I just confirmed this issue on arm64 (building raptor for the first time). Removing the autoreconf.mk line from debian/rules lets it build. So the shipped ./configure is OK, but the one generated by the autoreconf isn't.
I've not yet investigated further. Wookey -- Principal hats: Linaro, Emdebian, Wookware, Balloonboard, ARM http://wookware.org/ -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org