Fix redefinition of io function

Now it should work fine with any gcc version. Old one produces error
like in #657

Signed-off-by: Alexey 'Alexxy' Shvetsov <alexxyum@gmail.com>

src/platforms/f4discovery/platform.h

@@ -153,11 +153,37 @@ static inline int platform_hwversion(void)
 	return 0;
 }
 
-/* Use newlib provided integer only stdio functions */
-#define sscanf siscanf
-#define sprintf siprintf
-#define vasprintf vasiprintf
-#define snprintf sniprintf
+/*
+ * Use newlib provided integer only stdio functions
+ */
 
+/* sscanf */
+#ifdef sscanf
+#undef sscanf
+#define sscanf siscanf
+#else
+#define sscanf siscanf
+#endif
+/* sprintf */
+#ifdef sprintf
+#undef sprintf
+#define sprintf siprintf
+#else
+#define sprintf siprintf
+#endif
+/* vasprintf */
+#ifdef vasprintf
+#undef vasprintf
+#define vasprintf vasiprintf
+#else
+#define vasprintf vasiprintf
+#endif
+/* snprintf */
+#ifdef snprintf
+#undef snprintf
+#define snprintf sniprintf
+#else
+#define snprintf sniprintf
 #endif
 
+#endif

src/platforms/hydrabus/platform.h

@@ -153,11 +153,38 @@ static inline int platform_hwversion(void)
 	return 0;
 }
 
-/* Use newlib provided integer only stdio functions */
+/*
+ * Use newlib provided integer only stdio functions
+ */
+
+/* sscanf */
+#ifdef sscanf
+#undef sscanf
 #define sscanf siscanf
+#else
+#define sscanf siscanf
+#endif
+/* sprintf */
+#ifdef sprintf
+#undef sprintf
 #define sprintf siprintf
+#else
+#define sprintf siprintf
+#endif
+/* vasprintf */
+#ifdef vasprintf
+#undef vasprintf
 #define vasprintf vasiprintf
+#else
+#define vasprintf vasiprintf
+#endif
+/* snprintf */
+#ifdef snprintf
+#undef snprintf
 #define snprintf sniprintf
+#else
+#define snprintf sniprintf
+#endif
 
 #endif
 

src/platforms/native/platform.h

@@ -178,10 +178,37 @@ int usbuart_debug_write(const char *buf, size_t len);
 #define SET_IDLE_STATE(state)	{gpio_set_val(LED_PORT, LED_IDLE_RUN, state);}
 #define SET_ERROR_STATE(state)	{gpio_set_val(LED_PORT, LED_ERROR, state);}
 
-/* Use newlib provided integer only stdio functions */
+/*
+ * Use newlib provided integer only stdio functions
+ */
+
+/* sscanf */
+#ifdef sscanf
+#undef sscanf
 #define sscanf siscanf
+#else
+#define sscanf siscanf
+#endif
+/* sprintf */
+#ifdef sprintf
+#undef sprintf
 #define sprintf siprintf
-#define snprintf sniprintf
+#else
+#define sprintf siprintf
+#endif
+/* vasprintf */
+#ifdef vasprintf
+#undef vasprintf
 #define vasprintf vasiprintf
+#else
+#define vasprintf vasiprintf
+#endif
+/* snprintf */
+#ifdef snprintf
+#undef snprintf
+#define snprintf sniprintf
+#else
+#define snprintf sniprintf
+#endif
 
 #endif

src/platforms/stlink/platform.h

@@ -148,11 +148,39 @@ extern uint16_t led_idle_run;
 
 extern uint32_t detect_rev(void);
 
-/* Use newlib provided integer only stdio functions */
+/*
+ * Use newlib provided integer only stdio functions
+ */
+
+/* sscanf */
+#ifdef sscanf
+#undef sscanf
 #define sscanf siscanf
+#else
+#define sscanf siscanf
+#endif
+/* sprintf */
+#ifdef sprintf
+#undef sprintf
 #define sprintf siprintf
+#else
+#define sprintf siprintf
+#endif
+/* vasprintf */
+#ifdef vasprintf
+#undef vasprintf
 #define vasprintf vasiprintf
+#else
+#define vasprintf vasiprintf
+#endif
+/* snprintf */
+#ifdef snprintf
+#undef snprintf
 #define snprintf sniprintf
+#else
+#define snprintf sniprintf
+#endif
+
 
 #endif
 

src/platforms/swlink/platform.h

@@ -154,11 +154,38 @@ extern void set_idle_state(int state);
 
 extern uint8_t detect_rev(void);
 
-/* Use newlib provided integer only stdio functions */
+/*
+ * Use newlib provided integer only stdio functions
+ */
+
+/* sscanf */
+#ifdef sscanf
+#undef sscanf
 #define sscanf siscanf
+#else
+#define sscanf siscanf
+#endif
+/* sprintf */
+#ifdef sprintf
+#undef sprintf
 #define sprintf siprintf
+#else
+#define sprintf siprintf
+#endif
+/* vasprintf */
+#ifdef vasprintf
+#undef vasprintf
 #define vasprintf vasiprintf
+#else
+#define vasprintf vasiprintf
+#endif
+/* snprintf */
+#ifdef snprintf
+#undef snprintf
 #define snprintf sniprintf
+#else
+#define snprintf sniprintf
+#endif
 
 #endif