samples: mss: Update to picolib

hostap now supports picolib, so we can switch to it.

Increase relevant stack sizes slightly to avoid stack
overflow on connect. Also remove unnecessary newlibc
requirement on NRF_CLOUD_JWT_SOURCE_CUSTOM

IRIS-7458

Signed-off-by: Georges Oates_Larsen <[email protected]>

Author: glarsennordic

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -250,6 +250,10 @@ Cellular samples
 
   * Added support for setting the FOTA update check interval using the config section in the shadow.
 
+* :ref:`nrf_cloud_multi_service` sample:
+
+  * Updated Wi-Fi overlays from newlibc to picolib.
+
 Cryptography samples
 --------------------
 

samples/cellular/nrf_cloud_multi_service/overlay_nrf7002ek_wifi_coap_no_lte.conf

@@ -62,7 +62,7 @@ CONFIG_WIFI_CREDENTIALS_SHELL=y
 CONFIG_TLS_CREDENTIALS_SHELL=y
 CONFIG_TLS_CREDENTIALS_BACKEND_PROTECTED_STORAGE=y
 # Increased stack size needed for wifi_cred auto_connect command
-CONFIG_SHELL_STACK_SIZE=4400
+CONFIG_SHELL_STACK_SIZE=4500
 # nRFCloud credentials can exceed 1024 bytes
 CONFIG_TLS_CREDENTIALS_SHELL_CRED_BUF_SIZE=3072
 # Needed by the TLS credentials shell
@@ -160,18 +160,13 @@ CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
 CONFIG_NET_MGMT_EVENT_QUEUE_SIZE=20
 CONFIG_APPLICATION_THREAD_STACK_SIZE=3072
 CONFIG_MESSAGE_THREAD_STACK_SIZE=3072
-CONFIG_CONNECTION_THREAD_STACK_SIZE=4096
+CONFIG_CONNECTION_THREAD_STACK_SIZE=4500
 CONFIG_DATE_TIME_THREAD_STACK_SIZE=2048
 CONFIG_NET_TX_STACK_SIZE=2048
 CONFIG_NET_RX_STACK_SIZE=2048
 CONFIG_POSIX_MAX_FDS=16
 CONFIG_NET_SOCKETS_POLL_MAX=8
 
-# Disable PICOLIBC since hostap currently is not compatible with it
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-CONFIG_PICOLIBC=n
-
 # nRF Cloud: CoAP
 CONFIG_NRF_CLOUD_MQTT=n
 CONFIG_NRF_CLOUD_COAP=y

samples/cellular/nrf_cloud_multi_service/overlay_nrf7002ek_wifi_no_lte.conf

@@ -61,7 +61,7 @@ CONFIG_WIFI_CREDENTIALS_SHELL=y
 CONFIG_TLS_CREDENTIALS_SHELL=y
 CONFIG_TLS_CREDENTIALS_BACKEND_PROTECTED_STORAGE=y
 # Increased stack size needed for wifi_cred auto_connect command
-CONFIG_SHELL_STACK_SIZE=4400
+CONFIG_SHELL_STACK_SIZE=4500
 # nRFCloud credentials can exceed 1024 bytes
 CONFIG_TLS_CREDENTIALS_SHELL_CRED_BUF_SIZE=2048
 # Needed by the TLS credentials shell
@@ -158,14 +158,9 @@ CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
 CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD_STACK_SIZE=8192
 CONFIG_APPLICATION_THREAD_STACK_SIZE=3072
 CONFIG_MESSAGE_THREAD_STACK_SIZE=3072
-CONFIG_CONNECTION_THREAD_STACK_SIZE=4096
+CONFIG_CONNECTION_THREAD_STACK_SIZE=4500
 CONFIG_DATE_TIME_THREAD_STACK_SIZE=2048
 CONFIG_NET_TX_STACK_SIZE=2048
 CONFIG_NET_RX_STACK_SIZE=2048
 CONFIG_POSIX_MAX_FDS=16
 CONFIG_NET_SOCKETS_POLL_MAX=8
-
-# Disable PICOLIBC since hostap currently is not compatible with it
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-CONFIG_PICOLIBC=n

subsys/net/lib/nrf_cloud/Kconfig

@@ -138,8 +138,7 @@ config NRF_CLOUD_JWT_SOURCE_CUSTOM
 	select TINYCRYPT_CTR_PRNG
 	select TINYCRYPT_AES
 	select CJSON_LIB
-	depends on NEWLIB_LIBC
-	depends on NEWLIB_LIBC_FLOAT_PRINTF
+	depends on NEWLIB_LIBC_FLOAT_PRINTF || PICOLIBC_IO_FLOAT
 	depends on DATE_TIME
 	help
 	  JWTs are created and signed by the nRF Cloud library, not the modem.