ESP8266 Community Forum

- Fri Oct 07, 2022 6:57 pm #95347 Hi,

I am using the ESP8266_RTOS_SDK trying to write my first app.

I use the COMPONENT_EMBED_TXTFILES feature in the component.mk to embed some certificate (PEM).
The following code then embeds the certificate and corresponding key:

Code: Select allstatic uint8_t d_client_crt_start[] asm("_binary_client_crt_start");
static uint8_t client_crt_end[]   asm("_binary_client_crt_end");
static uint8_t client_key_start[] asm("_binary_client_key_start");
static uint8_t client_key_end[]   asm("_binary_client_key_end");


When I put this code in a .c file, it works flawlessly, however if this is in a .cpp file, i get the following
error during compilation:

Code: Select allapp.cpp:45:16: error: storage size of 'client_crt_start' isn't known
 static uint8_t client_crt_start[] asm("_binary_client_crt_start");
                ^~~~~~~~~~~~~~~~

For now, I have put the embedding code into a separate .c file but I really would like to have it
in the main app.cpp. I am unfamiliar with using gcc's asm(...) in C++, so I would appreciate
any help here.

Thanks
-Fritz

- Tue Oct 11, 2022 11:40 pm #95370 You can try this:

Code: Select allextern "C"
{

// your definitions here

}


- Wed Oct 12, 2022 4:09 am #95373 That was my first idea, but it produces the same error.
Sorry I forgot to mention it.

Thanks anyway