[lwip-devel] error introduced by commit acb4b60517572094bcd633c7df6fbd90836c4e2d icmp6_param_problem

[Stian Skjelstad]

Hi

I just updated my tree to the master, and I now get an error when compiling with Keil (Armcc.exe V5.06).

lwip.git\src\core\ipv6\ip6.c(979): error:  #167: argument of type "__packed u16_t *" is incompatible with parameter of type "const void *"

          icmp6_param_problem(p, ICMP6_PP_FIELD, &ip6hdr->_plen);

In order to make it compile, I need to update the parameter to accept __packed pointer (unaligned access).

void icmp6_param_problem(struct pbuf *p, enum icmp6_pp_code c, const __packed void *pointer);

Currently, as far as I can see, cc.h does not define a macro to cherry-pick function parameters to be __packed. Another option is to typecast to (char *), but that feels very dirty.

--

Stian Skjelstad