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 | #!/usr/bin/make -f
export DH_VERBOSE=1
d := debian/debian_defaults
# default in this architecture:
MPI=$(shell readlink /etc/alternatives/mpi | sed s%/usr/bin/%%g | sed s/mpicc\.//g )
# availability of MPI implementations:
OPENMPI_AVAILABLE_ARCHITECTURES := \
	alpha \
	amd64 \
	arm64 \
	armel \
	armhf \
	hppa \
	hurd-i386 \
	i386 \
	ia64 \
	kfreebsd-amd64 \
	kfreebsd-i386 \
	mips \
	mips64el \
	mipsel \
	m68k \
	powerpc \
	powerpcspe \
	ppc64 \
	ppc64el \
	riscv64 \
	s390x \
	sh4 \
	sparc64 \
	x32 \
MPICH_AVAILABLE_ARCHITECTURES := \
	alpha \
	amd64 \
	arm64 \
	armel \
	armhf \
	hppa \
	hurd-i386 \
	i386 \
	ia64 \
	kfreebsd-amd64 \
	kfreebsd-i386 \
	m68k \
	mips \
	mips64el \
	mipsel \
	powerpc \
	powerpcspe \
	ppc64 \
	ppc64el \
	riscv64 \
	s390x \
	sh4 \
	sparc64 \
	x32 \
# defaults
OPENMPI_ARCHITECTURES := \
	alpha \
	amd64 \
	arm64 \
	armel \
	armhf \
	hppa \
	hurd-i386 \
	i386 \
	ia64 \
	kfreebsd-amd64 \
	kfreebsd-i386 \
	mips \
	mips64el \
	mipsel \
	powerpc \
	powerpcspe \
	ppc64 \
	ppc64el \
	riscv64 \
	s390x \
	sparc64 \
	x32 \
MPICH_ARCHITECTURES := \
	m68k \
	sh4 \
%:
	dh $@
override_dh_auto_build:
	echo "# Default MPI implementation on this architecture:" > $d
	echo "ARCH_DEFAULT_MPI_IMPL=$(MPI)" >> $d
	echo "# Architectures where OpenMPI is available:" >> $d
	echo "OPENMPI_AVAILABLE_ARCHITECTURES=$(strip $(sort $(OPENMPI_AVAILABLE_ARCHITECTURES)))" >> $d
	echo "# Architectures where MPICH is available:" >> $d
	echo "MPICH_AVAILABLE_ARCHITECTURES=$(strip $(sort $(MPICH_AVAILABLE_ARCHITECTURES)))" >> $d
	echo "# Architectures defaulting to OpenMPI:" >> $d
	echo "OPENMPI_ARCHITECTURES=$(strip $(sort $(OPENMPI_ARCHITECTURES)))" >> $d
	echo "# Architectures defaulting to MPICH:" >> $d
	echo "MPICH_ARCHITECTURES=$(strip $(sort $(MPICH_ARCHITECTURES)))" >> $d
override_dh_gencontrol:
	rm -f debian/*.substvars
	if [ "$(MPI)" = "openmpi" ]; then \
	  echo "mpi=openmpi-bin" > debian/mpi-default-bin.substvars; \
	  echo "mpi-dev=libopenmpi-dev" > debian/mpi-default-dev.substvars; \
	elif [ "$(MPI)" = "mpich" ]; then \
	  echo "mpi=mpich" > debian/mpi-default-bin.substvars; \
	  echo "mpi-dev=libmpich-dev" > debian/mpi-default-dev.substvars; \
	else \
	  echo "Unknown MPI implementation, stopping"; \
	  exit 1; \
	fi
	dh_gencontrol
override_dh_install:
	dh_install -pmpi-default-dev $d usr/share/mpi-default-dev/
override_dh_clean:
	dh_clean
	@echo "Generating the control file..."
	echo "# DON'T MANUALLY MODIFY!" > debian/control.tmp
	echo "# EDIT debian/control.in INSTEAD!" >> debian/control.tmp
	echo "#" >> debian/control.tmp
	cat debian/control.in >> debian/control.tmp
	sed -i "s,%SUPPORTED_ARCHITECTURES%,$(strip $(sort $(OPENMPI_ARCHITECTURES) $(MPICH_ARCHITECTURES))),g" debian/control.tmp
	sed -i "s,%OPENMPI_ARCHITECTURES%,$(strip $(sort $(OPENMPI_ARCHITECTURES))),g" debian/control.tmp
	sed -i "s,%MPICH_ARCHITECTURES%,$(strip $(sort $(MPICH_ARCHITECTURES))),g" debian/control.tmp
	set -e ; if ! diff -q debian/control debian/control.tmp > /dev/null; then \
		echo ;\
		echo "The generated control file differs from the actual one." ;\
		echo "A sourceful upload of this package is needed." ;\
		echo ;\
		echo "Differences:" ;\
		diff -u debian/control debian/control.tmp ;\
	else \
		rm debian/control.tmp ;\
	fi
 |