CFLAGS = -Wall -std=gnu1x -I../matrix.gc
LDLIBS = -lgc -lm

all:out.txt
	cat $<

out.txt:main
	./$< > $@
main: main.o matrix.o QR_givens.o
main.o matrix.o: ../matrix.gc/matrix.h
matrix.o: ../matrix.gc/matrix.c
	$(CC) -c $(CFLAGS) $< -o $@

times:times.svg
out.times.txt: main Makefile
	cat /dev/null > $@
	for n in `seq 150 10 250`;\
	do time --format "$$n %U" --append --output $@ ./main $$n;\
	done

times.svg: out.times.txt
	echo '\
	set term svg background rgb "white"; \
	set out "$@"; \
	set xlabel "matrix size"; \
	set ylabel "Givens QR-factorization time, sec"; \
	set title "Givens QR-factorization time as function of matrix size (`uname -m`)"; \
	set key left; \
	f(x)=b+(x/a)**3; \
	b=0.1; a=10; \
	fit f(x) "$<" via b,a; \
	T = sprintf("fit: %4.1f+(n/%3.0f)^3",b,a); \
	plot "$<" title "measurement", f(x) title T; \
	'|tee log.gpi|gnuplot

clean:
	find . -type f -executable -delete
	rm -f *.o out* log* *.log *.svg