STMicroelectronics STM32 - Figure 60. Properties for Semihosting in Stm32 Cubeide- Source Location; Stm32 Cubeide

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7.4.3 STM32CubeIDE
Set linker parameters
First the linker must ignore the default syscalls.c file and has to use the newlib-nano
librairies, which contains printf() function.
in Project -> Properties -> C/C++ General -> Paths and Symbol
Click on the Source Location tab. Click on the arrow near to “[Project name]/Core”, and
select “Filter(empty)”.
Then click on “Edit filter” button and add “syscall.c” to the Exclusion patterns list.
Figure 60. Properties for semihosting in STM32CubeIDE- Source Location
To use semihosting the librdimon must be enabled. Librdimon implements the semihosting
versions of syscalls from newlib.
On the left-side pane, go into C/C++ Build -> Settings and select the Tool Settings tab.
Then, select MCU GCC Linker -> Libraries. In the libraries pane, click the “Add” button and
enter rdimon.