PREFIX?=/usr/local
BINDIR?=$(PREFIX)/bin
MANDIR?=$(PREFIX)/share/man
STRIP?=strip

#FEATURES+=-DWANT_V4_ONLY
#FEATURES+=-DWANT_ACCESSLIST_BLACK
#FEATURES+=-DWANT_ACCESSLIST_WHITE
#FEATURES+=-DWANT_DYNAMIC_ACCESSLIST

#FEATURES+=-DWANT_SYNC_LIVE
#FEATURES+=-DWANT_IP_FROM_QUERY_STRING

#FEATURES+=-DWANT_RESTRICT_STATS
#FEATURES+=-DWANT_IP_FROM_PROXY
#FEATURES+=-DWANT_LOG_NUMWANT
#FEATURES+=-DWANT_MODEST_FULLSCRAPES
#FEATURES+=-DWANT_SPOT_WOODPECKER
#FEATURES+=-DWANT_SYSLOGS
#FEATURES+=-DWANT_DEV_RANDOM
FEATURES+=-DWANT_FULLSCRAPE

# Buckets the torrent table is split into, as a power of two, 8 to 16. More
# buckets make inserting a new torrent cheaper and cost memory, which is worth
# it for a tracker carrying millions of torrents and not for one carrying
# thousands. DESIGN has the measurements.
FEATURES+=-DOT_BUCKET_COUNT_BITS=10

#FEATURES+=-D_DEBUG_HTTPERROR
#FEATURES+=-D_DEBUG_RANDOMTORRENTS

# Compression support, off unless included. Each file carries a second switch
# to compress even where the client did not ask.
include Mk/gzip.mk
#include Mk/zstd.mk

# arc4random is part of libc on the BSDs, on macOS and on glibc 2.36 and
# newer. On an older glibc or on musl it comes from libbsd instead.
#OT_LDLIBS+=-lbsd

CFLAGS?=-O3

OT_CFLAGS+=-Wall -Wextra -Wwrite-strings -pipe -pthread
OT_LDFLAGS+=-pthread

OPTS_debug=-D_DEBUG -g -ggdb

COMPILE=$(CPPFLAGS) $(OT_CFLAGS) $(FEATURES)
LINK=$(LDFLAGS) $(OT_LDFLAGS) $(LDLIBS) $(OT_LDLIBS)

BINARY=opentracker
HEADERS=src/trackerlogic.h src/ot_urlencoded.h src/ot_batch.h src/ot_buf.h src/ot_event.h src/ot_fdstate.h src/ot_fmt.h src/ot_hex.h src/ot_ip.h src/ot_config.h src/ot_scan.h src/ot_socket.h src/ot_tcp.h src/ot_worker.h src/ot_workqueue.h src/ot_mutex.h src/ot_random.h src/ot_stats.h src/ot_vector.h src/ot_clean.h src/ot_udp.h src/ot_iovec.h src/ot_fullscrape.h src/ot_accesslist.h src/ot_http.h src/ot_livesync.h src/ot_rijndael.h
SOURCES=src/opentracker.c src/trackerlogic.c src/ot_urlencoded.c src/ot_batch.c src/ot_buf.c src/ot_event.c src/ot_fdstate.c src/ot_fmt.c src/ot_hex.c src/ot_ip.c src/ot_config.c src/ot_scan.c src/ot_socket.c src/ot_tcp.c src/ot_worker.c src/ot_workqueue.c src/ot_mutex.c src/ot_random.c src/ot_stats.c src/ot_vector.c src/ot_clean.c src/ot_udp.c src/ot_iovec.c src/ot_fullscrape.c src/ot_accesslist.c src/ot_http.c src/ot_livesync.c src/ot_rijndael.c
BINARIES=$(BINARY) $(BINARY).debug

# Everything is built in one go from sources, so there are no object files to
# carry a flag change over into the next build. The stamp holds the flags the
# last build used, which covers FEATURES passed in the environment and a moved
# HEAD. It is only written when they differ.
BUILDSTAMP=.buildstamp
BUILDDEPS=Makefile $(BUILDSTAMP)

all: $(BINARY) $(BINARY).debug

$(BINARY): $(SOURCES) $(HEADERS) $(BUILDDEPS)
	$(CC) -o $@ $(CFLAGS) $(COMPILE) $(SOURCES) $(LINK)
	$(STRIP) $@

$(BINARY).debug: $(SOURCES) $(HEADERS) $(BUILDDEPS)
	$(CC) -o $@ $(OPTS_debug) $(COMPILE) $(SOURCES) $(LINK)

$(BUILDSTAMP): FORCE
	@echo "$(CFLAGS) $(COMPILE) $(LINK)" | cmp -s - $@ 2>/dev/null || echo "$(CFLAGS) $(COMPILE) $(LINK)" > $@

clean:
	rm -rf $(BINARIES) $(BINARIES:=.dSYM) $(BUILDSTAMP) *.o *~ src/*.o src/*~

install: $(BINARY)
	install -d $(DESTDIR)$(BINDIR) $(DESTDIR)$(MANDIR)/man1 $(DESTDIR)$(MANDIR)/man5
	install -m 755 $(BINARY) $(DESTDIR)$(BINDIR)
	install -m 644 man1/opentracker.1 $(DESTDIR)$(MANDIR)/man1
	install -m 644 man5/opentracker.conf.5 $(DESTDIR)$(MANDIR)/man5

FORCE:

.PHONY: all clean install FORCE

include Mk/tests.mk
include Mk/release.mk
include Mk/proxy.mk