#!/usr/bin/make -f

ARCHITECTURE := $(shell dpkg-architecture -qDEB_HOST_ARCH)
DEB_HOST_GNU_TYPE  ?= $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
DEB_BUILD_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)

CPPFLAGS:=$(shell dpkg-buildflags --get CPPFLAGS)
CFLAGS:=$(shell dpkg-buildflags --get CFLAGS)
LDFLAGS:=$(shell dpkg-buildflags --get LDFLAGS) -Wl,--as-needed

ifeq (libfftw3-quad3,$(findstring libfftw3-quad3, $(shell dh_listpackages)))
QUAD := quad
else
QUAD :=
endif
ifeq (libfftw3-long3,$(findstring libfftw3-long3, $(shell dh_listpackages)))
LONG := long
else
LONG :=
endif
PREC := single double $(LONG) $(QUAD)

# old configure stuff needs a --target
ifeq ($(DEB_BUILD_GNU_TYPE), $(DEB_HOST_GNU_TYPE))
  archconfflags := $(archconfflags) --build $(DEB_HOST_GNU_TYPE)
else
  archconfflags := $(archconfflags) --build $(DEB_BUILD_GNU_TYPE) --host $(DEB_HOST_GNU_TYPE)
endif

#--enable-k7             enable AMD K7 optimizations, including 3dNow! (single precision)
#--enable-sse            enable SSE optimizations (single precision only)
#--enable-sse2           enable SSE2 optimizations (double precision only)
#--enable-altivec        enable Altivec optimizations (single precision only)

ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
	NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
	MAKEFLAGS += -j$(NUMJOBS)
endif
ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
	CFLAGS += -O0
else
	CFLAGS += -O2
ifneq (,$(filter $(ARCHITECTURE), i386 amd64 x32))
	archconfflags_single := --enable-sse --enable-avx
	archconfflags_double := --enable-sse2 --enable-avx
endif
# no avx support in debian yet see #674760
ifneq (,$(filter $(ARCHITECTURE), kfreebsd-i386 kfreebsd-amd64))
	archconfflags_single := --enable-sse
	archconfflags_double := --enable-sse2
endif
ifeq ($(ARCHITECTURE), powerpc)
	archconfflags_single := --enable-altivec
endif
ifneq (,$(filter $(ARCHITECTURE), armhf arm64))
	archconfflags_single := --enable-neon --with-slow-timer
endif
endif

ifneq (,$(findstring nog77,$(DEB_BUILD_OPTIONS)))
	archconfflags := $(archconfflags) F77="gfortran" 
else
	archconfflags := $(archconfflags) F77="gfortran -ff2c"
endif

SETCFLAGS := CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' CPPFLAGS='$(CPPFLAGS)'

# common configure options
archconfflags := $(archconfflags) --prefix=/usr --enable-shared --enable-threads --enable-openmp --enable-mpi --libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH) MPILIBS="$(shell mpicc --showme:link)"

build-arch:
	dh_autoreconf
	# single precision
	$(SETCFLAGS) ./configure --enable-single $(archconfflags) $(archconfflags_single)
	$(MAKE)
	( cd tests ; $(MAKE) smallcheck )
	$(MAKE) install DESTDIR=`pwd`/debian/tmp-single
	#
	# double precision
	$(SETCFLAGS) ./configure $(archconfflags) $(archconfflags_double)
	$(MAKE)
	( cd tests ; $(MAKE) smallcheck )
	$(MAKE) install DESTDIR=`pwd`/debian/tmp-double
	# long double precision
ifeq (long,$(LONG))
	$(SETCFLAGS) ./configure --enable-long-double $(archconfflags)
	$(MAKE)
	( cd tests ; $(MAKE) smallcheck )
	$(MAKE) install DESTDIR=`pwd`/debian/tmp-long;
endif
ifeq (quad,$(QUAD))
	# quad precision
	$(SETCFLAGS) ./configure $(archconfflags) --enable-quad-precision --disable-mpi
	$(MAKE)
ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
	( cd tests ; $(MAKE) smallcheck )
endif
	$(MAKE) install DESTDIR=`pwd`/debian/tmp-quad
endif
	touch build-arch

build-indep:
	-(cd doc ; $(MAKE) -j1 -k clean)
	-rm -f doc/*.info* doc/rfftwnd.png doc/html/*
	[ -f doc/Makefile ] || ./configure
	cd doc/FAQ && $(MAKE) -j1 fftw-faq.html fftw-faq.ascii
	cd doc && $(MAKE) -j1 && $(MAKE) -j1 html
	touch build-indep

build: build-stamp
build-stamp: build-arch

clean: clean1st
clean1st:
	dh_testdir
	dh_testroot
	rm -f build-arch build-indep
	(cd doc ; [ ! -f Makefile ] || $(MAKE) -k clean)
	[ ! -f Makefile ] || $(MAKE) distclean
	-rm -f *.pc tools/*wisdom tools/*wisdom.1
	-find . -name "*.la" | xargs -r rm -f
	-rm -f test_long_long-double
	-rm -f config.cache config.status config.log
	-rm -rf debian/tmp-single debian/tmp-double debian/tmp-long debian/tmp-quad
	rm -f mpi/mpi-bench
	chmod -R g-s .
	dh_autoreconf_clean
	dh_clean

binary-indep: build-indep
	# build fftw3-doc
	dh_prep -i
	dh_testdir
	dh_testroot
	dh_installdocs -i README NEWS
	dh_installinfo -i
	dh_installchangelogs -i ChangeLog
	dh_compress -i
	dh_installdeb -i
	dh_gencontrol -i
	dh_md5sums -i
	dh_builddeb -i -- -Zxz

binary-arch: build-arch
	# build fftw3
	dh_prep -a
	dh_installdocs -a -A README NEWS debian/README.Debian
	dh_installchangelogs -a -XChangeLog
	dh_installexamples -a
	dh_installdirs -a
	set -e && for s in $(PREC); do \
	  dh_install -plibfftw3-bin --sourcedir=debian/tmp-$$s; \
	  dh_install -plibfftw3-$${s}3 --sourcedir=debian/tmp-$$s; \
	  dh_install -plibfftw3-dev --sourcedir=debian/tmp-$$s; \
	  if [ $$s != "quad" ]; then \
	    dh_install -plibfftw3-mpi3 --sourcedir=debian/tmp-$$s; \
	    dh_install -plibfftw3-mpi-dev --sourcedir=debian/tmp-$$s; \
	    rm debian/libfftw3-$${s}3/usr/lib/$(DEB_HOST_MULTIARCH)/libfftw3*mpi*; \
	  fi; \
	done
	rm debian/libfftw3-dev/usr/lib/$(DEB_HOST_MULTIARCH)/libfftw3*mpi* \
	   debian/libfftw3-dev/usr/include/*mpi*
	chrpath --delete debian/libfftw3-mpi3/usr/lib/$(DEB_HOST_MULTIARCH)/libfftw3*mpi*so*

	find $(CURDIR)/debian/libfftw3-dev -type d -empty -delete

	dh_installman -a
	dh_strip -a
	dh_compress -a
	dh_fixperms -a
	dh_makeshlibs -a
	# 3.3.5 added new symbols, tighten shlibs for partial upgrades
	set -e && for s in $(PREC); do \
	  dh_makeshlibs -plibfftw3-$${s}3 -V "libfftw3-$${s}3 (>= 3.3.5)"; \
	done
	dh_installdeb -a
	dh_shlibdeps -a
	dh_gencontrol -a
	dh_md5sums -a
	dh_builddeb -a -- -Zxz

binary: binary-indep binary-arch

.PHONY: binary binary-arch binary-indep clean
.NOTPARALLEL: