[lwip-users] dereferencing pointer to incomplete type in static LwIP library

[Martin Osterloh]

Hello all,

I am new to LwIP and just started to play around with it. I wrote a makefile to put LwIP into a static library. Compiling is no problem. My sys_arch is not 100% complete yet (I still have to map mailboxes).

However, I wrote a sample program to test LwIP. I can call sys_init() or lwip_init() without problems.

If I try to do:

struct tcp_pcb *pcb;

pcb->remote_port = 1024;

for example, I get dereferencing errors. It seems that my program does not know anything about LwIP internals (but I can call lwip_init() etc).

I use 

gcc lwip_test.c -o lwip_test -llwip 

to compile. The liblwip.a is in the same directory as the lwip_test.c.

Any ideas on this?

Thanks,

-Martin