.PHONY: default
.SUFFIXES:
MAKEFLAGS+=--no-builtin-rules

NODEPS=clean

OBJECT_DIR=obj
SOURCE_DIR=src

EMPTY:=
SPACE:=$(EMPTY) $(EMPTY)
COMMA:=,

default: all
all: docs arctic

DOCUMENTS=$(shell find doc/ -name '*.md')

HTMLDOCS=$(patsubst doc/%.md,%.html,$(DOCUMENTS))
PDFDOCS=$(patsubst doc/%.md,%.pdf,$(DOCUMENTS)) cheatsheet.pdf

docs: $(HTMLDOCS) $(PDFDOCS)

%.html: doc/%.md
	multimarkdown -t html $^ -o $@

%.tex: %.md
	multimarkdown -t latex $^ | sed 's/^\[/{[}/g' > $@

%.pdf: doc/%.tex doc/arctic-leader.tex doc/arctic-begin.tex doc/arctic-footer.tex
	# cd doc && latexmk -pdf -xelatex -use-make $*.tex && mv $*.pdf ../
	cd $$(dirname $<) && xelatex -interaction=batchmode $*.tex && mv $*.pdf ../

GENERATED_M4=$(shell find $(SOURCE_DIR)/ -name '*.m4')
GENERATED_FS=$(patsubst %.m4,%,$(GENERATED_M4))

%: %.m4 misc/utils.m4
	m4 $< > $@

# TODO: fix the structure so this is easier. the JIT libs should become ASM
# libs, while the actual JIT sources only get included on whatever the native
# arch is (tunable with ARCH=... in make)
MAIN_SOURCES=$(shell find $(SOURCE_DIR)/ -name '*.c' -not -path '$(SOURCE_DIR)/jit/*')
MAIN_OBJECTS=$(patsubst $(SOURCE_DIR)/%.c,$(OBJECT_DIR)/%.o,$(MAIN_SOURCES))
MAIN_DEPENDS=$(patsubst $(SOURCE_DIR)/%.c,$(OBJECT_DIR)/%.d,$(MAIN_SOURCES))

ifeq (0, $(words $(findstring $(MAKECMDGOALS), $(NODEPS))))
ifeq (,$(findstring print-,$(MAKECMDGOALS)))
$(info Including depends files: $(MAIN_DEPENDS))
include $(MAIN_DEPENDS)
endif
endif

$(OBJECT_DIR):
	mkdir $@

$(OBJECT_DIR)/%.d: $(SOURCE_DIR)/%.c | $(OBJECT_DIR) $(GENERATED_FS)
	$(CC) $(CFLAGS) -MM -MT '$(patsubst $(SOURCE_DIR)/%.c,$(OBJECT_DIR)/%.o,$<)' $< -MF $@

$(OBJECT_DIR)/%.o: $(SOURCE_DIR)/%.c | $(OBJECT_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

arctic: $(MAIN_OBJECTS)
	$(CC) $(LDFLAGS) $^ -o $@

X86_64_BIT_REGISTERS=RAX RBX RCX RDX RSI RDI RBP RSP R8 R9 R10 R11 R12 R13 R14 R15
src/jit/x86_64_mov_opcodes.h:
	echo '#ifndef X86_64_MOV_OPCODES_H' > $@
	echo '#define X86_64_MOV_OPCODES_H' >> $@
	echo >> $@
	for dstreg in {$(subst $(SPACE),$(COMMA),$(X86_64_BIT_REGISTERS))}; do \
		for srcreg in {$(subst $(SPACE),$(COMMA),$(X86_64_BIT_REGISTERS))}; do \
			echo "mov $$srcreg,$$dstreg" | ./tools/x86_64dump | \
				sed 's/../ X(0x&)/g' | \
				sed "s/.*/#define MOV_$${srcreg}_$${dstreg}&/" >> $@; \
		done; \
	done
	echo >> $@
	echo '#endif /* X86_64_MOV_OPCODES_H */' >> $@


clean:
	-rm $(patsubst doc/%.md,doc/%.aux,$(DOCUMENTS))
	-rm $(patsubst doc/%.md,doc/%.xdv,$(DOCUMENTS))
	-rm $(patsubst doc/%.md,doc/%.out,$(DOCUMENTS))
	-rm $(MAIN_OBJECTS)
	-rm $(MAIN_DEPENDS)
	-rm arctic

print-%:
	@echo '$*=$($*)'