CBPRINTF_FP_SUPPORT does not work after NEWLIB_LIBC enabled

[kclauah]

Describe the bug
Terminal unable to print float value if these two config enabled.

CONFIG_NEWLIB_LIBC=y 
CONFIG_CBPRINTF_FP_SUPPORT=y

If CBPRINTF_FP_SUPPORT is set only, it can correctly print float to terminal.
I found out this issue when I testing samples/sensor/lsm6dso on nrf52dk_nrf528322.
I think this issue is related to #37777

To Reproduce
Steps to reproduce the behavior:

1. Create a new project with these config.

CONFIG_CBPRINTF_FP_SUPPORT=y
CONFIG_NEWLIB_LIBC=y

2. Add the following code.

float test_float = 1.23;
printf("float: %f\n",test_float);

3. See the result on terminal

Expected behavior
Terminal print blank if CONFIG_NEWLIB_LIBC=y & CONFIG_CBPRINTF_FP_SUPPORT=y

float: 

It can correctly print float if remove CONFIG_NEWLIB_LIBC

float: 1.230000

Impact
I have to replaced all printf with printk in order to show float on terminal.

Logs and console output

Environment (please complete the following information):

• OS: Windows 10 64-bit
• Toolchain Zephyr SDK 2.6.0.rc-1

Additional context

[stephanosio]

When newlib is enabled, printf is implemented by the newlib (and not by the cbprintf).

Please make sure that CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y.

[kclauah]

Thank you, your solution works.
I just found out that newlib has its own implementation of printf and enabling newlib override cbprintf.
Sorry for the dumb question.

[stephanosio]

No problem. This can be quite confusing to the people who are new to Zephyr.

Closing since the question has been answered.