Arduino for STM32

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#include "stm32f1xx.h"
#include "stm32f1xx_ll_bus.h"
#include "stm32f1xx_ll_gpio.h"
#include "stm32f1xx_ll_utils.h"
#include "stm32f1xx_ll_rcc.h"
#include "stm32f1xx_ll_system.h"

void setupClock(void) {
  // 72MHz from 8MHz HSE
  LL_UTILS_PLLInitTypeDef pll;
  pll.Prediv = LL_RCC_PREDIV_DIV_1; // 8MHz / 1 = 8MHz
  pll.PLLMul = LL_RCC_PLL_MUL_9;    // 8MHz * 9 = 72MHz
  LL_UTILS_ClkInitTypeDef clk;
  clk.AHBCLKDivider = LL_RCC_SYSCLK_DIV_1;
  clk.APB1CLKDivider = LL_RCC_APB1_DIV_2;
  clk.APB2CLKDivider = LL_RCC_APB2_DIV_1;
  // configure clock
  LL_PLL_ConfigSystemClock_HSE(8000000,LL_UTILS_HSEBYPASS_OFF,&pll,&clk);
  SystemCoreClockUpdate();
  Serial.print("SystemCoreClock: ");
  Serial.println(SystemCoreClock);
}

void setupDMA(void) {}
void setupI2C(void) {}

void setup() {
  Serial.begin(115200);
  setupClock();
  // spočítej a uož frekvence SYSCLK,AHB a APB do struktury "clocks"
  LL_RCC_ClocksTypeDef clocks; // <-- !!! this line is causing error
  LL_RCC_GetSystemClocksFreq(&clocks); // <-- !!! this line too
  setupI2C();
  setupDMA();
}

void loop() {
  Serial.print(".");
  delay( 1000 );
}