Update to latest platform.

platformio.ini

@@ -18,7 +18,7 @@ boards_dir = zephyr/boards
 
 framework = zephyr
 
-platform = ststm32@15.2.0
+platform = ststm32@15.4.1
 
 # Serial monitor baud rate
 monitor_speed = 115200
@@ -29,11 +29,6 @@ build_flags =
     -fsingle-precision-constant
     -Wl,-Map,memory.map
 
-# Below flags are only valid for C++ and create warnings for C files, so we add them as
-# CXXFLAGS in extra_script.
-build_unflags = -Wno-register -fno-rtti
-extra_scripts = zephyr/platformio-extra.py
-
 #### BOARD-SPECIFIC DEFINITIONS ###############################################
 
 [env:nucleo_g474re]

zephyr/platformio-extra.py

-
-# Custom settings, as referred to as "extra_script" in platformio.ini
-#
-# See https://docs.platformio.org/en/latest/projectconf/section_env_advanced.html#extra-scriptss
-
-Import("env")
-
-env.Append( CXXFLAGS=[ "-Wno-register -fno-rtti" ] )