modules: memfault: Check project key only when used to upload

In cases where an upstream device uploads data to Memfault on behalf
of a downstream device, the project key is not required. This change
allows the project key to be optional in those cases. For the
NCS Memfault sources, this is when we are not using MDS or the
Memfault Zephyr HTTP client.

Signed-off-by: Jan Tore Guggedal <[email protected]>

Author: jtguggedal

modules/memfault-firmware-sdk/memfault_integration.c

@@ -35,9 +35,11 @@ LOG_MODULE_REGISTER(memfault_ncs, CONFIG_MEMFAULT_NCS_LOG_LEVEL);
 #define MEMFAULT_URL	"https://goto.memfault.com/create-key/nrf"
 #endif
 
+#if defined(CONFIG_BT_MDS) || defined(CONFIG_MEMFAULT_HTTP_ENABLE)
 /* Project key check */
 BUILD_ASSERT(sizeof(CONFIG_MEMFAULT_NCS_PROJECT_KEY) > 1,
 	"Memfault Project Key not configured. Please visit " MEMFAULT_URL " ");
+#endif
 
 /* Firmware type check */
 BUILD_ASSERT(sizeof(CONFIG_MEMFAULT_NCS_FW_TYPE) > 1, "Firmware type must be configured");