CC       = /usr/bin/gcc
CFLAGS   =
LD       = $(CC)
LDFLAGS  = -lm
RM       = /bin/rm
EXAMPLES = rectangle sharp sinusoid
EXECS = $(EXAMPLES:%=gen_data_%)
Z_FIGURES = rectangle.png sinusoid.png
XYZ_FIGURES = sharp.png
FIGURES = $(Z_FIGURES) $(XYZ_FIGURES)

all: $(FIGURES)

%.o : %.c
	$(CC) -c $(CFLAGS) -o $@ $^

$(EXECS) : % : %.o
	$(LD) $(LDFLAGS) -o $@ $^

$(Z_FIGURES) : %.png : gen_data_% plot_image.py
	./$< | ./plot_image.py -t "$(<:%.png=%)" -s 300,200 -o "$@"

$(XYZ_FIGURES) : %.png : gen_data_% plot_image.py
	./$< | ./plot_image.py -t "$(<:%.png=%)" --xyz -o "$@"

clean:
	$(RM) -f *.o $(EXECS) $(FIGURES)

# Interesting Makefile sections
#   4.12.1 Syntax of Static Pattern Rules