RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ 19f311b4989c8d6ed7acaa3b625fa7e3a8a2168a

огледало од https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

wangfuan 19f311b498 [libc][delay] fix wrong usleep function		пре 2 година
..
SConscript	6369e89502 [posix] POSIX standard implementation for PSE51 (#5384)	пре 4 година
delay.c	19f311b498 [libc][delay] fix wrong usleep function	пре 2 година
delay.h	075e04e344 the support for PSE51 (#5534)	пре 4 година