default: LnGamma.svg
LnGamma.svg: lngamma.gpi out.lngamma.txt
	gnuplot $<
out.lngamma.txt: main.exe
	mono $< > $@ 2>log
main.exe: main.cs matlib.dll
	mcs $< -reference:matlib.dll
matlib.dll: lngamma.cs
	mcs $< -target:library -out:$@
clean:
	rm -rf *.exe *.dll *.svg out* log* lngamma.gpi
lngamma.gpi: Makefile
	echo 'set term svg fsize 18 background rgb "white"' > $@
	echo 'set title "Logarithm of gamma-function lngamma(x)'  >> $@
	echo 'set key bottom right'  >> $@
	echo 'set tics out'  >> $@
	echo 'set grid'  >> $@
	echo 'set xzeroaxis'  >> $@
	echo 'set yzeroaxis'  >> $@
	echo 'set xlabel "x"'  >> $@
	echo 'set ylabel "y"'  >> $@
	echo 'set log x'  >> $@
	echo 'set log y'  >> $@
	echo 'ls(z)=z*log(z)-z-0.5*log(z/2*pi)' >>$@
	echo 'set out "LnGamma.svg"'  >> $@
	echo 'plot [][] \' >>$@
	echo ' "out.lngamma.txt" with lines title "lngamma(x)"\' >> $@
	echo ',"out.lngamma.txt" using ($$1):(ls($$1))\' >> $@
	echo '  with lines title "Stirling formula"' >> $@

PI := 3.14159265359
test:
	echo $(PI)