RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ fcad5e16d7f86e1062b177586d466494fb9e27d0

Troy 50d1b2fc8c [libc] add some posix function comments		1 rok temu
..
compilers	156c4cead5 [iar] fix legacy macros will be added if cannot get the IAR version	1 rok temu
cplusplus	1b8654b98e Add GCC generalized atomic operation function	1 rok temu
posix	50d1b2fc8c [libc] add some posix function comments	1 rok temu
Kconfig	005828eba7 [nano] rt-thread susport nano option	2 lat temu
SConscript	005828eba7 [nano] rt-thread susport nano option	2 lat temu
posix-info.txt	3e59cfd70e update posix-info.txt	4 lat temu