#!/usr/bin/make -f
#
# Based on the work by Marcus Brinkmann <brinkmd@debian.org>
# Rewritten by Guillem Jover <guillem@debian.org>
# Rewritten to use `dh' by Pino Toscano <pino@debian.org>
#

export DEB_CFLAGS_MAINT_PREPEND := -Wall -pipe

include /usr/share/dpkg/architecture.mk

PKG_DEB_TARGET_GNU_CPU=$(subst _,-,$(DEB_TARGET_GNU_CPU))
PKG_DEB_HOST_GNU_CPU=$(subst _,-,$(DEB_HOST_GNU_CPU))

%:
	dh $@ -Bbuild

NATIVE_ARCHS=i386 amd64 arm64

export TARGET_CFLAGS = $(shell DEB_HOST_ARCH=$(DEB_TARGET_ARCH) dpkg-buildflags --get CFLAGS)
export TARGET_CPPFLAGS = $(shell DEB_HOST_ARCH=$(DEB_TARGET_ARCH) dpkg-buildflags --get CPPFLAGS)

ifeq ($(DEB_HOST_ARCH),$(DEB_TARGET_ARCH))
# CPU compatibility is enough to cross-build trivially
CONFIGURE_OPTIONS = \
	  --program-prefix=$(DEB_TARGET_GNU_CPU)-gnu-
ARCHS=$(NATIVE_ARCHS)
define d_a
$(shell dpkg-architecture -f -a$1 -A$1 -q$2 2> /dev/null)
endef
else
CONFIGURE_OPTIONS = \
	  --program-prefix=$(DEB_TARGET_GNU_CPU)-gnu- \
	  --build=$(DEB_BUILD_GNU_TYPE) \
	  --host=$(DEB_HOST_GNU_TYPE) \
	  --target=$(DEB_TARGET_GNU_TYPE)
CROSSDEP=:$(DEB_TARGET_ARCH)
ARCHS=$(DEB_TARGET_ARCH_CPU)
# The cross compiler at this stage does not have these in its standard include
export TARGET_CPPFLAGS += -I/usr/include -I/usr/include/$(DEB_TARGET_GNU_TYPE) -I/usr/include/$(DEB_TARGET_MULTIARCH)
define d_a
$($2)
endef
endif

debian/control: debian/control.stamp
debian/control.stamp: debian/control.in debian/control.native.in debian/control.target.in debian/rules
	sed -e 's/@crossdep@/$(CROSSDEP)/' < debian/control.in > debian/control
	echo "#Note: XXX this file is generated from .in files, see debian/rules" >> debian/control

ifeq ($(DEB_HOST_GNU_CPU),$(DEB_TARGET_GNU_CPU))
	cat debian/control.native.in >> debian/control
endif

	$(foreach a,$(ARCHS), \
	  sed -e 's/@target@/$(subst _,-,$(call d_a,$a,DEB_TARGET_GNU_CPU)-gnu)/' \
	      -e 's/@debtarget@/$(call d_a,$a,DEB_TARGET_ARCH_CPU) GNU\/Hurd/' \
	      -e 's/@debhost@/any-$(call d_a,$a,DEB_HOST_ARCH_CPU)/' \
	  < debian/control.target.in >> debian/control ; )

	touch $@

override_dh_auto_configure:
	dh_auto_configure -Bbuild -- \
	  --libexecdir=/usr/lib/mig/ \
	  $(CONFIGURE_OPTIONS)

ifneq ($(DEB_HOST_GNU_TYPE),$(DEB_TARGET_GNU_TYPE))
build-arch: debian/control.stamp
build-indep:
build: build-indep build-arch
endif

override_dh_auto_install:
	dh_auto_install --destdir=debian/tmp

override_dh_install:
	dh_install
	dh_install -pmig-$(PKG_DEB_TARGET_GNU_CPU)-gnu /usr/lib/mig/$(DEB_TARGET_GNU_CPU)-gnu-migcom
	dh_install -pmig-$(PKG_DEB_TARGET_GNU_CPU)-gnu /usr/bin/$(DEB_TARGET_GNU_CPU)-gnu-mig

override_dh_gencontrol:
	dh_gencontrol -- -V"mig:host=mig-$(PKG_DEB_HOST_GNU_CPU)-gnu (>= \$${source:Upstream-Version})"

override_dh_auto_clean:
	dh_auto_clean
	rm -rf debian/control.stamp