[lwip-devel] lwip-1.4.1 based on ADS IDE(RVDS2.2) compile failed

[薛佳元]

Dear Sir:

          I am a LWIP  primary programmer.

          now,my project situation as below:

          uc/os-II(2.86)  + lwip(1.4.1 table) + RVDS2.2(armcc  IDE:ADS) + s3c6410

         

          case 1:

          in cc.h

           #define PACK_STRUCT_FIELD(x)   x __attribute__((packed))
           #define PACK_STRUCT_STRUCT   __attribute__((packed))
           #define PACK_STRUCT_BEGIN
           #define PACK_STRUCT_END

           compile pass!

                      I am so happy,  but "__attribute__((packed))" is the standard usage under GUN CC,my compiler is ARMCC.

           so I have to change to case 2.

 

          case 2:

          in cc.h 

          #define PACK_STRUCT_FIELD(x)  __packed x
          #define PACK_STRUCT_STRUCT   
          #define PACK_STRUCT_BEGIN   __packed
          #define PACK_STRUCT_END

           this time compile failed as follow:

           argument of type "const __packed u8_t *" is incompatible with parameter of type "const void *"            

 

           I track the code stop at etharp.c  line 1340: 

           "} else if (eth_addr_cmp(&ethhdr->dest, &ethbroadcast)) {"       

          and #define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETHARP_HWADDR_LEN) == 0)

          I think I found the problem :

          prototype: int memcmp(constvoid*buf1,constvoid*buf2,unsignedintcount);

          but  &ethhdr->dest  and  &ethbroadcast   have something redundant"__packed"

 

          the problem is I should not modify your source code, so give me a solution please,I would appreciate so much!