Luminary Micro Forums

	irmus Fresh Boarder
2008/11/18 20:40

notice about lwip-1.3.0 patch

Hi~
I'm using LM3S8962 ev kit with StellarisWare ver 3618.
When I build a enet_lwip example, I get a warning message from compiler.

Code:


 
../../../utils/../third_party/lwip-1.3.0/src/netif/etharp.c:708: error: dereferencing type-punned pointer will break strict-aliasing rules

(I'm using GNU compiler "CodeSourcery G++ Lite" so don't know how other compilers say)

So I googled this message and found a patch about it. It works fine.
Here is a URL about the patch.
http://www.nabble.com/-PATCH--Fix-aliasing-violation.-td19794741.html
Just a 1 line replacement.

Code:


 
#if 0
      hdr->sipaddr = *(struct ip_addr2 *)&netif->ip_addr;
#else
      SMEMCPY(&hdr->sipaddr, &netif->ip_addr, sizeof(hdr->sipaddr));
#endif

	kstokes1 Junior Boarder
2008/12/14 13:09

Re:notice about lwip-1.3.0 patch

Thanks for posting this, I also am using Code Sourcery and plan to add lwip to my app soon.

-Kevin

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irmus

notice about lwip-1.3.0 patch

kstokes1

Re:notice about lwip-1.3.0 patch