[riot-notifications] [RIOT-OS/RIOT] TCP lwIP Error Connecting Sock Problem (#11910)

mmaxus35 notifications at github.com
Fri Jul 26 13:43:14 CEST 2019

> > By the way these are the warnings when i compile the program
> > ```
> > /data/riotbuild/RIOT-master/examples/tcp-simple-server/bin/esp32-wroom-32/lwip_api.a(tcpip.o): In function `tcpip_try_callback':
> > tcpip.c:(.text+0x32c): warning: undefined reference to `sys_mbox_trypost_fromisr'
> > /data/riotbuild/RIOT-master/examples/tcp-simple-server/bin/esp32-wroom-32/lwip_api.a(tcpip.o): In function `tcpip_send_msg_wait_sem':
> > tcpip.c:(.text+0x35e): warning: undefined reference to `sys_mbox_trypost_fromisr
> > ```
> BTW, I was trying to investige these undefined symbols a year ago, but I don't remeber what the problem was.

Thanks for your reply. In conclusion, I couldn't manage to run a TCP application using neither lwip nor gnrc in ESP32. As you mentioned, will ESP8266 able to run a TCP application? I am trying to catch up the TCP application to my thesis and conferance paper. 

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