FreeRTOS heap_4.c cast error

Kernel
1

Recently I noticed FreeRTOS kernel added CMake support and I tried to add it as well in my project.

set(FREERTOS_PORT "GCC_ARM_CM3" CACHE STRING "" FORCE)
set( FREERTOS_HEAP "4" CACHE STRING "" FORCE)

FetchContent_Declare(freertos_kernel
  GIT_REPOSITORY https://github.com/FreeRTOS/FreeRTOS-Kernel.git
  GIT_TAG        V10.6.1)
FetchContent_MakeAvailable(freertos_kernel)
target_link_libraries(freertos_kernel PUBLIC freertos_config)

But after compilation it gives me the following error:

projectdir/build/_deps/freertos_kernel-src/portable/MemMang/heap_4.c:432:24: error: cast increases required alignment of target type [-Werror=cast-align]

pxFirstFreeBlock = ( BlockLink_t * ) pucAlignedHeap;

I have -Wcast-align in compile option flags.

The error disappears if I remove the option flag.

Should I trust it and suppress the compile flag for the freertos target?

Compiler version

arm-none-eabi-gcc.exe (GNU Arm Embedded Toolchain 10.3-2021.10) 10.3.1 20210824 (release)

Target MCU: Cortex-M4

2

What version of GCC are you using? Possible for you to share the project that we can use to repro this?

3

This PR addresses this Fix cast alignment warning in heap_4.c by kar-rahul-aws · Pull Request #771 · FreeRTOS/FreeRTOS-Kernel · GitHub
Can you apply this patch in your project, and see if it fixes your issue.

4

arm-none-eabi-gcc.exe (GNU Arm Embedded Toolchain 10.3-2021.10) 10.3.1 20210824 (release)