# NOTE: only tested in GNU/Linux.

## Binary dependencies.

CC = gcc
AR = ar
LEXER = re2c
PARSER = lemon


## Paths.

PREFIX = /usr/local
bindir = $(PREFIX)/bin
libdir = $(PREFIX)/lib
includedir = $(PREFIX)/include/lsup_rdf
CALLGRIND_DUMP = /tmp/lsup_callgrind.%p.out

INCLUDE_BASE = . -Iinclude -Iext/xxHash -Iext/openldap/libraries/liblmdb \
	-Iext/tpl/src -Iext/uthash/src -Iext/log/src
INCLUDE = -I$(INCLUDE_BASE)
CFLAGS += -Wall -fPIC -MMD -DLOG_USE_COLOR $(INCLUDE)
TEST_CFLAGS = -Itest -O0 -g3 -DDEBUG
# NOTE: -luuid is a Linux system library. Other OS's might need a different
# link or a non-system library built.
LDFLAGS = -Lext/openldap/libraries/liblmdb -Lext/xxHash \
		  -llmdb -lxxhash -luuid

CODEC_DIR = src/codec
#CODEC_SRC = $(wildcard src/codec/*_parser.c)
CODEC_SRC = $(wildcard src/codec/*_grammar.c) \
	  		$(wildcard src/codec/*_parser.c)
CODEC_OBJ = $(CODEC_SRC:.c=.o)

# External sources compiled in core object.
EXT_SRC = $(wildcard ext/log/src/*.c) \
	  	  $(wildcard ext/tpl/src/*.c)

# External headers of libraries compiled in core.
EXT_H = $(wildcard ext/log/src/*.h) \
	  	$(wildcard ext/tpl/src/*.h) \
	  	$(wildcard ext/uthash/src/*.h)

SRC = $(EXT_SRC) $(wildcard src/*.c)
#CODEC_OBJ = $(wildcard src/codec/*.o)
OBJ = $(SRC:.c=.o) $(CODEC_OBJ)

TEST_SRC = $(wildcard test/*.c) test.c
#TEST_OBJ = $(TEST_SRC:.c=.o)

DEPLIBS = libxxhash liblmdb
LIBS = liblsuprdf.a liblsuprdf.so

# For visual dep graph.
DEPS := $(shell echo "${INCLUDE_BASE}" | sed -e 's/ -I/,/g')
DOCS = docs


## Rules.

all: $(DEPLIBS) $(LIBS)

liblsuprdf.a: $(OBJ)
	$(AR) rs $@ $^

liblsuprdf.so: $(OBJ)
	$(CC) -shared $(LDFLAGS) -o $@ $^

$(CODEC_OBJ): $(CODEC_SRC)

%_parser.c: %_lexer.re %_grammar.c
	$(LEXER) $< -o $@ -T --case-ranges

%_grammar.c: %_grammar.y
	$(PARSER) $< -q -m -T$(CODEC_DIR)/lempar.c -d$(CODEC_DIR)


# Build all external dependencies in core object.
core.o: core.c $(EXT_SRC) $(EXT_H)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^

# Ext libraries compiled as shared objects.

.PHONY: libxxhash
libxxhash:
	$(MAKE) -C ext/xxHash
		
.PHONY: liblmdb
liblmdb:
	$(MAKE) -C ext/openldap/libraries/liblmdb

install: all
	mkdir -p $(DESTDIR)$(libdir)
	mkdir -p $(DESTDIR)$(includedir)
	cp liblsuprdf.* $(DESTDIR)$(libdir) && \
		cp include/*.h $(EXT_H) $(DESTDIR)$(includedir)
	
.PHONY: clean
clean:
	rm -rf src/*.[aod] ./*[aod] src/codec/*[aod]

.PHONY: uninstall
uninstall:
	rm -f $(DESTDIR)$(libdir)/liblsuprdf.*
	rm -rf $(DESTDIR)$(includedir)

bin/test: $(OBJ) $(TEST_SRC) $(DEPLIBS)
	$(CC) \
		$(CFLAGS) $(TEST_CFLAGS) $(SRC) $(CODEC_SRC) test.c -L. $(LDFLAGS) \
		-o bin/test

.PHONY: debug
debug: bin/test
	exec gdb bin/test

.PHONY: test
test: bin/test
	exec bin/test

lint:
	splint \
		$(INCLUDE) -Itest \
		-DUINT_MAX=0xFFFFFFFFUL \
		-nullpass \
		-posix-lib \
		test.c


.PHONY: memcheck
memcheck:
	valgrind \
	--leak-check=full --show-leak-kinds=all --track-origins=yes \
	--log-file=/tmp/lsup_valgrind.log \
	./bin/test
	echo "Memcheck complete. Valgrind log is at /tmp/lsup_valgrind.log"


memtest: test memcheck


bin/profile: $(OBJ) $(DEPLIBS)
	$(CC) \
		$(CFLAGS) -g -DTESTING $(SRC) $(CODEC_SRC) profile.c -L. $(LDFLAGS) \
		-o bin/profile


.PHONY: profile
profile: bin/profile
	exec valgrind --tool=callgrind --callgrind-out-file="$(CALLGRIND_DUMP)" \
		bin/profile 10000 && \
		echo "Profile dump written at $(CALLGRIND_DUMP)"


.PHONY: pytest
py_test:
	pip3 install --user . && \
	python3 test/cpython_test.py


# Build a visual dependency graph.
# Requires cinclude2dot (https://www.flourish.org/cinclude2dot) and Graphviz.
depgraph: src/* include/*
	cinclude2dot --merge=module --include=$(DEPS) \
		--exclude='test|ext' >| $(DOCS)/dev/deps.dot
	dot $(DOCS)/dev/deps.dot -Tpdf >| $(DOCS)/dev/deps.pdf