CC=g++
cc=gcc
FC=gfortran
CFLAGS=-c -Wall -O3

TARGETS=spring-euler spring-euler2 spring-euler-cromer \
        spring-midpoint spring-midpoint-fn spring-midpoint-fnc \
        spring-midpoint-fnf

all: ${TARGETS} euler.pdf midpoint.pdf

spring-euler: spring-euler.o 
	${CC} $^ -o $@

spring-euler2: spring-euler2.o
	${CC} $^ -o $@

spring-euler-cromer: spring-euler-cromer.o
	${CC} $^ -o $@

spring-midpoint: spring-midpoint.o 
	${CC} $^ -o $@

spring-midpoint-fn: spring-midpoint-fn.o 
	${CC} $^ -o $@

spring-midpoint-fnc: spring-midpoint-fnc.o 
	${cc} -lm $^ -o $@

spring-midpoint-fnf: spring-midpoint-fnf.o 
	${FC} $^ -o $@

%.o: %.cpp
	${CC} ${CFLAGS} $^

%.o: %.c
	${cc} ${CFLAGS} $^

%.o: %.f90
	${FC} ${CFLAGS} $^

euler.pdf: spring.dat spring.gnu
	gnuplot spring.gnu

spring.dat: spring-euler
	./spring-euler > spring.dat

midpoint.pdf: spring_midpoint.dat plot_spring_midpoint.py
	python plot_spring_midpoint.py

spring_midpoint.dat: spring-midpoint
	./spring-midpoint > spring_midpoint.dat

clean:
	-rm *.o 
	-rm ${TARGETS}
	-rm euler.pdf
	-rm euler.eps
	-rm midpoint.pdf
	-rm spring.dat
	-rm spring_midpoint.dat
# The leading dash "-" means to ignore errors 
# i.e. not stop the cleaning process if, say, euler.eps
# is missing