title: STM32 interrupt handler multiply defined
body: <p>I want to use interrupt handlers</p>
  
  <pre><code>void EXTI3_IRQHandler(void)
  {
    //body
  }
  </code></pre>
  
  <p>but when I build the project, I get the following error:</p>
  
  <blockquote>
    <p>Symbol <code>EXTI3_IRQHandler</code> multiply defined (by stm32f10x_it.o and
    main.o)</p>
  </blockquote>
  
  <p>I have included library stm32f10x_exti.h</p>