error,when build the interrupt.c in ds-5

Hi,

Actually I am a beginner in using ds-5 to learn the HPS. Currently I am having some trouble in trying the interrupt code.

This is a simple interrupt code.

...

mian()

{...

socfpga_int_start();

...

alt_int_isr_register(.....);

...

socfpga_int_stop();

...

}

some error show this:

http://www.alteraforum.com/forum/attachment.php?attachmentid=10324&stc=1