Instead of forcing use of NEWLIB_LIBC, select any available complete C
library implementation. Add CONFIG_REQUIRES_FLOAT_PRINTF where needed.
Signed-off-by: Keith Packard <keithp@keithp.com>
The malloc arena/heap size setting can be adjusted using different
Kconfig options, depending on the libc implementation. This means
prj.conf can't be used to set this value on projects that can be built
for multiple libcs without generating a Kconfig warning.
Note: similar fix was applied for the hash_map sample, see
7ef8911e8c
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
