Update the build rules for .deb based builds

With this we also give up on building daily builds on Ubuntu 12.04
The cmake based infrastructure very much assumes Qt5 at this point.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

packaging/ubuntu/debian/rules

@@ -3,10 +3,11 @@
 
 # Uncomment this to turn on verbose mode.
 export DH_VERBOSE=1
-
+export DEB_BUILD_OPTIONS+=nocheck
+export DEB_CMAKE_INSTALL_PREFIX=/usr
 
 %:
-	dh $@
+	dh $@ --buildsystem=cmake --builddirectory=subsurface-build --parallel
 
 override_dh_auto_clean:
 	(cd libdivecomputer ; make clean || true)
@@ -32,7 +33,16 @@ override_dh_auto_configure:
 		ln -s src/lib/marble lib ; \
 		mkdir include ; cd include ; for i in `find ../../marble-source -name \*.h` ; do ln -s $$i . ; done ; \
 		ln -s . marble )
-	qmake LIBDCDEVEL=./libdivecomputer LIBGIT2DEVEL=./libgit2 LIBGIT2STATIC=1 LIBMARBLEDEVEL=./marble-build SPECIAL_MARBLE_PREFIX=1 subsurface.pro
+	(mkdir subsurface-build ; cd subsurface-build ; \
+		cmake -DCMAKE_BUILD_TYPE=Release \
+			-DPREFER_GIT_FROMSOURCE=1 \
+			-DLIBGIT2_INCLUDE_DIR=$$(pwd)/../libgit2/include \
+			-DLIBGIT2_LIBRARIES=$$(pwd)/../libgit2/build/libgit2.a \
+			-DLIBDIVECOMPUTER_INCLUDE_DIR=$$(pwd)/../libdivecomputer/include \
+			-DLIBDIVECOMPUTER_LIBRARIES=$$(pwd)/../libdivecomputer/src/.libs/libdivecomputer.a \
+			-DMARBLE_INCLUDE_DIR=$$(pwd)/../marble-build/include \
+			-DMARBLE_LIBRARIES=$$(pwd)/../marble-build/lib/libssrfmarblewidget.so \
+			$$(pwd)/.. ; )
 
 override_dh_installchangelogs:
 	dh_installchangelogs