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 年之前
..
sys	c0257098b9 release rt-thread v4.0.3	4 年之前
SConscript	c0257098b9 release rt-thread v4.0.3	4 年之前
readme.md	c0257098b9 release rt-thread v4.0.3	4 年之前
termios.h	c0257098b9 release rt-thread v4.0.3	4 年之前
time.c	c0257098b9 release rt-thread v4.0.3	4 年之前
unistd.c	c0257098b9 release rt-thread v4.0.3	4 年之前

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'])
```