#!/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

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

DPDK_ABI := $(shell echo $(DEB_VERSION_UPSTREAM) | cut -d '-' -f1 | cut -d '.'  -f1-2 | cut -d '~' -f1)
DPDK_DRIVER_DIR ?= dpdk-$(DPDK_ABI)-drivers

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

# see ENVIRONMENT in dpkg-buildflags(1)
DPKG_EXPORT_BUILDFLAGS = 1
include /usr/share/dpkg/buildflags.mk

# Support backporting to jessie
dpkg_version_lt = $(shell dpkg --compare-versions $$(dpkg --status dpkg-dev | grep Version | cut -d' ' -f2) lt-nl "1.18.11" && echo yes)
ifeq (yes, $(dpkg_version_lt))
	# package maintainers to append CFLAGS
	# For Debian, dpkg-dev >= 1.18.11 and gcc 6.x, dpkg-buildflags and gcc
	# handle -fPIC and related flags relying on specs files
	# (/usr/share/dpkg/*specs)
	export DEB_CFLAGS_MAINT_APPEND  = -fPIC
	export EXTRA_CFLAGS=$(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)
endif

export RTE_DEVEL_BUILD=n
export EXTRA_CFLAGS+=-g

# People rebuilding this package can overwrite DPDK_CONFIG, RTE_MACHINE and
# RTE_TARGET via DEB_BUILD_OPTIONS if they like
ifneq (,$(filter dpdk_config=%,$(DEB_BUILD_OPTIONS)))
    DPDK_CONFIG ?= $(patsubst dpdk_config=%,%,$(filter dpdk_config=%,$(DEB_BUILD_OPTIONS)))
endif
ifneq (,$(filter rte_machine=%,$(DEB_BUILD_OPTIONS)))
    RTE_MACHINE ?= $(patsubst rte_machine=%,%,$(filter rte_machine=%,$(DEB_BUILD_OPTIONS)))
endif
ifneq (,$(filter rte_target=%,$(DEB_BUILD_OPTIONS)))
    RTE_TARGET ?= $(patsubst rte_target=%,%,$(filter rte_target=%,$(DEB_BUILD_OPTIONS)))
endif

ifneq (,$(filter $(DEB_HOST_ARCH), arm64))
DPDK_CONFIG ?= "arm64-armv8a-linuxapp-gcc"
RTE_MACHINE ?= "armv8a"
RTE_TARGET ?= "arm64-armv8a-linuxapp-gcc"
INCLUDE_ARCH := arm
else
ifneq (,$(filter $(DEB_HOST_ARCH), ppc64el))
DPDK_CONFIG ?= "ppc_64-power8-linuxapp-gcc"
RTE_MACHINE ?= "power8"
RTE_TARGET ?= "ppc_64-power8-linuxapp-gcc"
INCLUDE_ARCH := ppc_64
else
DPDK_CONFIG ?= "$(DEB_HOST_GNU_CPU)-native-linuxapp-gcc"
RTE_MACHINE ?= "default"
RTE_TARGET ?= "$(DEB_HOST_GNU_CPU)-default-linuxapp-gcc"
INCLUDE_ARCH := x86
endif
endif
DPDK_STATIC_DIR = "debian/build/static-root"
DPDK_SHARED_DIR = "debian/build/shared-root"

# now stable with parallel comilation, so support -j
ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
    PAR := $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
    MAKEFLAGS += -j$(PAR)
endif

ifneq (,$(findstring nodoc,$(DEB_BUILD_OPTIONS)))
BUILD_DOCS=n
else
BUILD_DOCS=y
endif

ifneq (,$(findstring nostatic,$(DEB_BUILD_OPTIONS)))
BUILD_STATIC_LIB=n
else
BUILD_STATIC_LIB=y
endif

# 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
export MODULE_CFLAGS=-fno-PIE

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))

build:
	@if [ x"$(KVERS)" = x ] ; then \
	    echo 'No version in $(KSRC)/include/linux/version.h' >&2; \
	    exit 1; \
	fi
	sh debian/prep-modules $(KSRC)
	cat debian/control.modules >> debian/control
	dh $@ --with python3,dkms,systemd
endif

%:
	dh $@ --with python3,dkms,systemd

override_dh_gencontrol:
	dh_gencontrol
	# debian/files will not exist until dh_gencontrol has ran at least once,
	# so we need to run gencontrol for libdpdk-dev and libdpdk-dbgsym after.
	# The list of libraries and PMDs is everchanging, so generate the dependency
	# list for libdpdk-dev to avoid having to maintain it manually.
	# Same for the recommends list for dpdk, were we want the PMDs and the mempools.
	dh_gencontrol -p libdpdk-dev -- -V"librte:Depends=`grep -E 'librte-*' ./debian/files | grep -v dbgsym | tr '_' ' ' | awk '{ print $$1,"(=",$$2 ")" }' | paste -sd ',' - | sed -e 's/,/, /g'`"
	dh_gencontrol -p dpdk -- -V"librte:Recommends=`grep -E 'librte-(pmd|mempool).*' ./debian/files | grep -v dbgsym | tr '_' ' ' | awk '{ print $$1,"(=",$$2 ")" }' | paste -sd ',' - | sed -e 's/,/, /g'`"
ifneq (,$(findstring kernel_modules,$(DEB_BUILD_OPTIONS)))
	dh_gencontrol -p dpdk-modules-$(KVERS) -- \
		-v`cat debian/VERSION` \
		-V'built:using:kernel=$(call get_built_using,linux-headers-$(KVERS))'
endif
ifneq (,$(findstring dbgsym_meta,$(DEB_BUILD_OPTIONS)))
	./debian/dh-dbgsym-metapkg libdpdk$(DPDK_ABI)-dbgsym
endif

# dbgsym_meta can be passed via DEB_BUILD_OPTIONS to enable building the
# optional dbgsym meta package libdpdk<ABI>-dbgsym.
# This is not built by default as it would go in main but depend on
# packages in the debian-debug archive.
# Debian Developers and FTP masters strongly discourage this.
# We provide this optional flag as a convenience for rebuilders.
ifneq (,$(findstring dbgsym_meta,$(DEB_BUILD_OPTIONS)))
override_dh_builddeb:
	dh_builddeb
	dh_builddeb -plibdpdk$(DPDK_ABI)-dbgsym
endif

override_dh_auto_clean:
	rm -rf debian/build debian/tmp debian/dpdk-modules-* \
		debian/control.modules debian/VERSION
	sed -i '/Package: dpdk-modules-/,/`tail -n1 debian/control.modules.in`/d' debian/control
	test -L config/defconfig_$(DPDK_CONFIG) && rm -f config/defconfig_$(DPDK_CONFIG) || true
	rm -f debian/dpdk-igb-uio-dkms.dkms debian/dpdk-rte-kni-dkms.dkms
	rm -f debian/dpdk-dev.preinst

override_dh_auto_configure:
	# Add support for a custom defconfig file in the debian directory.
ifneq (,$(filter dpdk_config=%,$(DEB_BUILD_OPTIONS)))
	test -e config/defconfig_$(DPDK_CONFIG) || ln -fs ../debian/defconfig_$(DPDK_CONFIG) config/defconfig_$(DPDK_CONFIG)
endif
	# 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
ifeq (,$(filter dpdk_config=%,$(DEB_BUILD_OPTIONS)))
	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$(DPDK_CONFIG_BUILD_KMOD),' \
		-e 's,(LIBRTE_PMD_PCAP=).*,\1y,' \
		-e 's,(CONFIG_RTE_LIBRTE_MLX4_PMD=).*,\1y,' \
		-e 's,(CONFIG_RTE_LIBRTE_MLX5_PMD=).*,\1y,' \
		-e 's,(CONFIG_RTE_EAL_PMD_PATH=).*,\1"/usr/lib/$(DEB_HOST_MULTIARCH)/$(DPDK_DRIVER_DIR)/",' \
		-e 's,(LIBRTE_PMD_OPENSSL=).*,\1y,' \
		$(DPDK_STATIC_DIR)/.config
endif
	echo "CONFIG_RTE_MAJOR_ABI=\"$(DPDK_ABI)\"" >> \
		$(DPDK_STATIC_DIR)/.config
	dh_auto_configure

override_dh_auto_build-indep:
ifeq (y,$(BUILD_DOCS))
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) doc-api-html doc-guides-html
endif

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

override_dh_auto_build-arch:
ifeq (y,$(BUILD_STATIC_LIB))
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) RTE_KERNELDIR=$(KSRC) build
endif
	# 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
ifeq (y,$(BUILD_DOCS))
	# need to be around for dh_installman to be picked up
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) RTE_KERNELDIR=$(KSRC) doc-guides-man
endif
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) RTE_KERNELDIR=$(KSRC) test-build

override_dh_auto_install-arch: LIBDIR=/usr/lib/$(DEB_HOST_MULTIARCH)
override_dh_auto_install-arch:
	# Package: dpdk (runtime)
ifeq (y,$(BUILD_STATIC_LIB))
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_STATIC_DIR) prefix=/usr libdir=$(LIBDIR) \
		DESTDIR=debian/dpdk install-runtime
endif
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) prefix=/usr libdir=$(LIBDIR) \
		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/usertools/dpdk-devbind.py \
		debian/dpdk/sbin/dpdk-devbind
	# Package: dpdk-dev (build environment)
	# workaround to fix symbolic link creation
	mkdir -p debian/dpdk-dev/$(LIBDIR)
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) prefix=/usr libdir=$(LIBDIR) \
		DESTDIR=debian/dpdk-dev install-sdk
	# remove workaround
	rm -fr debian/dpdk-dev/usr/lib
	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
	# include the bundled autotest suite to be usable from the dpdk-dev package
	if grep -qs 'CONFIG_RTE_APP_TEST=y' $(DPDK_SHARED_DIR)/.config; then \
		mkdir -p debian/dpdk-dev/usr/share/dpdk/test; \
		cp -a test/test/autotest* debian/dpdk-dev/usr/share/dpdk/test; \
		cp $(DPDK_SHARED_DIR)/app/test debian/dpdk-dev/usr/share/dpdk/test/; \
		cp $(DPDK_SHARED_DIR)/app/testacl debian/dpdk-dev/usr/share/dpdk/test/; \
		cp $(DPDK_SHARED_DIR)/app/testpipeline debian/dpdk-dev/usr/share/dpdk/test/; \
	fi
	# since we move libs to multiarch dirs update the non aware symlink
	rm debian/dpdk-dev/usr/share/dpdk/$(RTE_TARGET)/lib
	ln -rs debian/dpdk-dev/$(LIBDIR)/ \
		debian/dpdk-dev/usr/share/dpdk/$(RTE_TARGET)/lib
	# Package: libdpdk-dev (bare headers, static devel libs and linker
	# script)
	mkdir -p debian/libdpdk-dev/$(LIBDIR)
	# linker script
	mv debian/dpdk/$(LIBDIR)/libdpdk.so debian/libdpdk-dev/$(LIBDIR)/
	# includes
	# Some headers have architecture-specific content, but the upstream build
	# system installs them in the same directory, breaking multiarch.
	# Move them in /usr/include/<arch>/dpdk instead.
	mkdir -p debian/libdpdk-dev/usr/include/$(DEB_HOST_MULTIARCH)/dpdk
	# Before moving the files, remove the symlink in usr/share/dpdk and copy them over,
	# as the SDK subdir is architecture specific and requires the arch-specific headers
	# in the top level
	rm -f debian/dpdk-dev/usr/share/dpdk/$(RTE_TARGET)/include
	mkdir -p debian/dpdk-dev/usr/share/dpdk/$(RTE_TARGET)/include
	cp -r debian/dpdk-dev/usr/include/dpdk/* debian/dpdk-dev/usr/share/dpdk/$(RTE_TARGET)/include
	# genereate the preinst to deal with the symlink -> directory transition smoothly
	sed "s/@@RTE_TARGET@@/$(RTE_TARGET)/g" debian/dpdk-dev.preinst.in > debian/dpdk-dev.preinst
	mv $(addprefix debian/dpdk-dev/usr/include/dpdk/,$(notdir $(wildcard lib/librte_eal/common/include/arch/$(INCLUDE_ARCH)/*.h))) \
		debian/libdpdk-dev/usr/include/$(DEB_HOST_MULTIARCH)/dpdk/
	mv debian/dpdk-dev/usr/include/dpdk/rte_config.h \
		debian/libdpdk-dev/usr/include/$(DEB_HOST_MULTIARCH)/dpdk/
	mv debian/dpdk-dev/usr/include/dpdk debian/libdpdk-dev/usr/include/
	rmdir debian/dpdk-dev/usr/include
	# backward compatibility: to ease things for the majority of users,
	# which are on x86_64, symlink the x86 headers into the global
	# directory.
ifeq (x86_64-linux-gnu,$(DEB_HOST_MULTIARCH))
	ln -rs debian/libdpdk-dev/usr/include/$(DEB_HOST_MULTIARCH)/dpdk/*.h \
		debian/libdpdk-dev/usr/include/dpdk
endif
	# have the DKMS build include the correct per-arch directory
	sed "s/@@DEB_HOST_MULTIARCH@@/$(DEB_HOST_MULTIARCH)/g" debian/dpdk-igb-uio-dkms.dkms.in > debian/dpdk-igb-uio-dkms.dkms
	sed "s/@@DEB_HOST_MULTIARCH@@/$(DEB_HOST_MULTIARCH)/g" debian/dpdk-rte-kni-dkms.dkms.in > debian/dpdk-rte-kni-dkms.dkms
	# all static libs are in the dev package
ifeq (y,$(BUILD_STATIC_LIB))
	mv debian/dpdk/$(LIBDIR)/lib*.a debian/libdpdk-dev/$(LIBDIR)/
endif
	# symlinks to last .so's are in the non versioned libdpdk-dev as well
	# this allows multiple libdpdk-<NAME><VER> at different VER concurrently
	# libdpdk-dev depends on all sublibs so symlinks are never broken
	mv debian/dpdk/$(LIBDIR)/*.so debian/libdpdk-dev/$(LIBDIR)/
	# Package(s): libdpdk-<NAME><VER> (bare runtime libs)
	for lib in $$(ls -1 debian/dpdk/$(LIBDIR)/*.so.*); do \
	  BN=$$(basename $${lib}); \
	  LN=$$(echo $${BN} | sed -e 's/\.so\.[0-9\.]*$$//' | tr '_' '-'); \
	  if echo $${LN} | grep -q ".*[0-9]$$"; then \
	    PKG=$${LN}-$(DPDK_ABI); \
	  else \
	    PKG=$${LN}$(DPDK_ABI); \
	  fi; \
	  LIBF="$$(basename $${lib})"; \
	  LIBD="debian/$${PKG}/$(LIBDIR)"; \
	  echo "moving $${lib} to dir $${LIBD} (PKG=$${PKG} BN=$${BN} LN={$${LN} LIBF=$${LIBF} LIBD=$${LIBD})"; \
	  mkdir -p $${LIBD}; \
	  mv $${lib} $${LIBD}; \
	  if [ "$${LIBF#librte_pmd_}x" != "$${LIBF}x" ]; then \
	    mkdir -p $${LIBD}/$(DPDK_DRIVER_DIR); \
	    echo "PMD: linking $${LIBF} into RTE_EAL_PMD_PATH at $${LIBD}/$(DPDK_DRIVER_DIR)/"; \
	    ln -s --relative --target-directory=$${LIBD}/$(DPDK_DRIVER_DIR)/ $${LIBD}/$${LIBF}; \
	  fi; \
	  if [ "$${LIBF#librte_mempool_}x" != "$${LIBF}x" ]; then \
	    mkdir -p $${LIBD}/$(DPDK_DRIVER_DIR); \
	    echo "MEMPOOL: linking $${LIBF} into RTE_EAL_PMD_PATH at $${LIBD}/$(DPDK_DRIVER_DIR)/"; \
	    ln -s --relative --target-directory=$${LIBD}/$(DPDK_DRIVER_DIR)/ $${LIBD}/$${LIBF}; \
	  fi; \
	  if [ "$${LIBF#librte_eal}x" != "$${LIBF}x" ]; then \
	    mkdir -p $${LIBD}/$(DPDK_DRIVER_DIR); \
	  fi; \
	done
	# pkg-config
	mkdir -p debian/libdpdk-dev/$(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@/$(DEB_VERSION_UPSTREAM)/" \
		-e "s|@DEB_HOST_MULTIARCH@|$(DEB_HOST_MULTIARCH)|g" \
		debian/libdpdk.pc.in > debian/libdpdk-dev/$(LIBDIR)/pkgconfig/libdpdk.pc
	# Package: dpdk-igb-uio-dkms
	mkdir -p debian/dpdk-igb-uio-dkms/usr/src/dpdk-igb-uio-$(DEB_VERSION_UPSTREAM)
	cp kernel/linux/igb_uio/* \
		debian/dpdk-igb-uio-dkms/usr/src/dpdk-igb-uio-$(DEB_VERSION_UPSTREAM)
	# Package: dpdk-rte-kni-dkms
	mkdir -p debian/dpdk-rte-kni-dkms/usr/src/dpdk-rte-kni-$(DEB_VERSION_UPSTREAM)
	cp -a kernel/linux/kni/* \
		debian/dpdk-rte-kni-dkms/usr/src/dpdk-rte-kni-$(DEB_VERSION_UPSTREAM)
ifneq (,$(KVERS))
	# Package: dpdk-modules-<kernel version>
	$(MAKE) V=$(DH_VERBOSE) O=$(DPDK_SHARED_DIR) \
		kerneldir=/lib/modules/$(KVERS)/extra/dpdk \
		DESTDIR=debian/dpdk-modules-$(KVERS) install-kmod
endif

override_dh_dkms:
	dh_dkms -V $(DEB_VERSION_UPSTREAM)

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:

override_dh_python3:
	# dh_python only looks in /usr/share/package_name but dpdk-doc installs in
	# /usr/share/dpdk, so pass /usr to catch all
	dh_python3 --shebang=/usr/bin/python3 /usr