debian/changelog

+grass (7.6.1-1~exp2) UNRELEASED; urgency=medium
+
+  * Update gbp.conf to use --source-only-changes by default.
+
+ -- Bas Couwenberg <sebastic@debian.org>  Sun, 07 Jul 2019 08:10:23 +0200
+
 grass (7.6.1-1~exp1) experimental; urgency=medium
 
   * New upstream release.
@@ -16,6 +22,12 @@ grass (7.6.1~rc1-1~exp1) experimental; urgency=medium
 
  -- Bas Couwenberg <sebastic@debian.org>  Sat, 09 Mar 2019 18:53:20 +0100
 
+grass (7.6.0-2) UNRELEASED; urgency=medium
+
+  * Define ACCEPT_USE_OF_DEPRECATED_PROJ_API_H for PROJ 6.0.0 compatibility.
+
+ -- Bas Couwenberg <sebastic@debian.org>  Sun, 14 Apr 2019 07:34:30 +0200
+
 grass (7.6.0-1) unstable; urgency=medium
 
   * Drop unused lintian override.

debian/gbp.conf

@@ -14,3 +14,6 @@ upstream-tag = upstream/%(version)s
 
 # Always use pristine-tar.
 pristine-tar = True
+
+[buildpackage]
+pbuilder-options = --source-only-changes

debian/rules

@@ -6,6 +6,9 @@
 # Enable hardening build flags
 export DEB_BUILD_MAINT_OPTIONS=hardening=+all
 
+# Workaround for proj_api.h deprecation in PROJ 6.0.0
+export DEB_CFLAGS_MAINT_APPEND=-DACCEPT_USE_OF_DEPRECATED_PROJ_API_H
+
 # Disable PIE on Ubuntu where it's still problematic
 VENDOR_DERIVES_FROM_UBUNTU ?= $(shell dpkg-vendor --derives-from Ubuntu && echo yes)
 DISTRIBUTION_RELEASE       := $(shell lsb_release -cs)