RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ v5.0.0

guozhanxin abfaa4bc4e [net] fix LWIP_HOOK_IP4_ROUTE_SRC define		пре 3 година
..
arch	577d619d4c [net][lwip] Support windows simulator (#5993)	пре 3 година
netif	b2fa700c2a [lwip] integrate and improve lwipopts.h (#5613)	пре 4 година
README.md	6895da5307 [net] adjust folder structure (#5587)	пре 4 година
SConscript	e96e3e07f5 [lwip] integrate lwip porting layer (#5606)	пре 4 година
ethernetif.c	52cb2f0b7e [lwIP] apply AF_UNIX feature (#6954)	пре 3 година
lwipopts.h	abfaa4bc4e [net] fix LWIP_HOOK_IP4_ROUTE_SRC define	пре 3 година
lwippools.h	b2fa700c2a [lwip] integrate and improve lwipopts.h (#5613)	пре 4 година
sys_arch.c	99bdf978d7 [rtdef] use lower-case to define attributes (#6728)	пре 3 година

This folder is common for LWIP.