[lwip-users] Re: pack macros.

[David Haas]

Hi Igor,

I am CCing the list (which you should generally use for LWIP-related 
questions).

The answer is that cc.h needs to be written for the specific compiler. I 
would find your compiler's operation definitely unusual and quite 
frankly unlikely, since it means that you can't have any macros within 
the preprocessor statements. What compiler is it?

David.


Igor Auzokoa wrote:

> Hello David,
> My compiler manual says that the preprocessor lines are recognized an
> carried out before macro expansion. therefore, if a macro expands into
> something that looks like a preprocessor command, that command is not
> recognized by the preprocessor.
> In your cc.h file appears those macro definitions:
> /* Compiler hints for packing structures */
> #define PACK_STRUCT_BEGIN #pragma pack(1,1,0)
> #define PACK_STRUCT_STRUCT
> #define ALIGN_STRUCT_8_BEGIN #pragma pack(1,8,0)
> #define ALIGN_STRUCT_END #pragma pack()
> #define PACK_STRUCT_END #pragma pack()
> and when pass the compiler it has errors in ip_addr.h, tcp.h... files that
> use those macros.
> How do you resolve this problem?.
>
> Kind regards, Igor.
>
>
>