#!/usr/bin/make -f

# export DH_VERBOSE=1

# The magic debhelper  rule
%:
	dh $@ --buildsystem=ecbuild

export DEB_LDFLAGS_MAINT_PREPEND := -Wl,-z,defs -Wl,--as-needed

export ECCODES_DEFINITION_PATH=/usr/share/eccodes/definitions/
export GRIB_DEFINITION_PATH=/usr/share/eccodes/definitions/
export ECCODESX_SAMPLES_PATH=/usr/share/eccodes/samples
export GRIB_SAMPLES_PATH=/usr/share/eccodes/samples

# gfortran warns of type mismatch on Fortran/C code. Not worth fixing this by redesign
# (porting to F90) when its being replaced by mir. Just disable the warning
GF10_FLAGS:=$(if $(filter $(shell readlink /usr/bin/gfortran), gfortran-10), \
		 -fallow-argument-mismatch, )

DESTDIR:=$(shell pwd)/debian/tmp
DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
ARCH:=$(shell dpkg --print-architecture)
LIBDIR:=/usr/lib/${DEB_HOST_MULTIARCH}
CMAKE_DIR:=debian/tmp/share/libemos/cmake
DO_TEST:=true

# FC set to f77 by default in make
# Read default compiler name unless FC is actually set
ifeq ($(FC),f77)
  FC:=$(shell basename $(shell readlink /etc/alternatives/f95))
endif


ifneq ($(filter flang,$(FC)),)
FFLAGS:=$(shell dpkg-buildflags --get FCFLAGS |  sed -e 's/-g //')
else
FFLAGS:=$(shell dpkg-buildflags --get FCFLAGS ) $(GF10_FLAGS) 
endif

export FCFLAGS=$(FFLAGS)
export FFLAGS FCFLAGS

# Do tests on little-endian only for the moment;
ENDIAN:=$(shell dpkg-architecture -qDEB_BUILD_ARCH_ENDIAN)

FPIC_LIST:= "s390x amd64 ppc64el m68k sparc64"
ifneq (,$(findstring $(ARCH),$(FPIC_LIST)))
  FPIC:= -fPIC
else
  FPIC:= -fpic
endif

MCMODEL_FLAGS:=''
BUILD_FLAGS:=''

ifeq ($(ARCH), amd64)
  MCMODEL_FLAGS:= -mcmodel=medium
endif
ifeq ($(ARCH), sparc64)
  MCMODEL_FLAGS:= -mcmodel=medany
endif
ifeq ($(ARCH), ppc64el)
  MCMODEL_FLAGS:= -mcmodel=large
endif
ifeq ($(ARCH), hurd-i386)
  BUILD_FLAGS:= ' -D__GNU__'
endif

override_dh_auto_test:
	# Need to be installed into debian/tmp before tests
	cd obj-* && $(MAKE) install
	# Need links for tests.
	(cd bufrtables && sh ./links.sh)
	 $(ENDIAN)==little && dh_auto_test || echo "Tests disabled on bigendian systems for the moment"

override_dh_auto_clean:
	find bufrtables -type l -delete
	dh_auto_clean

override_dh_auto_configure:
	dh_auto_configure -- \
		-DECBUILD_MACROS_DIR=$(CURDIR)/cmake \
		-DENABLE_ECCODES=On \
		-Deccodes_DIR=/usr \
		-DENABLE_FFTW=ON \
		-DENABLE_LITTLE_ENDIAN=On \
		-DCMAKE_INSTALL_PREFIX=$(DESTDIR) \
		-DBUILD_SHARED_LIBS=ON \
		-DENABLE_LIBEMOS_BUILD_SHARED_LIBS=On \
		-DMCMODEL_FLAGS=${MCMODEL_FLAGS} \
		-DBUILD_FLAGS=${BUILD_FLAGS} \
		-DFPIC=${FPIC} \
		-DINSTALL_LIBDIR=${LIBDIR} \
		-DINTERPOL_TABLES_PATH=/usr/share/emos \
		-DBUFR_TABLES_PATH=/usr/share/emos/bufrtables \
		-DTEST_BUFR_TABLES_PATH=${CURDIR}/bufrtables

override_dh_auto_install:
	cd obj-* && $(MAKE) install
	for d in debian/tmp/bin/* ; do \
		( chrpath -d $$d || echo "Ignoring non-ELF file errors") ; done
	chrpath -d debian/tmp/lib/*.0d
	(cd $(DESTDIR)/share/libemos/tables/bufrtables && sh ./links.sh)
	# delete broken symlinks
	( cd $(DESTDIR)/share/libemos/tables/bufrtables/ && file * | grep broken | cut -f1 -d: | xargs rm )
	# Now in libeccodes
	rm -f debian/tmp/bin/bufr_filter
	# Fix broken paths 
	cat ${CMAKE_DIR}/libemos-targets-release.cmake | \
		sed -e 's%libemos.a%libemos.so%' | \
		sed -e 's%libemosR64.a%libemosR64.so%' | \
		sed -e 's%$${_IMPORT_PREFIX}/bin%/usr/bin%' | \
		sed -e 	's%$${_IMPORT_PREFIX}/lib%$(LIBDIR)%' > ${CMAKE_DIR}/tmp
	mv ${CMAKE_DIR}/tmp ${CMAKE_DIR}/libemos-targets-release.cmake
	# Change default from emos to emos_shared to link against shared libs in metview, etc.
	grep -v LIBEMOS_SELF_LIBRARIES ${CMAKE_DIR}/libemos-config.cmake | \
		sed -e 's%.*set( libemos_BASE_DIR.*%set( libemos_BASE_DIR /usr )%' > ${CMAKE_DIR}/tmp
	mv ${CMAKE_DIR}/tmp ${CMAKE_DIR}/libemos-config.cmake  
	echo >> ${CMAKE_DIR}/libemos-config.cmake 
	echo "set( LIBEMOS_SELF_LIBRARIES    "emos_shared" )" >> ${CMAKE_DIR}/libemos-config.cmake