RT-Thread-Studio/sdk-rt-thread-source-code: https://github.com/RT-Thread-Studio/sdk-rt-thread-source-code.git @ v4.0.3

yaxing.chen c0257098b9 release rt-thread v4.0.3		4 gadi atpakaļ
..
sys	c0257098b9 release rt-thread v4.0.3	4 gadi atpakaļ
SConscript	c0257098b9 release rt-thread v4.0.3	4 gadi atpakaļ
readme.md	c0257098b9 release rt-thread v4.0.3	4 gadi atpakaļ
termios.h	c0257098b9 release rt-thread v4.0.3	4 gadi atpakaļ
time.c	c0257098b9 release rt-thread v4.0.3	4 gadi atpakaļ
unistd.c	c0257098b9 release rt-thread v4.0.3	4 gadi atpakaļ

Attentions

This folder is "common" for armlibc newlibc and dlib. It's not "common" for minilibc.
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'])
```