target = udonge.pdf tewi.pdf
PS2PDF = gs -q -dSeed=`date +'%s'` -dNOPAUSE -dBATCH -sDEVICE=pdfwrite

all: $(target)

udonge.pdf: udonge.ps
	$(PS2PDF) -sOutputFile=$@ $<

tewi.pdf: tewi.ps
	$(PS2PDF) -sOutputFile=$@ $<

field.exe: field.c
	gcc -Wall -ansi -pedantic $< -o $@

clean:
	-rm -f $(target)

backup:
	-rm -f backup.tar.gz
	tar cf backup.tar *.ps *.c *.txt Makefile
	gzip -9 backup.tar