ifneq ($(FC), ifort)
ifneq ($(FC), gfortran)

ifneq ($(shell which ifort 2>/dev/null),)
FC = ifort
endif

ifneq ($(shell which gfortran 2>/dev/null),)
FC = gfortran
endif

endif
endif


ifndef FFLAGS

ifeq ($(FC), gfortran)
FFLAGS = -std=f2008 -Wall -pedantic -fbounds-check -fimplicit-none \
	 -ffree-form -O2 -I/usr/include -lfftw3 -lm
endif

ifeq ($(FC), ifort)
FFLAGS = -std08  -module . -implicitnone -pedantic -check bounds \
	 -O2 -I/usr/include -lfftw3 -lm
endif

endif

all : fourier

pngs : res/f1_dft.png res/f1_original.png res/f2_dft.png \
       res/f2_filtered.png res/f2_original.png

fourier : src/fourier.f90
	$(FC) $(FFLAGS) $^ -o $@

res/f1_original.txt : fourier
	./fourier f1 > res/f1_original.txt

res/f1_dft.txt : fourier
	./fourier f1 dft > res/f1_dft.txt

res/f2_original.txt : fourier
	./fourier f2 > res/f2_original.txt

res/f2_dft.txt : fourier
	./fourier f2 dft > res/f2_dft.txt

res/f2_filtered.txt : fourier
	./fourier f2 filtered > res/f2_filtered.txt

res/%.png : src/%.gnuplot res/%.txt
	gnuplot -c $<

clean :
	-rm fourier res/*.txt

.PHONY : all clean pngs