+DEB_HOST_ARCH ?= $(shell dpkg-architecture -qDEB_HOST_ARCH)
+CFLAGS := $(shell dpkg-buildflags --get CFLAGS)
+CXXFLAGS := $(shell dpkg-buildflags --get CXXFLAGS)
+ifneq (,$(filter $(DEB_HOST_ARCH), i386 kfreebsd-i386))
+ config_opt = --disable-optimising
+ CFLAGS := $(filter-out -O%, $(CFLAGS))
+ CXXFLAGS := $(filter-out -O%, $(CXXFLAGS))
+else
+ config_opt = --enable-optimising
+endif
+
+