### -*-makefile-*-

all:
clean::
.PHONY: all clean

TARGETS			 =
CLEAN			 =

CTANGLE			 = ctangle
CWEAVE			 = cweave
LATEX			 = pdflatex
CC			 = gcc
OPTIMIZE		 = -Og -g3
WARNINGS		 = -pedantic -Wall
CFLAGS			 = -std=gnu99 $(OPTIMIZE) $(WARNINGS)
LD			 = gcc
LDFLAGS			 =
-include local.mk

V			 = 0
V_AT			 = $(V_AT.$V)
V_AT.0			 = @

v-tag			 = $(call v-tag.$V,$1,$2)
v-tag.0			 = @printf "  %-8s %s\n" '$1' '$2';

SRCEXT			 =
objify			 = $(addsuffix .o, \
				$(basename \
					$(filter $(addprefix %, $(SRCEXT)), \
						$1)))
CLEAN			+= *.o

compile			 = $(call v-tag,$1,$@)$($1) -c $(CFLAGS) $4 \
				-MD -MF $(2:.o=.d) -o$2 $3
DEPOBJS			 =
CLEAN			+= *.d

SRCEXT			+= .c
%.o: %.c
	$(call compile,CC,$@,$<)

WEBS			 = qp.w
qp_WEBSRCS		 =

qp_WEBSRCS		+= Tbl.h Tbl.c
qp_WEBSRCS		+= qp.h qp.c qp-debug.c
qp_WEBSRCS		+= fn.h fn.c fn-debug.c
qp_WEBSRCS		+= toy.c

ALL_WEBSRCS		 = $(foreach w,$(WEBS:.w=), $($w_WEBSRCS))
CLEAN			+= $(ALL_WEBSRCS)

ALL_PDFS		 = $(WEBS:.w=.pdf)
TARGETS			+= $(ALL_PDFS)
CLEAN			+= $(foreach e,aux idx log out pdf scn tex toc, \
				$(WEBS:.w=.$e))
%.tex: %.w
	$(call v-tag,CWEAVE,$@)$(CWEAVE) $<
.SECONDARY:

%.pdf: %.tex
	$(call v-tag,LATEX,$@)$(LATEX) --interaction=batchmode $<

otherwords		 = $(wordlist 2,$(words $1),$1)

define tangle-web
$$(call otherwords,$$($1_WEBSRCS)): $$(firstword $$($1_WEBSRCS))
$$(firstword $$($1_WEBSRCS)): $1.w
	$$(call v-tag,CTANGLE,$$<)$$(CTANGLE) $$<
endef
$(foreach w,$(WEBS:.w=), $(eval $(call tangle-web,$w)))
%.c: %.w # don't use implicit rule

TARGETS			+= qptoy fntoy

COMMON_SRCS		 =
COMMON_SRCS		+= Tbl.c
COMMON_SRCS		+= toy.c

qptoy_SRCS		 = $(COMMON_SRCS)
qptoy_SRCS		+= qp.c qp-debug.c
qptoy_OBJS		 = $(call objify,$(qptoy_SRCS))
DEPOBJS			+= $(qptoy_OBJS)
qptoy: $(qptoy_OBJS)
	$(call v-tag,LD,$@)$(LD) $(LDFLAGS) -o$@ $+
CLEAN			+= qptoy

fntoy_SRCS		 = $(COMMON_SRCS)
fntoy_SRCS		+= fn.c fn-debug.c
fntoy_OBJS		 = $(call objify,$(fntoy_SRCS))
DEPOBJS			+= $(fntoy_OBJS)
fntoy: $(fntoy_OBJS)
	$(call v-tag,LD,$@)$(LD) $(LDFLAGS) -o$@ $+
CLEAN			+= fntoy

all: $(TARGETS)
clean::; rm -f $(CLEAN)

p:; : $p

-include $(DEPOBJS:.o=.d)