Problems using newlib C standard library

[listenYes]

Hi

Now I am using NCS1.7.1 for development the nRF52840 chip.I need to use the C standard library(math.h).I set up as follows:

/****************prj.conf****************/
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_NANO=y
CONFIG_NEWLIB_LIBC_ALIGNED_HEAP_SIZE=2048

There is no problem when the above macro definitions are not added to "nrf\samples\bluetooth\mesh\light_ctrl"  project.If adding and enable to project it will error.The reason is that this segment in my code reports error！

/*****************vendor_setting.c*********************/
static int handle_set(const char *name, size_t len, settings_read_cb read_cb,void *cb_arg)
{
    return 0;
}
static int handle_commit(void)
{
    return;
}
static int handle_export(int (*cb)(const char *name, const void *value, size_t val_len))
{
    return 0;
}

SETTINGS_STATIC_HANDLER_DEFINE(vendor, "vendor", NULL, handle_set, handle_commit, handle_export);

The error message is as follows：

Now I don't know what to do!

[Elfving]

Hello,

That is odd. I don't seem to be able to reproduce this, though are you getting the same result with a basic example like Hello World?

Regards,

Elfving

[listenYes]

At the configure the "CONFIG_NEWLIB_LIBC=y",you can try to add the code like “#include <math.h>”, to the main.c file.But when you try to open the header file, SES will pop message "Can`t open for reading".

[Elfving]

Could you try including 

#include <zephyr.h>

in your test_settings.c file? That works on my side.

Regards,

Elfving