undefined reference to `__sync_synchronize'

Hi,

```
I Get this error:
opt/st/stm32cubeide_1.13.1/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.11.3.rel1.linux64_1.1.0.202305231506/tools/bin/../lib/gcc/arm-none-eabi/11.3.1/../../../../arm-none-eabi/bin/ld: /home/ros/CLionProjects/csmr/micro_ros_stm32cubemx_utils/microros_static_library_ide/libmicroros/libmicroros.a(librcutils-atomic_64bits.c.obj): in function `unlock_memory':
atomic_64bits.c:(.text+0xa0): undefined reference to `__sync_synchronize'
/opt/st/stm32cubeide_1.13.1/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.11.3.rel1.linux64_1.1.0.202305231506/tools/bin/../lib/gcc/arm-none-eabi/11.3.1/../../../../arm-none-eabi/bin/ld: /home/ros/CLionProjects/csmr/micro_ros_stm32cubemx_utils/microros_static_library_ide/libmicroros/libmicroros.a(librcutils-atomic_64bits.c.obj): in function `__atomic_load_8':
atomic_64bits.c:(.text+0x11c): undefined reference to `__sync_synchronize'
/opt/st/stm32cubeide_1.13.1/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.11.3.rel1.linux64_1.1.0.202305231506/tools/bin/../lib/gcc/arm-none-eabi/11.3.1/../../../../arm-none-eabi/bin/ld: /home/ros/CLionProjects/csmr/micro_ros_stm32cubemx_utils/microros_static_library_ide/libmicroros/libmicroros.a(librcutils-atomic_64bits.c.obj): in function `__atomic_store_8':
atomic_64bits.c:(.text+0x198): undefined reference to `__sync_synchronize'
/opt/st/stm32cubeide_1.13.1/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.11.3.rel1.linux64_1.1.0.202305231506/tools/bin/../lib/gcc/arm-none-eabi/11.3.1/../../../../arm-none-eabi/bin/ld: /home/ros/CLionProjects/csmr/micro_ros_stm32cubemx_utils/microros_static_library_ide/libmicroros/libmicroros.a(librcutils-atomic_64bits.c.obj): in function `__atomic_exchange_8':
atomic_64bits.c:(.text+0x214): undefined reference to `__sync_synchronize'
/opt/st/stm32cubeide_1.13.1/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.11.3.rel1.linux64_1.1.0.202305231506/tools/bin/../lib/gcc/arm-none-eabi/11.3.1/../../../../arm-none-eabi/bin/ld: /home/ros/CLionProjects/csmr/micro_ros_stm32cubemx_utils/microros_static_library_ide/libmicroros/libmicroros.a(librcutils-atomic_64bits.c.obj): in function `__atomic_fetch_add_8':
atomic_64bits.c:(.text+0x2a8): undefined reference to `__sync_synchronize'
```

How to resolve this error

Start by reproducing the linker failure with the reported STM32CubeIDE 1.13.1 ARM toolchain and inspect the link settings for libmicroros.a. Trace the references from librcutils-atomic_64bits.c.obj in atomic_64bits.c and compare the project’s atomic support with the selected target. Done means the STM32CubeMX project links successfully without the undefined references.

Written by the indexing model from the issue text.