RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ 64c1d626e2ccfe150cc4f9136c2f952dd2ff64f0

zhkag 33f550cb65 [Kernel] message 可以返回消息的实际大小 (#7709)		il y a 2 ans
..
delay	b9f5bf7d91 [libc]优化usleep函数	il y a 2 ans
io	b4e59bac4e dfs v2 修改 fd_new 的 startfd 起始值为 0 ；修复 futex_wait 超时时间换算异常； (#7705)	il y a 2 ans
ipc	33f550cb65 [Kernel] message 可以返回消息的实际大小 (#7709)	il y a 2 ans
libdl	93f3cb30e4 [kernel] 将rt_thread结构体改为显式继承rt_object (#7131)	il y a 2 ans
pthreads	c4002dea9f [doxygen][libc] Add some comments for posix pthread functions (#7467)	il y a 2 ans
signal	c33a21509a [comment][libc] add some comments for functions in posix_signal (#7647)	il y a 2 ans
Kconfig	be892de35a [posix] add RT_USING_POSIX_SOCKET (#5731)	il y a 3 ans
SConscript	b513d37cf2 [libc][posix] create 'posix' folder and move related files into it	il y a 4 ans
readme.md	31c3214faf [posix][io]整理posix/io文件夹 (#5539)	il y a 4 ans

This folder provides functions that are not part of the standard C library but are part of the POSIX.1 (IEEE Standard 1003.1) standard.

NOTE

For consistency of compilation results across the different of platforms(gcc, keil, iar) , use:
- #include <sys/time.h> to instead of #include <time.h>
- #include <sys/errno.h> to instead of #include <errno.h>
- #include <sys/signal.h> to instead of #include <signal.h>