From 5e72802def98b9b3d22279ac5620d636289a66ca Mon Sep 17 00:00:00 2001
From: Chris Lamb <lamby@debian.org>
Date: Tue, 6 Aug 2019 14:48:46 +0100
Subject: Ensure that patchlevel.h always matches the version in
 debian/changelog.

---
 debian/rules | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/debian/rules b/debian/rules
index 57d1d2f..8c6893c 100755
--- a/debian/rules
+++ b/debian/rules
@@ -2,10 +2,14 @@
 
 DPKG_EXPORT_BUILDFLAGS = 1
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
-include /usr/share/dpkg/buildflags.mk
+include /usr/share/dpkg/default.mk
 
 CFLAGS += -DSHADOW_PWD
 
+ifeq (,$(findstring ^$(DEB_VERSION_UPSTREAM),^$(shell cut -d'"' -f2 patchlevel.h)))
+$(error (patchlevel.h out of sync with Debian version))
+endif
+
 %:
 	dh $@
 
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