RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ a00a463248bc66cff04e098c2440e90bf7ea273e

Meco Man 8fee8d2c8c remove const in set_timeval		4 gadi atpakaļ
..
none-gcc	cb7fa8fcea implement pid_t gettid(void)	4 gadi atpakaļ
sys	1a55702ccb 修复DST_NONE 等宏定义位置放错导致报错的问题	4 gadi atpakaļ
SConscript	ae66d82624 update sconscript	4 gadi atpakaļ
dirent.h	f9ba41f4c2 更改libc目录为common 以及 none-gcc	4 gadi atpakaļ
readme.md	f9ba41f4c2 更改libc目录为common 以及 none-gcc	4 gadi atpakaļ
stdlib.c	3c05a4e719 [compoenets] auto & manual formatted	4 gadi atpakaļ
termios.h	3c05a4e719 [compoenets] auto & manual formatted	4 gadi atpakaļ
time.c	8fee8d2c8c remove const in set_timeval	4 gadi atpakaļ
unistd.c	19347ed454 [libc][unistd] 完善isatty()	4 gadi atpakaļ

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'])
```