iar: toolchain: enable VLA for IAR

Currently some subsystems outside the zephyr kernel
use VLA:s such as bluetooth. We will enable it for now
in the same kind of situations as gcc.

Signed-off-by: Robin Kastberg <robin.kastberg@iar.com>

Author: RobinKastberg

cmake/compiler/iar/target.cmake

@@ -81,6 +81,11 @@ if("${IAR_TOOLCHAIN_VARIANT}" STREQUAL "iccarm")
   )
 endif()
 
+# Enable VLA if CONFIG_MISRA_SANE is not set and warnings are not enabled.
+if(NOT CONFIG_MISRA_SANE AND NOT DEFINED W)
+  list(APPEND IAR_COMMON_FLAGS --vla)
+endif()
+
 # Minimal ASM compiler flags
 if("${IAR_TOOLCHAIN_VARIANT}" STREQUAL "iccarm")
   list(APPEND IAR_ASM_FLAGS

cmake/toolchain/iar/Kconfig.defconfig

@@ -3,9 +3,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
 
-config MISRA_SANE
-	default y
-
 config PICOLIBC_SUPPORTED
 	default n