RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ e6e90629773897394e99a156cf76756b883ff86d

guo 160d448660 Merge pull request #5051 from mysterywolf/be_libc		4 anni fa
..
none-gcc	c48445a5f7 [标准化libc] fix CI warning	4 anni fa
sys	160d448660 Merge pull request #5051 from mysterywolf/be_libc	4 anni fa
SConscript	56e3571e8a implement delay.c/.h	4 anni fa
delay.c	56e3571e8a implement delay.c/.h	4 anni fa
delay.h	56e3571e8a implement delay.c/.h	4 anni fa
dirent.h	dd9db58a86 优化dfs.h和dirent.h的包含关系	4 anni fa
fcntl.h	8da9f78d72 [libc] remove rtlibc	4 anni fa
poll.h	c360688714 使用poll.h代替dfs_poll.h	4 anni fa
readme.md	f9ba41f4c2 更改libc目录为common 以及 none-gcc	4 anni fa
stdlib.c	3c05a4e719 [compoenets] auto & manual formatted	4 anni fa
termios.h	3c05a4e719 [compoenets] auto & manual formatted	4 anni fa
time.c	19c5088bb8 [libc][time] 修复posix相关函数没有进行临界区保护的问题	4 anni fa
unistd.c	6697fa0ff5 [sleep] 加入调度器尚未运行时的延时情况	4 anni fa

Attentions

This folder is "common" for all toolchains.
If you want to add new .c files, please do not forget to fix SConscript file too. eg:
```
if GetDepend('RT_USING_POSIX') == False:
    SrcRemove(src, ['unistd.c'])
```