Problems with BLE Mesh in a C++ project.

RE: Problems with BLE Mesh in a C++ project.

AF1 — Sun, 01 Dec 2024 11:06:16 GMT

Thanks Jonathan
Appreciate the response.

RE: Problems with BLE Mesh in a C++ project.

JONATHAN LL — Tue, 26 Nov 2024 11:56:05 GMT

Adding some extra comment for clearity:

Yes it is only supported in C. The suggestion for anyone who wants to use .cpp is to create a .c file where they instantiate composition data and expose pointer to that composition data through a header file. Then use this pointer in main.cpp. Or, simpler, move the entire mesh initialization to a .c file and call some init function from main.cpp.

RE: Problems with BLE Mesh in a C++ project.

JONATHAN LL — Thu, 23 May 2024 11:40:07 GMT

There has been a discussion about this before it seems, ref: Bluetooth: Mesh: Make elements as const by LingaoM · Pull Request #57215 · zephyrproject-rtos/zephyr · GitHub

C++ syntax doesn't support compound literals. It is possible to use GNU extension to enable it for C++ but it has different semantic (https://gcc.gnu.org/onlinedocs/gcc/Compound-Literals.html).

As a consequence of mentioned above discussion the macros for C++ excluded : https://github.com/zephyrproject-rtos/zephyr/pull/58311

It is not possible to use them for C++ as is. So either customize them for C++ or find out another approach.

What could be proposed is:

We have already this issue as keys and groups are also initialized as compound literals. We propose surrounding this problematic defines with #ifndef __cplusplus. C++ users can have a C-file (compiled with a C-compiler) with these macros to define variables, and access them in C++ code using extern.

Regards,
Jonathan

RE: Problems with BLE Mesh in a C++ project.

JONATHAN LL — Thu, 23 May 2024 07:23:12 GMT

No update as of now, will ping internally to try and rush things along

RE: Problems with BLE Mesh in a C++ project.

AF1 — Thu, 23 May 2024 07:13:24 GMT

Any updates on my ticket??

RE: Problems with BLE Mesh in a C++ project.

JONATHAN LL — Wed, 15 May 2024 13:33:17 GMT

I have asked for this to be looked at infernally so that we can maybe try and find a more C++ friendly approached.

Regards,
Jonathan