use /usr/share/dpkg/buildtools.mk only if extant:
authormirabilos <tg@debian.org>
Sun, 29 Sep 2019 18:59:44 +0000 (20:59 +0200)
committermirabilos <mirabilos@evolvis.org>
Sun, 29 Sep 2019 18:59:44 +0000 (20:59 +0200)
commit4e6bd008ae2f70efcc47ad65a712a5697fedb95d
tree6f4a5924da970462e647b0b03bfb55e4398df676
parent72402b1f108feb66df57a7c2c83ac003c32bfc7a
use /usr/share/dpkg/buildtools.mk only if extant:

stretch and jessie lack it, and it’s not relevant for native builds
debian/changelog
debian/rules