what does extern means | Microcontroller › AVR › what does extern means This topic has 0 replies, 1 voice, and was last updated 12 years, 1 month ago by dagakshay. Viewing 1 post (of 1 total) Author Posts January 31, 2011 at 10:37 am #591 dagakshayParticipant i saw where one of the function was declared as extern void <funtion name> (<parameters>); what does extern mean Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In