printf float problem STM32CubeIDE VSCode Clang-Compiler

[fe3]

Extension 3.7.0
st-arm-clang 19.1.6+st.10

Hello,

I am using CubeIDE für VSCode.

I write programs for the STM32F756ZGTx. I have set ST Arm Clang as the compiler in CubeMX. Redirecting the output (printf()) via the serial debug interface is possible without any problems. When I try to output float or double values with printf(), I get some weird results.

printf() with integer float/double yields correct results for integer float/double wrong
printf() with float/double integer always leads to incorrect results

I repeated the experiment for double variables. The same problem occurs here as well.

#include "main.h"
#include <stdio.h>

extern UART_HandleTypeDef huart3;

double floatVar = 1.1f;

void mainThread(void)
{	
	printf("\r\n\nHello from Nucleo F756 - float Test\r\n"
		       "-----------------------------------\r\n");

	for(;;){ 
		printf("Float value: %f - Integer %u\r\n", floatVar, (unsigned int) floatVar);
		printf("Integer      %8u - Float value: %f\r\n",  (unsigned int) floatVar, floatVar);
        HAL_Delay(500);
        floatVar += 1.0f;
	}
}

int __io_putchar(int ch) {
	HAL_UART_Transmit(&huart3, (uint8_t*) &ch, 1, 100);
	return ch;
}

Variable type float

Hello from Nucleo F756 - float Test
-----------------------------------
Float value: 1.887500 - Integer 2684354560
Integer             1 - Float value: -0.000000
Float value: 2.012500 - Integer 3221225472
Integer             2 - Float value: -2.000000
Float value: 2.137500 - Integer 3221225472
Integer             3 - Float value: -2.000000
Float value: 2.256250 - Integer 1610612736
Integer             4 - Float value: 36893490000000000000.000000
Float value: 2.318750 - Integer 1610612736
Integer             5 - Float value: 36893490000000000000.000000
Float value: 2.381250 - Integer 1610612736
Integer             6 - Float value: 36893490000000000000.000000
Float value: 2.443750 - Integer 1610612736
Integer             7 - Float value: 36893490000000000000.000000

Variable type double

Hello from Nucleo F756 - float Test
-----------------------------------
Float value: 0.000000 - Integer 2684354560
Integer             1 - Float value: -0.000000
Float value: 0.000000 - Integer 3489660928
Integer             2 - Float value: -8589935000.000000
Float value: 0.000000 - Integer 3489660928
Integer             3 - Float value: -8589935000.000000
Float value: 0.000000 - Integer 1744830464
Integer             4 - Float value: 2417851600000000000000000.000000
Float value: 0.000000 - Integer 1744830464
Integer             5 - Float value: 2417851600000000000000000.000000
Float value: 0.000000 - Integer 1744830464
Integer             6 - Float value: 2417851600000000000000000.000000
Float value: 0.000000 - Integer 1744830464
Integer 

Please find enclosed the project.

What am I doing wrong? Is a linker or compiler option missing?

Thanks