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#!/usr/bin/make -f
# See debhelper(7) (uncomment to enable)
# output every command that modifies files on the build system.
export DH_VERBOSE=1
export DH_OPTIONS=-v

VERSION := $(shell dpkg-parsechangelog | sed -nr '/^Version:/s/Version: (.*:)?(.*)-(.*)/\2/p')

# see EXAMPLES in dpkg-buildflags(1) and read /usr/share/dpkg/*
include /usr/share/dpkg/default.mk

DEB_HOST_GNU_CPU := $(shell dpkg-architecture -qDEB_HOST_GNU_CPU)

# see FEATURE AREAS in dpkg-buildflags(1)
export DEB_BUILD_MAINT_OPTIONS = hardening=+all,-pie

# see ENVIRONMENT in dpkg-buildflags(1)
# package maintainers to append CFLAGS
export DEB_CFLAGS_MAINT_APPEND  = -fPIC
# package maintainers to append LDFLAGS
#export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed

include /usr/share/dpkg/buildflags.mk
export EXTRA_CFLAGS=$(CFLAGS)
export EXTRA_CPPFLAGS=$(CPPFLAGS)
export HOST_EXTRA_CFLAGS=$(CFLAGS)
export HOST_EXTRA_CPPFLAGS=$(CPPFLAGS)
# need to be stripped as DPDK build system adds them and it would be -Wl,-Wl,opt
export EXTRA_LDFLAGS=$(shell echo $(LDFLAGS) | sed 's/-Wl,//g')
# HOST_CC build system does not add -Wl ...
export EXTRA_HOST_LDFLAGS=$(LDFLAGS)

# People rebuilding this package can overwrite DPDK_CONFIG, RTE_MACHINE and
# RTE_TARGET via environment variables if they like
ifneq (,$(filter $(DEB_HOST_ARCH), arm64))
DPDK_CONFIG := "arm64-armv8a-linuxapp-gcc"
RTE_MACHINE := "armv8a"
RTE_TARGET := "arm64-armv8a-linuxapp-gcc"
else
DPDK_CONFIG := "$(DEB_HOST_GNU_CPU)-native-linuxapp-gcc"
RTE_MACHINE := "default"
RTE_TARGET := "$(DEB_HOST_GNU_CPU)-default-linuxapp-gcc"
endif
DPDK_STATIC_DIR = "debian/build/static-root"
DPDK_SHARED_DIR = "debian/build/shared-root"

# kernel_modules can be passed via DEB_BUILD_OPTIONS to enable building the
# optional binary kernel modules package. By default it will be built against
# the current kernel, or ksrc can be passed with a path to the target kernel
# sources instead.
ifeq (,$(findstring kernel_modules,$(DEB_BUILD_OPTIONS)))
DPDK_CONFIG_BUILD_KMOD=n
KSRC=""
else
ifneq (,$(filter ksrc=%,$(DEB_BUILD_OPTIONS)))
    KSRC := $(patsubst ksrc=%,%,$(filter ksrc=%,$(DEB_BUILD_OPTIONS)))
else
    KSRC := /lib/modules/$(shell uname -r)/build
endif

KVERS := $(shell perl debian/kernel-version $(KSRC))
export KVERS

DPDK_CONFIG_BUILD_KMOD=y

# Since the binary module package is generated at build time depending on the
# local kernel version, we have to append the new package in d/control.
# We cannot use a separate control file since that wouldn't work with
# dpkg-genchanges, and also would require a lot of overrides for debhelpers.
get_built_using	?= $(filter-out (=),$(shell dpkg-query -f='$${source:Package} (=$${source:Version})' -W $1))

override_dh_gencontrol:
	dh_gencontrol
	dh_gencontrol -p dpdk-modules-$(KVERS) -- \
		-v`cat debian/VERSION` \
		-V'built:using:kernel=$(call get_built_using,linux-headers-$(KVERS))'

build:
	@if [ x"$(KVERS)" = x ] ; then \
	    echo 'No version in $(KSRC)/include/linux/version.h' >&2; \
	    exit 1; \
	fi
	sh debian/prep-modules $(KSRC)
	test -f debian/control.orig || cp -v debian/control debian/control.orig
	cat debian/control.orig debian/control.modules > debian/control
	dh $@ --with python2,dkms
endif

%:
	dh $@ --with python2,dkms

override_dh_auto_clean:
	rm -rf debian/build debian/tmp debian/dpdk-modules-* \
		debian/control.modules debian/VERSION
	mv debian/control.orig debian/control || true

override_dh_auto_configure:
	# report dpkg-buildflags status to build log
	dpkg-buildflags --status
	echo EXTRA_CFLAGS $$EXTRA_CFLAGS
	echo EXTRA_LDFLAGS: $$EXTRA_LDFLAGS
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) T=$(DPDK_CONFIG) config
	sed -ri -e 's,(RTE_MACHINE=).*,\1$(RTE_MACHINE),' \
		-e 's,(RTE_NEXT_ABI=).*,\1n,' \
		-e 's,(CONFIG_RTE_EAL_IGB_UIO=).*,\1$(DPDK_CONFIG_BUILD_KMOD),' \
		-e 's,(CONFIG_RTE_KNI_KMOD=).*,\1$(DPDK_CONFIG_BUILD_KMOD),' \
		-e 's,(LIBRTE_PMD_PCAP=).*,\1y,' \
		-e 's,(LIBRTE_PMD_XENVIRT=).*,\1y,' \
		$(DPDK_STATIC_DIR)/.config
	dh_auto_configure

override_dh_auto_build-indep:
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) doc-api-html doc-guides-html

override_dh_auto_install-indep:
	# Package: dpdk-doc
	# All files based on the install-doc rule (includes examples)
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) prefix=/usr \
		DESTDIR=debian/dpdk-doc install-doc

override_dh_auto_build-arch:
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) build
	# Unfortunately the decision about having static or shared libraries is
	# made for the whole build, which then produces only .a or .so files
	# (but not both).
	# And the target layout for target selection has no field for the
	# type of library.
	# Right now I hack this by doing a second build which only differs in
	# the selection of shared libs.
	# Shared libs should be default, so the previous static build is only
	# used to get static libraries.
	cp -a $(DPDK_STATIC_DIR) $(DPDK_SHARED_DIR)
	sed -ri 's,(RTE_BUILD_SHARED_LIB=).*,\1y,' \
		$(DPDK_SHARED_DIR)/.config
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) RTE_KERNELDIR=$(KSRC) build

override_dh_auto_install-arch: LIBDIR=usr/lib/$(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
override_dh_auto_install-arch:
	# Package: dpdk (runtime)
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) prefix=/usr \
		DESTDIR=debian/dpdk install-runtime
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) prefix=/usr \
		DESTDIR=debian/dpdk install-runtime
	mkdir -p debian/dpdk/etc/dpdk
	cp debian/dpdk.interfaces debian/dpdk/etc/dpdk/interfaces
	rm debian/dpdk/usr/sbin/dpdk-devbind
	mkdir -p debian/dpdk/sbin
	ln -s /usr/share/dpdk/tools/dpdk-devbind.py \
		debian/dpdk/sbin/dpdk-devbind
	# Package: dpdk-dev (build environment)
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) prefix=/usr \
		DESTDIR=debian/dpdk-dev install-sdk
	cp $(DPDK_SHARED_DIR)/.config debian/dpdk-dev/usr/share/dpdk/config
	sed -e 's/SDK_TARGET/$(RTE_TARGET)/' debian/dpdk-sdk-env.sh.in > \
		debian/dpdk-dev/usr/share/dpdk/dpdk-sdk-env.sh
	# Package: libdpdk-dev (bare headers, static devel libs and linker
	# script)
	mkdir -p debian/libdpdk-dev/$(LIBDIR)
	# linker script
	mv debian/dpdk/usr/lib/libdpdk.so debian/libdpdk-dev/$(LIBDIR)/
	# includes
	mkdir -p debian/libdpdk-dev/usr/include
	mv debian/dpdk-dev/usr/include/dpdk debian/libdpdk-dev/usr/include/
	# all static libs are in the dev package
	mv debian/dpdk/usr/lib/lib*.a debian/libdpdk-dev/$(LIBDIR)/
	# symlinks to last .so's are in the non versioned libdpdk-dev as well
	# this allows multiple libdpdk-<NAME><VER> at different VER concurrently
	# libdpdk-dev depends on all sublibs so symlinks are never broken
	mv debian/dpdk/usr/lib/*.so debian/libdpdk-dev/$(LIBDIR)/
	# Package(s): libdpdk-<NAME><VER> (bare runtime libs)
	for lib in $$(ls -1 debian/dpdk/usr/lib/*.so.*); do \
	  BN=$$(basename $${lib}); \
	  VER=$$(echo $${BN} | sed -e 's/^.*\.so\.//'); \
	  LN=$$(echo $${BN} | sed -e 's/\.so\.[0-9]*$$//' | tr '_' '-'); \
	  if echo $${LN} | grep -q ".*[0-9]$$"; then \
	    PKG=$${LN}-$${VER}; \
	  else \
	    PKG=$${LN}$${VER}; \
	  fi; \
	  echo "moving $${lib} for library $${PKG}"; \
	  mkdir -p debian/$${PKG}/$(LIBDIR); \
	  mv $${lib} debian/$${PKG}/$(LIBDIR); \
	done
	# pkg-config
	mkdir -p debian/libdpdk-dev/$(LIBDIR)/pkgconfig
	LIBS=$$(sed -e 's/GROUP ( \(.*\) )/\1/' -e 's/lib/-l/g' -e 's/\.so//g' \
		$(CURDIR)/debian/libdpdk-dev/$(LIBDIR)/libdpdk.so); \
	sed -e "s/@DPDK_LIBS@/$${LIBS}/" -e "s/@VERSION@/$(VERSION)/" \
		debian/libdpdk.pc.in > debian/libdpdk-dev/$(LIBDIR)/pkgconfig/libdpdk.pc
	# Package: dpdk-igb-uio-dkms
	mkdir -p debian/dpdk-igb-uio-dkms/usr/src/dpdk-igb-uio-$(VERSION)
	cp lib/librte_eal/linuxapp/igb_uio/* \
		debian/dpdk-igb-uio-dkms/usr/src/dpdk-igb-uio-$(VERSION)
	# Package: dpdk-rte-kni-dkms
	mkdir -p debian/dpdk-rte-kni-dkms/usr/src/dpdk-rte-kni-$(VERSION)
	cp -a lib/librte_eal/linuxapp/kni/* \
		debian/dpdk-rte-kni-dkms/usr/src/dpdk-rte-kni-$(VERSION)
ifneq (,$(KVERS))
	# Package: dpdk-modules-<kernel version>
	mkdir -p debian/dpdk-modules-$(KVERS)/lib/modules/$(KVERS)/kernel/drivers/net
	cp -a debian/build/shared-root/kmod/* \
		debian/dpdk-modules-$(KVERS)/lib/modules/$(KVERS)/kernel/drivers/net
endif

override_dh_dkms:
	dh_dkms -V $(VERSION)

override_dh_installinit:
	dh_installinit --no-start --no-restart-on-upgrade

override_dh_systemd_start:
	dh_systemd_start --no-start --no-restart-on-upgrade

override_dh_auto_test: