Allow disabling pico_stdio function wrapping #1635
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This PR copies the approach used by pico_printf and applies it to pico_stdio to allow a developer to opt out of stdio printf/putchar/etc. wrappers. This is done with the use of a new function
pico_set_stdio_implementation
which works identically topico_set_printf_implementation
frompico_printf
.This enables a developer to opt out of stdio wrappers around the following functions:
Additionally, in
pico_stdio
'sstdio.c
, some additional#if/#endif
are applied to shut up compiler warnings about unused functions whenpico_printf
compiler implementation is in use.Fixes #1634