How I can use #if define for checking major version of lwip?

[TridentTD]

Is there any #define for seperating lwip v1.4 and lwip2?

Thank you.

[d-a-v]

yes

#include <lwip/init.h>
#if LWIP_VERSION_MAJOR == 2

#warning v2
const int v = 2;

#elif LWIP_VERSION_MAJOR == 1

#warning v1
const int v = 1;

#else
#error LWIP_VERSION_MAJOR not defined
#endif

[TridentTD]

Thank you @d-a-v