fixed some LTO issues

CMakeLists.txt

@@ -70,7 +70,7 @@ add_compile_options(
     -Wextra
     -Wpedantic
     -Wno-unused-parameter
-   -flto
+    -flto=8
 )
 
 add_link_options(
@@ -86,7 +86,7 @@ add_link_options(
     -lstdc++
     -lsupc++
     -Wl,--end-group
-    -flto
+    -flto=8
     -Wl,-z,max-page-size=8 # Allow good software remapping across address space (with proper GCC section making)
     -Wl,--print-memory-usage
 )

Core/Inc/FreeRTOSConfig.h

@@ -166,6 +166,8 @@ standard names. */
 
 #define USE_CUSTOM_SYSTICK_HANDLER_IMPLEMENTATION 0
 
+#define portDONT_DISCARD  __attribute__((used))
+
 /* USER CODE BEGIN Defines */
 /* Section where parameter definitions can be added (for instance, to override default ones in FreeRTOS.h) */
 /* USER CODE END Defines */

STM32H723VGTX_FLASH.ld

@@ -43,12 +43,12 @@ _Min_Stack_Size = 0x400; /* required amount of stack */
 /* Specify the memory areas */
 MEMORY
 {
-  ITCMRAM (xrw)    : ORIGIN = 0x00000000,   LENGTH = 64K
-  DTCMRAM (xrw)    : ORIGIN = 0x20000000,   LENGTH = 128K
+  ITCMRAM (rw)    : ORIGIN = 0x00000000,   LENGTH = 64K
+  DTCMRAM (rw)    : ORIGIN = 0x20000000,   LENGTH = 128K
   FLASH    (rx)    : ORIGIN = 0x08000000,   LENGTH = 1024K
-  RAM_D1  (xrw)    : ORIGIN = 0x24000000,   LENGTH = 320K
-  RAM_D2  (xrw)    : ORIGIN = 0x30000000,   LENGTH = 32K
-  RAM_D3  (xrw)    : ORIGIN = 0x38000000,   LENGTH = 16K
+  RAM_D1  (rw)    : ORIGIN = 0x24000000,   LENGTH = 320K
+  RAM_D2  (rw)    : ORIGIN = 0x30000000,   LENGTH = 32K
+  RAM_D3  (rw)    : ORIGIN = 0x38000000,   LENGTH = 16K
 }
 
 /* Define output sections */