debian: use dpkg/default.mk to init popular make variables

Signed-off-by: Kefu Chai <tchaikov@gmail.com>

diff --git a/debian/rules b/debian/rules
index 796804fa9b706a0e4e7d77c518145a6f314a4d3e..6303fbb2e75dfde06ffe093488b6f91bed7b3a8f 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -3,7 +3,8 @@
 export DH_VERBOSE=1
 export DESTDIR=$(CURDIR)/debian/tmp
 
-export DEB_HOST_ARCH      ?= $(shell dpkg-architecture -qDEB_HOST_ARCH)
+include /usr/share/dpkg/default.mk
+
 extraopts += -DCMAKE_C_COMPILER=gcc-11 -DCMAKE_CXX_COMPILER=g++-11
 ifneq (,$(findstring WITH_STATIC_LIBSTDCXX,$(CEPH_EXTRA_CMAKE_ARGS)))
   # dh_auto_build sets LDFLAGS with `dpkg-buildflags --get LDFLAGS` on ubuntu,