export DEB_BUILD_MAINT_OPTIONS=hardening=+all
debian_cflags:=$(shell dpkg-buildflags --get CFLAGS) -fPIC $(shell dpkg-buildflags --get CPPFLAGS)
debian_ldflags:=$(shell dpkg-buildflags --get LDFLAGS) -fPIC

# export necessary perl hardenging flags
# see: src/http/modules/perl/Makefile.PL
DEBIAN_NGINX_PERL_LDFLAGS:= $(shell DEB_BUILD_MAINT_OPTIONS=hardening=+all,-pie dpkg-buildflags --get LDFLAGS)
export DEBIAN_NGINX_PERL_LDFLAGS