File content as of revision 0:616601bde9fb:

/*
 * Author: Adam Dunkels <adam@sics.se>
 *
 */
#ifndef __LWIP_ARCH_CC_H__
#define __LWIP_ARCH_CC_H__
#include <mbed.h>

#define LITTLE_ENDIAN 1234

#define BYTE_ORDER  LITTLE_ENDIAN

typedef unsigned char   u8_t;
typedef signed char     s8_t;
typedef unsigned short  u16_t;
typedef signed short    s16_t;
typedef unsigned int    u32_t;
typedef signed int      s32_t;
typedef unsigned int    mem_ptr_t;

#ifndef NULL
#define NULL 0
#endif

#ifndef TRUE
#define TRUE 1
#endif

#ifndef FALSE
#define FALSE 0
#endif

#define LWIP_RAND rand

#define LWIP_PLATFORM_DIAG(x) printf x
#define LWIP_PLATFORM_ASSERT(x) error(x)

#define LWIP_PROVIDE_ERRNO

#ifdef __GNUC__
    /* printf() format specifiers used by GCC. */
    #define U16_F "hu"
    #define S16_F "hd"
    #define X16_F "hx"
    #define U32_F "u"
    #define S32_F "d"
    #define X32_F "x"
#else /* !__GNUC__ */
    /* printf() format specifiers used by ARM compiler. */
    #define U16_F "hu"
    #define S16_F "hd"
    #define X16_F "hx"
    #define U32_F "lu"
    #define S32_F "ld"
    #define X32_F "lx"
#endif /* __GNUC__ */

#if 0 
/*Create compilation problems, and according to http://www.mail-archive.com/lwip-users@nongnu.org/msg06786.html, 
lwIP uses packed structures, so packing the field is not really a good idea ;) */
#define PACK_STRUCT_FIELD(x) __packed x
#else 
#define PACK_STRUCT_FIELD(x)    x
#endif

#ifdef __GNUC__
    /* Packing for structs in GCC. */
    #define PACK_STRUCT_STRUCT __attribute__((packed))
    #define PACK_STRUCT_BEGIN
    #define PACK_STRUCT_END
#else /* !__GNUC__ */
    /* Packing for structs in ARM compiler. */
    #define PACK_STRUCT_STRUCT
    #define PACK_STRUCT_BEGIN __packed
    #define PACK_STRUCT_END
#endif /* __GNUC__ */

#define LWIP_CHKSUM_ALGORITHM 3


#endif /* __LWIP_ARCH_CC_H__ */