In the end it wasn't hardware problem. It was debian mirror problem. I have changed it and reinstalled gcc and libc6-dev, and it started working normally.
mirror was deb http://http.us.debian.org/debian/ unstable main now it is deb http://nl.arm.mirror.debian.net/debian unstable main -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
