[lwip-devel] [patch #9072] Add missing include for lwip/sys.h

[Sylvain Rochet]

Follow-up Comment #8, patch #9072 (project lwip):

It only means your random.h (or whatever name used) doesn't properly declare
your random function prototype.


For example, if you are using the standard libc rand() function, your cc.h
should look like this:

cc.h:
  #include <stdlib.h>
  #define LWIP_RAND() ((u32_t)rand())


If your random function lives in random.c/random.h, it should look like this:

random.h:
  u32_t my_random_function(void);

random.c:
  u32_t my_random_function(void) {
    return <...random generator here....>;
  }

cc.h:
  #include "random.h"
  #define LWIP_RAND() my_random_function()


Sylvain

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