RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ 2c885336592b747fbad13c23c656934ec2913f72

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Bernard Xiong 87171f003c [LIBC] code cleanup		11 anni fa
..
SConscript	802c768475 [LIBC] Use RT_USING_LIBC instead of libs option for each compiler	11 anni fa
mem_std.c	4ee93b7552 [libc] Fix system issue when use msh and make code cleanup.	11 anni fa
stubs.c	87171f003c [LIBC] code cleanup	11 anni fa