applications: machine_learning: Change Newlib to Picolibc.

dchat-nordic · nordicjm · commit 0dcfa2daf5b3 · 2025-08-14T14:21:54.000+01:00
Change the default libc from Newlib to Picolibc.

Jira: NCSDK-33730

Signed-off-by: Dominik Chat &lt;dominik.chat@nordicsemi.no&gt;
diff --git a/applications/machine_learning/configuration/nrf52840dk_nrf52840/prj.conf b/applications/machine_learning/configuration/nrf52840dk_nrf52840/prj.conf
@@ -87,8 +87,6 @@ CONFIG_CONSOLE=n
 CONFIG_UART_CONSOLE=n
 CONFIG_LOG_BACKEND_UART=n
 CONFIG_UART_ASYNC_API=y
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
 
 ################################################################################
 # Debug configuration (logger using RTT)
diff --git a/applications/machine_learning/configuration/nrf52840dk_nrf52840/prj_nus.conf b/applications/machine_learning/configuration/nrf52840dk_nrf52840/prj_nus.conf
@@ -132,10 +132,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI nRF52840"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 ################################################################################
 # Debug configuration (logger using RTT)
 
diff --git a/applications/machine_learning/configuration/nrf52840dk_nrf52840/prj_release.conf b/applications/machine_learning/configuration/nrf52840dk_nrf52840/prj_release.conf
@@ -84,5 +84,3 @@ CONFIG_SENSOR=y
 CONFIG_CONSOLE=n
 CONFIG_UART_CONSOLE=n
 CONFIG_UART_ASYNC_API=y
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
diff --git a/applications/machine_learning/configuration/nrf5340dk_nrf5340_cpuapp/prj.conf b/applications/machine_learning/configuration/nrf5340dk_nrf5340_cpuapp/prj.conf
@@ -113,8 +113,6 @@ CONFIG_CONSOLE=n
 CONFIG_UART_CONSOLE=n
 CONFIG_LOG_BACKEND_UART=n
 CONFIG_UART_ASYNC_API=y
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
 
 CONFIG_BT=y
 CONFIG_BT_SMP=y
diff --git a/applications/machine_learning/configuration/nrf54h20dk_nrf54h20_cpuapp/prj.conf b/applications/machine_learning/configuration/nrf54h20dk_nrf54h20_cpuapp/prj.conf
@@ -114,8 +114,6 @@ CONFIG_CONSOLE=y
 CONFIG_SERIAL=y
 CONFIG_UART_CONSOLE=y
 CONFIG_UART_ASYNC_API=y
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
 
 CONFIG_BT_L2CAP_TX_MTU=498
 CONFIG_BT_BUF_ACL_TX_SIZE=251
diff --git a/applications/machine_learning/configuration/nrf54h20dk_nrf54h20_cpuapp/prj_release_singlecore.conf b/applications/machine_learning/configuration/nrf54h20dk_nrf54h20_cpuapp/prj_release_singlecore.conf
@@ -105,9 +105,6 @@ CONFIG_GPIO=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
 
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 CONFIG_SENSOR=y
 CONFIG_ADXL362=y
 CONFIG_ADXL362_ACCEL_RANGE_8G=y
diff --git a/applications/machine_learning/configuration/nrf54h20dk_nrf54h20_cpuapp/prj_singlecore.conf b/applications/machine_learning/configuration/nrf54h20dk_nrf54h20_cpuapp/prj_singlecore.conf
@@ -119,8 +119,6 @@ CONFIG_CONSOLE=y
 CONFIG_SERIAL=y
 CONFIG_UART_CONSOLE=y
 CONFIG_UART_ASYNC_API=y
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
 
 CONFIG_BT_L2CAP_TX_MTU=498
 CONFIG_BT_BUF_ACL_TX_SIZE=251
diff --git a/applications/machine_learning/configuration/nrf54l15dk_nrf54l15_cpuapp/prj.conf b/applications/machine_learning/configuration/nrf54l15dk_nrf54l15_cpuapp/prj.conf
@@ -88,8 +88,6 @@ CONFIG_CONSOLE=n
 CONFIG_UART_CONSOLE=n
 CONFIG_LOG_BACKEND_UART=n
 CONFIG_UART_ASYNC_API=y
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
 
 ################################################################################
 # Debug configuration (logger using RTT)
diff --git a/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp/prj.conf b/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp/prj.conf
@@ -137,10 +137,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI Thingy53"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 ################################################################################
 # Debug configuration (logger using CDC ACM)
 
diff --git a/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp/prj_release.conf b/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp/prj_release.conf
@@ -136,10 +136,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI Thingy53"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 CONFIG_BOARD_SERIAL_BACKEND_CDC_ACM=n
 
 ################################################################################
diff --git a/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp/prj_rtt.conf b/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp/prj_rtt.conf
@@ -143,10 +143,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI Thingy53"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 ################################################################################
 # Debug configuration (logger using RTT)
 
diff --git a/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp_ns/prj.conf b/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp_ns/prj.conf
@@ -137,10 +137,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI Thingy53"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 ################################################################################
 # Debug configuration (logger using CDC ACM)
 
diff --git a/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp_ns/prj_release.conf b/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp_ns/prj_release.conf
@@ -136,10 +136,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI Thingy53"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 CONFIG_BOARD_SERIAL_BACKEND_CDC_ACM=n
 
 ################################################################################
diff --git a/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp_ns/prj_rtt.conf b/applications/machine_learning/configuration/thingy53_nrf5340_cpuapp_ns/prj_rtt.conf
@@ -143,10 +143,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=y
 
 CONFIG_BT_DEVICE_NAME="EI Thingy53"
 
-# Required by EI data forwarder
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-
 ################################################################################
 # Debug configuration (logger using RTT)
 
diff --git a/applications/machine_learning/src/modules/Kconfig.ei_data_forwarder b/applications/machine_learning/src/modules/Kconfig.ei_data_forwarder
@@ -6,8 +6,8 @@
 
 menuconfig ML_APP_EI_DATA_FORWARDER
 	bool "Edge Impulse data forwarder"
-	depends on NEWLIB_LIBC
-	depends on NEWLIB_LIBC_FLOAT_PRINTF
+	depends on PICOLIBC
+	depends on PICOLIBC_IO_FLOAT
 	depends on CAF_SENSOR_EVENTS
 
 if ML_APP_EI_DATA_FORWARDER
diff --git a/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst b/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst
@@ -213,7 +213,7 @@ nRF Desktop
 nRF Machine Learning (Edge Impulse)
 -----------------------------------
 
-|no_changes_yet_note|
+* Updated the application to change the default libc from the :ref:`zephyr:c_library_newlib` to the :ref:`zephyr:c_library_picolibc` to align with the |NCS| and Zephyr.
 
 Serial LTE modem
 ----------------
