core: sync debian files with debian git repository (use build flags from dpkg-buildflags if possible)

debian/changelog

@@ -1,3 +1,10 @@
+weechat (0.3.6-2) unstable; urgency=low
+
+  * Update debian/rules to use build flags from dpkg-buildflags when it's
+  possible (ie: with dpkg >= 1.16.1).
+
+ -- Emmanuel Bouthenot <kolter@debian.org>  Sat, 29 Oct 2011 07:31:14 +0000
+
 weechat (0.3.6-1) unstable; urgency=low
 
   * New upstream release

debian/rules

@@ -1,21 +1,33 @@
 #!/usr/bin/make -f
 
+# Default build flags
+CFLAGS = -g -O2
+LDFLAGS = -Wl,-Bsymbolic-functions
+
+# dpkg >= 1.16.1 provides enhanced build flags (hardening features, etc.)
+DPKG_EXPORT_BUILDFLAGS = 1
+-include /usr/share/dpkg/buildflags.mk
+
 builddir/Makefile:
 	mkdir -p builddir
 	cd builddir && \
 	cmake .. \
 		-DCMAKE_INSTALL_PREFIX:FILEPATH=/usr \
 		-DCMAKE_BUILD_TYPE:STRING=RelWithDebInfo \
-		-DCMAKE_C_FLAGS_RELWITHDEBINFO:STRING="-O2 -g $(CFLAGS)" \
-		-DCMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO:STRING="-Wl,-z,defs" \
+		-DCMAKE_C_FLAGS_RELWITHDEBINFO:STRING="$(CFLAGS)" \
+		-DCMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO:STRING="$(LDFLAGS)" \
 		-DCMAKE_SKIP_RPATH:BOOL=ON \
 		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON
 
-build: build-stamp
-build-stamp: builddir/Makefile
-	dh_testdir
+#build: build-stamp
+#build-stamp: builddir/Makefile
+#	dh_testdir
+#	$(MAKE) -C builddir VERBOSE=1
+#	touch $@
+
+override_dh_auto_build: builddir/Makefile
 	$(MAKE) -C builddir
-	touch $@
+	dh_auto_build
 
 override_dh_auto_configure:
 	# the package also has autotools buildsys and