espmissingincludes.h

encapsulate os_printf macro with do/while to avoid
unwanted side effects during macro expansion

include/espmissingincludes.h

@@ -53,10 +53,11 @@ int os_snprintf(char *str, size_t size, const char *format, ...) __attribute__((
 int os_printf_plus(const char *format, ...)  __attribute__((format(printf, 1, 2)));
 
 #undef os_printf
-#define os_printf(format, ...) \
+#define os_printf(format, ...) do {                                           \
     system_set_os_print(true);                                                \
     os_printf_plus(format, ## __VA_ARGS__);                                   \
-  system_set_os_print(DEBUG_SDK); // int os_printf(const char *format, ...)
+    system_set_os_print(DEBUG_SDK);                                           \
+  } while (0)
 
 
 // memory allocation functions are "different" due to memory debugging functionality