-CFLAGS = -O2 -Wall -Wno-comment
-ifneq (,$(findstring debug,$(DEB_BUILD_OPTIONS)))
-CFLAGS += -g
+CFLAGS = `dpkg-buildflags --get CFLAGS`
+CFLAGS += -Wall -Wno-comment
+LDFLAGS = `dpkg-buildflags --get LDFLAGS`
+CPPFLAGS = `dpkg-buildflags --get CPPFLAGS`
+
+DEB_HOST_ARCH_OS ?= $(shell dpkg-architecture -qDEB_HOST_ARCH_OS)
+ifeq ($(DEB_HOST_ARCH_OS),linux)
+ configure_args += --with-selinux