Undefined reference to `_sbrk'

[ArneLaug]

Hi

I am trying to test a HR project “out-of-the-box”.

I use the NRF52832__XXAA template. Compiling seems to be fine, excepts that I had to add: -mfpu=fpv4-sp-d16.

When It comes to loading a got a problem that I don’t understand. This is the error message:

“1>c:/gcc/gcc-arm-none-eabi-5_4-2016q3-20160926-win32/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/lib/armv7e-m/fpu\libc.a(lib_a-sbrkr.o): In function `_sbrk_r’:
1>sbrkr.c : error : undefined reference to `_sbrk'”

Any idea how I can fix this?

Regards Arne

 

[support]

Hi,

Please open VisualGDB Project Properties and check the “Provide default stubs for system calls” checkbox on the first page. This will include default implementations for functions like _sbrk() to your project.

[ArneLaug]

Hi

Sorry I couldn’t find the “Provide default stubs for system calls” checkbox on the first page (or any other pages).

Please see the attached image.

Arne

 

[support]

Hi,

Looks like the image did not get uploaded properly. Could you please try attaching it to the post via the “attachments” button below?

[Author]

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