This makes RIOT use the integer-only printf/scanf code by default and
includes a new make parameter to select the full floating point
version. This saves about 6kB of text space when building hello-world
for the microbit board.
Signed-off-by: Keith Packard <keithp@keithp.com>
----
v2:
Use USEMODULE=printf_float instead of separate parameter
Support for picolibc as alternative libc implementation is added with
this commit. For now only cortex-m CPU's are supported.
Enable via PICOLIBC=1
---
v2:
squash fixes in
v3:
Remove picolibc integer printf/scanf stuff from sys/Makefile.include,
it gets set in makefiles/libc/picolibc.mk
fixup for dependency
