VARDIR := /var/paraslash
MANDIR := $(datarootdir)/man/man1
STRIP := $(CROSS_COMPILE)strip
HOSTCC ?= cc
MKDIR_P := mkdir -p
prefixed_executables := $(addprefix para_, $(executables))

build_date := $(shell date)
uname_s := $(shell uname -s 2>/dev/null || echo "UNKNOWN_OS")
uname_rs := $(shell uname -rs)
cc_version := $(shell $(CC) --version | head -n 1)
GIT_VERSION := $(shell ./GIT-VERSION-GEN git-version.h)

ifeq ("$(origin O)", "command line")
	build_dir := $(O)
else
	build_dir := build
endif
ggo_dir := $(build_dir)/ggo
object_dir := $(build_dir)/objects
dep_dir := $(build_dir)/deps
man_dir := $(build_dir)/man/man1
cmdline_dir := $(build_dir)/cmdline
cmdlist_dir := $(build_dir)/cmdlist
m4depdir := $(build_dir)/m4deps
help2man_dir := $(build_dir)/help2man
hostbin_dir := $(build_dir)/host/bin
m4_ggo_dir := m4/gengetopt
test_dir := t

# sort removes duplicate words, which is all we need here
all_objs := $(sort $(recv_objs) $(filter_objs) $(client_objs) $(gui_objs) \
	$(audiod_objs) $(audioc_objs) $(fade_objs) $(server_objs) \
	$(write_objs) $(afh_objs) $(play_objs))
deps := $(addprefix $(dep_dir)/, $(filter-out %.cmdline.d, $(all_objs:.o=.d)))
m4_deps := $(addprefix $(m4depdir)/, $(addsuffix .m4d, $(executables)))

# now prefix all objects with object dir
recv_objs := $(addprefix $(object_dir)/, $(recv_objs))
filter_objs := $(addprefix $(object_dir)/, $(filter_objs))
client_objs := $(addprefix $(object_dir)/, $(client_objs))
gui_objs := $(addprefix $(object_dir)/, $(gui_objs))
audiod_objs := $(addprefix $(object_dir)/, $(audiod_objs))
audioc_objs := $(addprefix $(object_dir)/, $(audioc_objs))
fade_objs := $(addprefix $(object_dir)/, $(fade_objs))
server_objs := $(addprefix $(object_dir)/, $(server_objs))
write_objs := $(addprefix $(object_dir)/, $(write_objs))
afh_objs := $(addprefix $(object_dir)/, $(afh_objs))
play_objs := $(addprefix $(object_dir)/, $(play_objs))

man_pages := $(patsubst %, $(man_dir)/%.1, $(prefixed_executables))

autocrap := config.h.in configure
tarball_pfx := $(PACKAGE_TARNAME)-$(shell git describe --dirty)
tarball_delete := $(addprefix $(tarball_pfx)/, web .gitignore)
tarball := $(tarball_pfx).tar.bz2

.PHONY: dep all clean clean2 distclean maintainer-clean install man tarball
all: dep $(prefixed_executables) $(man_pages)
dep: $(deps)
man: $(man_pages)
tarball: $(tarball)

include $(m4_ggo_dir)/makefile
include $(test_dir)/makefile.test
ifeq ($(findstring clean, $(MAKECMDGOALS)),)
-include $(deps)
-include $(m4_deps)
endif

$(object_dir) $(man_dir) $(ggo_dir) $(cmdline_dir) $(dep_dir) $(m4depdir) \
		$(help2man_dir) $(hostbin_dir) $(cmdlist_dir):
	$(Q) $(MKDIR_P) $@

# When in doubt, use brute force (Ken Thompson)
TOUPPER = \
$(subst a,A,$(subst b,B,$(subst c,C,$(subst d,D,$(subst e,E,\
$(subst f,F,$(subst g,G,$(subst h,H,$(subst i,I,$(subst j,J,\
$(subst k,K,$(subst l,L,$(subst m,M,$(subst n,N,$(subst o,O,\
$(subst p,P,$(subst q,Q,$(subst r,R,$(subst s,S,$(subst t,T,\
$(subst u,U,$(subst v,V,$(subst w,W,$(subst x,X,$(subst y,Y,\
$(subst z,Z,$1))))))))))))))))))))))))))

CPPFLAGS += -DBINDIR='"$(BINDIR)"'
CPPFLAGS += -DBUILD_DATE='"$(build_date)"'
CPPFLAGS += -DUNAME_RS='"$(uname_rs)"'
CPPFLAGS += -DCC_VERSION='"$(cc_version)"'
CPPFLAGS += -DMAIN_INPUT_FILE_IS_$(*F)
CPPFLAGS += $(arch_cppflags)
CPPFLAGS += -I/usr/local/include
CPPFLAGS += -I$(cmdline_dir)
CPPFLAGS += -I$(cmdlist_dir)

CFLAGS += -Os
CFLAGS += -Wuninitialized
CFLAGS += -Wchar-subscripts
CFLAGS += -Werror-implicit-function-declaration
CFLAGS += -Wmissing-noreturn
CFLAGS += -Wbad-function-cast
CFLAGS += -fno-strict-aliasing

STRICT_CFLAGS = $(CFLAGS)
STRICT_CFLAGS += -g -Wundef -W
STRICT_CFLAGS += -Wredundant-decls
STRICT_CFLAGS += -Wno-sign-compare -Wno-unknown-pragmas
STRICT_CFLAGS += -Wformat -Wformat-security
STRICT_CFLAGS += -Wmissing-format-attribute

LDFLAGS += $(clock_gettime_ldflags)

ifeq ($(uname_s),Linux)
	# these cause warnings on *BSD
	STRICT_CFLAGS += -fdata-sections -ffunction-sections
	STRICT_CFLAGS += -Wstrict-prototypes
	STRICT_CFLAGS += -Wshadow
	STRICT_CFLAGS += -Wunused -Wall
	LDFLAGS += -Wl,--gc-sections
endif

# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
ifeq ("$(origin V)", "command line")
	Q :=
else
	Q := @
endif

$(cmdlist_dir)/%.command_list.h: %.cmd %.c | $(cmdlist_dir)
	@[ -z "$(Q)" ] || echo 'GEN $@'
	$(Q) ./command_util.bash h < $< >$@
$(cmdlist_dir)/%.command_list.man: %.cmd %.c | $(cmdlist_dir)
	@[ -z "$(Q)" ] || echo 'GEN $@'
	$(Q) ./command_util.bash man < $< > $@
$(cmdlist_dir)/%.completion.h: %.cmd %.c | $(cmdlist_dir)
	@[ -z "$(Q)" ] || echo 'GEN $@'
	$(Q) ./command_util.bash compl $(strip $(call TOUPPER,$(*F)))_COMPLETERS \
		$(strip $(call TOUPPER,$(*F)))_COMMANDS	< $< > $@

$(cmdlist_dir)/server.command_list.h \
$(cmdlist_dir)/server.command_list.man \
$(cmdlist_dir)/server.completion.h \
: command.c

$(cmdlist_dir)/afs.command_list.h \
$(cmdlist_dir)/afs.command_list.man \
$(cmdlist_dir)/afs.completion.h \
: afs.c aft.c attribute.c

$(cmdlist_dir)/audiod,command_list.h \
$(cmdlist_dir)/audiod,command_list.man \
$(cmdlist_dir)/audiod,completion.h \
: audiod_command.c

server_command_lists := $(cmdlist_dir)/server.command_list.man \
	$(cmdlist_dir)/afs.command_list.man
audiod_command_lists := $(cmdlist_dir)/audiod.command_list.man
play_command_lists := $(cmdlist_dir)/play.command_list.man

$(man_dir)/para_server.1: $(server_command_lists)
$(man_dir)/para_audiod.1: $(audiod_command_lists)
$(man_dir)/para_play.1: $(play_command_lists)

$(man_dir)/para_server.1: man_util_command_lists := $(server_command_lists)
$(man_dir)/para_audiod.1: man_util_command_lists := $(audiod_command_lists)
$(man_dir)/para_play.1: man_util_command_lists := $(play_command_lists)

$(man_dir)/para_%.1: $(ggo_dir)/%.ggo man_util.bash | $(man_dir) $(help2man_dir)
	@[ -z "$(Q)" ] || echo 'MAN $<'
	$(Q) \
		COMMAND_LISTS="$(man_util_command_lists)" \
		FILTERS="$(filters)" \
		GENGETOPT=$(GENGETOPT) \
		GGO_DIR=$(ggo_dir) \
		HELP2MAN=$(HELP2MAN) \
		HELP2MAN_DIR=$(help2man_dir) \
		RECEIVERS="$(receivers)" \
		VERSION="$(GIT_VERSION)" \
		WRITERS="$(writers)" \
		./man_util.bash $@

$(hostbin_dir)/error2: error2.c | $(hostbin_dir)
	@[ -z "$(Q)" ] || echo 'HCC $<'
	$(Q) $(HOSTCC) -o $@ $<
error2.h: $(hostbin_dir)/error2 config.h
	@[ -z "$(Q)" ] || echo 'ER2 $<'
	@echo "$(object_executable_matrix)" | $< > $@

$(object_dir)/%.o: %.c | $(object_dir)

$(object_dir)/opus%.o $(dep_dir)/opus%.d: CPPFLAGS += $(opus_cppflags)
$(object_dir)/gui%.o $(dep_dir)/gui%.d: CPPFLAGS += $(curses_cppflags)
$(object_dir)/spx%.o $(dep_dir)/spx%.d: CPPFLAGS += $(speex_cppflags)
$(object_dir)/flac%.o $(dep_dir)/flac%.d: CPPFLAGS += $(flac_cppflags)

$(object_dir)/mp3_afh.o $(dep_dir)/mp3_afh.d: CPPFLAGS += $(id3tag_cppflags)
$(object_dir)/crypt.o $(dep_dir)/crypt.d: CPPFLAGS += $(openssl_cppflags)
$(object_dir)/gcrypt.o $(dep_dir)/gcrypt.d: CPPFLAGS += $(gcrypt_cppflags)
$(object_dir)/ao_write.o $(dep_dir)/ao_write.d: CPPFLAGS += $(ao_cppflags)

$(object_dir)/interactive.o $(dep_dir)/interactive.d \
: CPPFLAGS += $(readline_cppflags)

$(object_dir)/resample_filter.o $(dep_dir)/resample_filter.d \
: CPPFLAGS += $(samplerate_cppflags)

$(object_dir)/mp3dec_filter.o $(dep_dir)/mp3dec_filter.d \
: CPPFLAGS += $(mad_cppflags)

$(object_dir)/aacdec_filter.o $(dep_dir)/aacdec_filter.d \
$(object_dir)/aac_common.o $(dep_dir)/aac_common.d \
$(object_dir)/aac_afh.o $(dep_dir)/aac_afh.d \
: CPPFLAGS += $(faad_cppflags)

$(object_dir)/ogg_afh.o $(dep_dir)/ogg_afh.d \
$(object_dir)/oggdec_filter.o $(dep_dir)/oggdec_filter.d \
: CPPFLAGS += $(vorbis_cppflags)

$(object_dir)/spx_common.o $(dep_dir)/spx_common.d \
$(object_dir)/spxdec_filter.o $(dep_dir)/spxdec_filter.d \
$(object_dir)/spx_afh.o $(dep_dir)/spx_afh.d \
$(object_dir)/oggdec_filter.o $(dep_dir)/oggdec_filter.d \
$(object_dir)/ogg_afh.o $(dep_dir)/ogg_afh.d \
$(object_dir)/ogg_afh_common.o $(dep_dir)/ogg_afh_common.d \
$(object_dir)/opus%.o $(dep_dir)/opus%.d \
: CPPFLAGS += $(ogg_cppflags)

$(object_dir)/afs.o $(dep_dir)/afs.d \
$(object_dir)/aft.o $(dep_dir)/aft.d \
$(object_dir)/attribute.o $(dep_dir)/attribute.d \
$(object_dir)/blob.o $(dep_dir)/blob.d  \
$(object_dir)/mood.o $(dep_dir)/mood.d \
$(object_dir)/playlist.o $(dep_dir)/playlist.d \
$(object_dir)/score.o $(dep_dir)/score.d \
$(object_dir)/server.o $(dep_dir)/server.d \
$(object_dir)/vss.o $(dep_dir)/vss.d \
$(object_dir)/command.o $(dep_dir)/command.d \
$(object_dir)/http_send.o $(dep_dir)/http_send.d \
$(object_dir)/dccp_send.o $(dep_dir)/dccp_send.d \
$(object_dir)/udp_send.o $(dep_dir)/udp_send.d \
$(object_dir)/send_common.o $(dep_dir)/send_common.d \
$(object_dir)/mm.o $(dep_dir)/mm.d \
: CPPFLAGS += $(osl_cppflags)

$(object_dir)/%.cmdline.o: CFLAGS += -Wno-unused-function
$(object_dir)/compress_filter.o: CFLAGS += -O3

$(object_dir)/%.o: %.c | $(object_dir)
	@[ -z "$(Q)" ] || echo 'CC $<'
	$(Q) $(CC) -c -o $@ $(CPPFLAGS) $(STRICT_CFLAGS) $<

$(object_dir)/%.cmdline.o: $(cmdline_dir)/%.cmdline.c $(cmdline_dir)/%.cmdline.h | $(object_dir)
	@[ -z "$(Q)" ] || echo 'CC $<'
	$(Q) $(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $<

# The compiler outputs dependencies either as foo.h or as some_directory/foo.h,
# depending on whether the latter file exists. Since make needs the directory
# part we prefix the dependency as appropriate.
$(dep_dir)/%.d: %.c error2.h | $(dep_dir)
	@[ -z "$(Q)" ] || echo 'DEP $<'
	$(Q) $(CC) $(CPPFLAGS) -MM -MG -MP -MT $@ -MT $(object_dir)/$(*F).o $< \
		| sed -e "s@ \([a-zA-Z0-9_]\{1,\}\.cmdline.h\)@ $(cmdline_dir)/\1@g" \
		-e "s@ \([a-zA-Z0-9_]\{1,\}\.command_list.h\)@ $(cmdlist_dir)/\1@g" \
		-e "s@ \([a-zA-Z0-9_]\{1,\}\.completion.h\)@ $(cmdlist_dir)/\1@g" > $@

para_recv para_afh para_play para_server: LDFLAGS += $(id3tag_ldflags)
para_write para_play para_audiod: LDFLAGS += $(ao_ldflags) $(core_audio_ldflags)
para_client para_audioc para_play : LDFLAGS += $(readline_ldflags)
para_server: LDFLAGS += $(osl_ldflags)
para_gui: LDFLAGS += $(curses_ldflags)
para_server \
para_client \
para_audiod \
:LDFLAGS += \
	$(openssl_ldflags) \
	$(gcrypt_ldflags)

para_audiod \
para_filter \
para_play \
: LDFLAGS += \
	$(mad_ldflags) \
	$(samplerate_ldflags) \
	-lm

para_write \
para_play \
para_audiod \
para_fade \
: LDFLAGS += \
	$(oss_ldflags) \
	$(alsa_ldflags)

para_server \
para_filter \
para_audiod \
para_play \
para_afh \
para_recv \
: LDFLAGS += \
	$(ogg_ldflags) \
	$(vorbis_ldflags) \
	$(speex_ldflags) \
	$(opus_ldflags) \
	$(faad_ldflags) \
	$(flac_ldflags)

para_server \
para_client \
para_audioc \
para_audiod \
para_recv \
: LDFLAGS += \
	$(socket_ldflags) $(nsl_ldflags)

$(foreach exe,$(executables),$(eval para_$(exe): $$($(exe)_objs)))
$(prefixed_executables):
	@[ -z "$(Q)" ] || echo 'LD $@'
	$(Q) $(CC) $^ -o $@ $(LDFLAGS)

clean:
	@[ -z "$(Q)" ] || echo 'CLEAN'
	$(Q) rm -f para_*
	$(Q) rm -rf $(object_dir)

clean2: clean
	@[ -z "$(Q)" ] || echo 'CLEAN2'
	$(Q) rm -rf $(build_dir)
distclean: clean2 test-clean
	@[ -z "$(Q)" ] || echo 'DISTCLEAN'
	$(Q) rm -f Makefile autoscan.log config.status config.log error2.h
	$(Q) rm -f GPATH GRTAGS GSYMS GTAGS

maintainer-clean: distclean
	@[ -z "$(Q)" ] || echo 'MAINTAINER-CLEAN'
	$(Q) rm -f *.tar.bz2 config.h configure config.h.in
	$(Q) rm -rf web_sync

install: all man
	$(MKDIR_P) $(BINDIR) $(MANDIR)
	$(INSTALL) -s --strip-program $(STRIP) -m 755 \
		$(prefixed_executables) $(BINDIR)
	$(INSTALL) -m 644 $(man_pages) $(MANDIR)
	$(MKDIR_P) $(VARDIR) >/dev/null 2>&1 || true # not fatal, so don't complain

$(tarball):
	$(Q) rm -rf $(tarball) $(tarball_pfx)
	$(Q) git archive --format=tar --prefix=$(tarball_pfx)/ HEAD \
		| tar --delete $(tarball_delete) > $(tarball_pfx).tar
	$(Q) $(MKDIR_P) $(tarball_pfx)
	$(Q) ./GIT-VERSION-GEN > $(tarball_pfx)/VERSION
	$(Q) cp $(autocrap) $(tarball_pfx)
	$(Q) tar rf $(tarball_pfx).tar $(tarball_pfx)/*
	$(Q) bzip2 -9 $(tarball_pfx).tar
	$(Q) ls -l $(tarball)
	$(Q) ln -sf $(tarball) paraslash-git.tar.bz2
	$(Q) rm -rf $(tarball_pfx)