GNUmakefile

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.DELETE_ON_ERROR:

MY_DOC = How-to-Entangle-Craytons

CTANGLE = ctangle
CTANGLEFLAGS = -v

CWEAVE = cweave
CWEAVEFLAGS = -v

PDFTEX = pdftex
PDFTEXFLAGS =

QPDF = qpdf
QPDFFLAGS =

CC = cc
CFLAGS = -g

.PHONY: pdf default
pdf default: $(MY_DOC).pdf

.PHONY: program
program: $(MY_DOC)

.PHONY: all
all: pdf program

%.c: %.w
	$(CTANGLE) $(CTANGLEFLAGS) $(<) - $(@)

%.tex: %.w
	$(CWEAVE) $(CWEAVEFLAGS) $(<) - $(@)

%.pdf: %.tex
	$(PDFTEX) $(PDFTEXFLAGS) $(<)
	mv $(@) $(MY_DOC).tmp1.pdf
	$(QPDF) $(QPDFFLAGS) $(MY_DOC).tmp1.pdf --pages . r1 . 1-r2 -- \
		$(MY_DOC).tmp2.pdf
	rm $(MY_DOC).tmp1.pdf
	mv $(MY_DOC).tmp2.pdf $(@)

$(MY_DOC): $(MY_DOC).c
	$(CC) $(CFLAGS) -o $(@) $(<) -lm

$(MY_DOC).tex: $(MY_DOC)-revision.txt

$(MY_DOC)-revision.txt: $(MY_DOC).w
	date -u > $(@)

.PHONY: clean
clean:
	rm -f $(MY_DOC){,.{c,idx,log,scn,toc,tex}}