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	#
	# @file Makefile
	#
	# @brief Makefile for the fft library
	#
	# @copyright
	# Copyright (©) 2021 EPFL (Ecole Polytechnique Fédérale de Lausanne)
	# SPC (Swiss Plasma Center)
	#
	# spclibs is free software: you can redistribute it and/or modify it under
	# the terms of the GNU Lesser General Public License as published by the Free
	# Software Foundation, either version 3 of the License, or (at your option)
	# any later version.
	#
	# spclibs is distributed in the hope that it will be useful, but WITHOUT ANY
	# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
	# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	#
	# You should have received a copy of the GNU Lesser General Public License
	# along with this program. If not, see <https://www.gnu.org/licenses/>.
	#
	# @authors
	# (in alphabetical order)
	# @author Trach-Minh Tran <trach-minh.tran@epfl.ch>
	#
	FFTW=$(FFTW_HOME)
	F90 = ifort
	LD = ifort

	debug = -g -traceback -CB
	optim = -O3

	OPT=$(debug)
	#OPT=$(optim)

	F90FLAGS = $(OPT) -Dfft_w3 -I$(FFTW)/include
	LDFLAGS = $(OPT) -L. -L$(FFTW)/lib

	LIBS = -lfft -lfftw3

	.SUFFIXES:
	.SUFFIXES: .o .c .F90 .f90 .f

	.f90.o:
	$(F90) $(F90FLAGS) -c $<
	.F90.o:
	$(F90) $(F90FLAGS) -c $<
	.f.o:
	$(F90) $(F90FLAGS) -c $<

	all: tfft

	lib: libfft.a

	libfft.a: fft_fftw.o
	xiar r $@ $?
	ranlib $@

	tfft: tfft.o
	$(LD) $(LDFLAGS) -o $@ tfft.o fft_fftw.o $(LIBS)

	tfft.o: lib

	clean:
	rm -f .o .mod *~ a.out

	distclean: clean
	rm -f tfft