED_BEGIN
 #define PACKED  __attribute__((__packed__))

osal/vxworks/osal_defs.h

@@ -6,6 +6,15 @@
 #ifndef _osal_defs_
 #define _osal_defs_
 
+// define if debug printf is needed
+//#define EC_DEBUG
+
+#ifdef EC_DEBUG
+#define EC_PRINT printf
+#else
+#define EC_PRINT(...) do {} while (0)
+#endif
+
 #ifndef PACKED
 #define PACKED_BEGIN
 #define PACKED  __attribute__((__packed__))

osal/win32/osal_defs.h

@@ -11,6 +11,15 @@ extern "C"
 {
 #endif
 
+// define if debug printf is needed
+//#define EC_DEBUG
+
+#ifdef EC_DEBUG
+#define EC_PRINT printf
+#else
+#define EC_PRINT(...) do {} while (0)
+#endif
+
 #ifndef PACKED
 #define PACKED_BEGIN __pragma(pack(push, 1))
 #define PACKED