[lwip-devel] [bug #25352] No MEMP_PBUF_POOL definition.

[Jonathan Larmour]

Update of bug #25352 (project lwip):

                  Status:                    None => Works For Me           
             Assigned to:                    None => jifl                   
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #1:

This is not an lwIP problem, but something with your port. pbuf.c does depend
on MEM_PBUF_POOL, but that gets defined in memp_std.h which is in turn
included from memp.h. What happens si that memp.h defines a macro
LWIP_MEMPOOL, which includes memp_std.h multiple times with different values
of the LWIP_MEMPOOL macro. In the first one, it is set as this:
typedef enum {
#define LWIP_MEMPOOL(name,num,size,desc)  MEMP_##name,
#include "lwip/memp_std.h"
  MEMP_MAX
} memp_t;
And in memp_std.h, there is:
#define LWIP_PBUF_MEMPOOL(name, num, payload, desc) LWIP_MEMPOOL(name, num,
(MEMP_ALIGN_SIZE(sizeof(struct pbuf)) + MEMP_ALIGN_SIZE(payload)), desc)
and
LWIP_PBUF_MEMPOOL(PBUF_POOL, PBUF_POOL_SIZE,           PBUF_POOL_BUFSIZE,
      "PBUF_POOL")

Note the use of the preprocessor string concatenation operator. So that's how
MEMP_PBUF_POOL gets defined.

Further discussion is better suited to the lwip-users list.


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