[Bug report] nrf cloud headers not working for C++

RE: [Bug report] nrf cloud headers not working for C++

Pascal Hdz — Fri, 03 Oct 2025 11:34:58 GMT

The missing bracket are now merged to the latest NCS but the remaining fixes will come later as we need to adjust our internal setup. Thanks for sharing, if there is nothing else left, we can close this ticket.

RE: [Bug report] nrf cloud headers not working for C++

Nicholas Braaten — Tue, 30 Sep 2025 10:44:48 GMT

Not sure if this is sufficient for this exact sample (I tried to build the sample out of the box now, but fail), but I do atleast have these Kconfigs:

CONFIG_NEWLIB_LIBC=y
CONFIG_CPP=y
CONFIG_GLIBCXX_LIBCPP=y

and rename main.c to main.cpp

RE: [Bug report] nrf cloud headers not working for C++

Pascal Hdz — Tue, 30 Sep 2025 10:16:14 GMT

Which extra Kconfig variables did you enable?

RE: [Bug report] nrf cloud headers not working for C++

Nicholas Braaten — Tue, 30 Sep 2025 10:12:18 GMT

I used https://github.com/nrfconnect/sdk-nrf/tree/v3.2.0-preview1/samples/cellular/nrf_cloud_coap_fota as a starting point

RE: [Bug report] nrf cloud headers not working for C++

Pascal Hdz — Tue, 30 Sep 2025 09:00:33 GMT

Ok, did you based your implementation in a sample or application? I could try to reproduce these errors then.

RE: [Bug report] nrf cloud headers not working for C++

Nicholas Braaten — Tue, 30 Sep 2025 06:03:53 GMT

Hi, thanks for the follow up.

Regarding the libraries I had to include before including nrf_cloud_coap.h, is because of the inclusion of <cbprintf_cxx.h> furher down in the chain in <nrf_cloud_coap.h>. Because of the

#ifdef __cplusplus
extern "C" {
#endif

before the includes in <nrf_cloud_coap.h>, this won't work when compiling for C++ because of the templates used in <cbprintf_cxx.h>. They can't be compiled with C-linkage.

That is the reason for including them before including <nrf_cloud_coap.h>, so they will be included with C++ name mangling. It's just a hacky solution.

Btw; when compiling for C++, you will also find some other errors in some macros that is initializing structs in wrong order.

RE: [Bug report] nrf cloud headers not working for C++

Pascal Hdz — Mon, 29 Sep 2025 13:30:43 GMT

Hello Nicholas,

Thanks for taking the time for reporting this. Indeed this is an area of improvement in our test setup that we will look to address in the short term. The fix for the missing brackets is under review now and I found it in another library, so both should be fine soon.

Regarding the libraries that you recommend to add to nrf_cloud_coap.h, seems to me that these are impacting the application more than the library, could you expand why you came up with these libraries in specific?

Regards,

Pascal.

RE: [Bug report] nrf cloud headers not working for C++

dejans — Thu, 25 Sep 2025 13:43:57 GMT

Hi,

We will look into this during next week. I expect to get back to you by the end of next week.

Best regards,
Dejan

RE: [Bug report] nrf cloud headers not working for C++

dejans — Wed, 24 Sep 2025 11:26:43 GMT

Hi,

Thank you for reporting these potential bugs. We will look into these issues internally. I expect to get back to you by the end of the week.

Best regards,
Dejan