cmake: Fix compilation flag for speed

Change the optimisation flag for speed from o2 to o3
(o3 needs licensed version of toolchain)

Signed-off-by: Muhammed Zamroodh <[email protected]>

Author: MuhammedZamroodh

boards/microchip/dspic33/dspic33a_curiosity/board.c

@@ -6,8 +6,9 @@
 #include <zephyr/init.h>
 #include <zephyr/kernel.h>
 
-/* Board level init for dspic33a_curiosity
- */
 void board_early_init_hook(void)
 {
+	/* Intentionally empty: This system dosent use Board level init.
+	 * Board level init for dspic33a_curiosity
+	 */
 }

boards/microchip/dspic33/dspic33a_curiosity/doc/index.rst

@@ -137,7 +137,7 @@ The XC-DSC toolchain hooks its optimization levels in
 ``cmake/compiler/xcdsc/compiler_flags.cmake`` by mapping Zephyr's generic
 properties to concrete compiler flags. In this file:
 
-* ``optimization_speed`` uses ``-O2``.
+* ``optimization_speed`` uses ``-O3``.
 * ``optimization_size`` uses ``-O2``.
 * ``optimization_size_aggressive`` uses ``-Os``.
 * ``optimization_debug`` uses ``-O1``.
@@ -155,7 +155,7 @@ To change that default, set one of these options in your application's
 - ``CONFIG_SIZE_OPTIMIZATIONS_AGGRESSIVE`` switches to ``optimization_size_aggressive``,
   which adds the ``-Os`` mapping described in ``compiler_flags.cmake``. This
   level is only available when your XC-DSC compiler is licensed.
-- ``CONFIG_SPEED_OPTIMIZATIONS`` selects ``optimization_speed`` (``-O2``).
+- ``CONFIG_SPEED_OPTIMIZATIONS`` selects ``optimization_speed`` (``-O3``).
 - ``CONFIG_DEBUG_OPTIMIZATIONS`` selects ``optimization_debug`` (``-O1``).
 - ``CONFIG_NO_OPTIMIZATIONS`` forces (``-O0``).
 

cmake/compiler/xcdsc/compiler_flags.cmake

@@ -2,7 +2,7 @@
 set_compiler_property(PROPERTY debug -g)
 # Optimization for debug builds
 set_compiler_property(PROPERTY optimization_debug -O1)
-set_compiler_property(PROPERTY optimization_speed -O2)
+set_compiler_property(PROPERTY optimization_speed -O3)
 # Optimize for size
 set_compiler_property(PROPERTY optimization_size -O2)
 set_compiler_property(PROPERTY optimization_size_aggressive -Os)

soc/microchip/dspic33/dspic33a/soc.c

@@ -6,8 +6,9 @@
 #include <zephyr/device.h>
 #include <zephyr/init.h>
 
-/* SOC level init for dspic33a family of chips
- */
 void soc_early_init_hook(void)
 {
+	/* Intentionally empty: This system dosent use SOC level init.
+	 * SOC level init for dspic33a family of chips
+	 */
 }