title: stm32 HAL library eclipse
body: <p>I´m using Eclipse IDE with ARM plugin to develop a project on my F4-Discovery. I created an empty template project and started to use functions from stm32 HAL libraries and I got error like:</p>
  <blockquote>
  <p>undefined reference to `HAL_DMA_Init'</p>
  <p>undefined reference to `HAL_UART_Init'</p>
  </blockquote>
  <p>Necessary .c and .h files are in the right directories, but Eclipse recognised only half of .c files and the others scratched out. <a href="http://s8.postimg.org/9v8v24n5h/stm32.png" rel="nofollow noreferrer">This image explains my problem.</a> What´s wrong? Thanks.</p>