# Implicit rules are implemented in make as suffix rules. The following rule
# empties the suffix list to disable the predefined implicit rules. This
# increases performance and avoids hard-to-debug behaviour.
.SUFFIXES:
MAKEFLAGS += -Rrj
ifeq ("$(origin CC)", "default")
        CC := cc
endif
.ONESHELL:
.SHELLFLAGS := -ec
.SECONDARY: # don't remove intermediate files

PACKAGE := paraslash
DEFINES = \
	$(call DEFINE,PACKAGE,$(PACKAGE)) \
	$(call DEFINE,SLOGAN,network audio streaming) \
	$(call DEFINE,AUTHOR,Andre Noll) \
	$(call DEFINE,EMAIL,maan@tuebingen.mpg.de) \
	$(call DEFINE,COPYRIGHT_YEAR,1997) \
	$(call DEFINE,PROJECT_WEBSITE,https://people.tuebingen.mpg.de/maan/$(PACKAGE)/) \
	$(call DEFINE,CLONE_URL,https://git.tuebingen.mpg.de/$(PACKAGE)) \
	$(call DEFINE,GITWEB_URL,https://git.tuebingen.mpg.de/$(PACKAGE).git) \
	$(call DEFINE,HOME_URL,https://people.tuebingen.mpg.de/maan/) \
	$(call DEFINE,LICENSE,GPL-2.0) \
	$(call DEFINE,LICENSE_URL,https://www.gnu.org/licenses/)
DEFINE = -D '$(1)=$(2)'
M4 += $(DEFINES)
DEFINE = $(1)='$(2)'
SHELL_DEFINES := $(DEFINES)

LOGLEVELS := LL_DEBUG,LL_INFO,LL_NOTICE,LL_WARNING,LL_ERROR,LL_CRIT,LL_EMERG
SEVERITIES := \"debug\",\"info\",\"notice\",\"warning\",\"error\",\"crit\",\"emerg\"
vardir := /var/paraslash
mandir := $(datarootdir)/man/man1
MKDIR_P := mkdir -p
RM := rm -f

ifeq ("$(origin O)", "command line")
	build_dir := $(O)
else
	build_dir := build
endif
version_dir := $(build_dir)/version-gen
object_dir := $(build_dir)/objects
dep_dir := $(build_dir)/deps
man_dir := $(build_dir)/man/man1
m4depdir := $(build_dir)/m4deps
lls_suite_dir := $(build_dir)/lls
lls_m4_dir := m4/lls
test_dir := t
yy_src_dir := yy
yy_build_dir := $(build_dir)/yy
GIT_VERSION := $(shell $(MKDIR_P) $(object_dir) $(dep_dir) $(man_dir) \
	$(m4depdir) $(lls_suite_dir) $(yy_build_dir) && \
	$(SHELL_DEFINES) ./version-gen.sh $(PACKAGE) $(version_dir)/version.c)

executables := recv filter audioc write afh
ifneq ($(CRYPTOLIB),)
	ifeq ($(HAVE_OSL),yes)
	executables += server
		server_objs := $(addsuffix .o, \
			server afh_common vss command net string \
			signal time daemon http_send \
			crypt_common ipc fd \
			afs aft mood mp score attribute blob \
			playlist sched udp_send color fec \
			wma_afh wma_common sideband lsu version \
		)
		ifeq ($(HAVE_ID3TAG),yes)
			server_objs += mp3_afh.o
		endif
		ifeq ($(CRYPTOLIB),openssl)
			server_objs += openssl.o
		else
			server_objs += gcrypt.o
		endif
		ifeq ($(NEED_OGG_OBJECTS),yes)
			server_objs += ogg_afh_common.o
		endif
		ifeq ($(NEED_VORBIS_OBJECTS),yes)
			server_objs += ogg_afh.o
		endif
		ifeq ($(NEED_SPEEX_OBJECTS),yes)
			server_objs += spx_afh.o spx_common.o
		endif
		ifeq ($(NEED_OPUS_OBJECTS),yes)
			server_objs += opus_afh.o opus_common.o
		endif
		ifeq ($(NEED_FLAC_OBJECTS),yes)
			server_objs += flac_afh.o
		endif
		ifeq ($(HAVE_FAAD),yes)
			server_objs += aac_afh.o mp4.o
		endif
	endif
endif
ifneq ($(CRYPTOLIB),)
	executables += client audiod
	client_objs := $(addsuffix .o, \
		client net string fd lsu sched stdin stdout time sideband client_common \
		buffer_tree crypt_common $(CRYPTOLIB) version \
	)
	ifeq ($(HAVE_READLINE),yes)
		client_objs += interactive.o
	endif
	audiod_objs := $(addsuffix .o, \
		audiod signal string daemon stat net crypt_common sideband \
		time grab_client filter_common wav_filter compress_filter amp_filter \
		http_recv recv_common fd sched write_common file_write \
		audiod_command fecdec_filter client_common udp_recv color fec \
		prebuffer_filter bitstream imdct wma_common wmadec_filter \
		buffer_tree sync_filter lsu $(CRYPTOLIB) version \
	)
	audiod_audio_formats := "wma"
	ifeq ($(NEED_VORBIS_OBJECTS),yes)
		audiod_objs += oggdec_filter.o
		audiod_audio_formats += ,"ogg"
	endif
	ifeq ($(NEED_SPEEX_OBJECTS),yes)
		audiod_objs += spxdec_filter.o spx_common.o
		audiod_audio_formats += ,"spx"
	endif
	ifeq ($(NEED_OPUS_OBJECTS),yes)
		audiod_objs += opusdec_filter.o opus_common.o
		audiod_audio_formats += ,"opus"
	endif
	ifeq ($(NEED_FLAC_OBJECTS),yes)
		audiod_objs += flacdec_filter.o
		audiod_audio_formats += ,"flac"
	endif
	ifeq ($(HAVE_FAAD),yes)
		audiod_objs += aacdec_filter.o
		audiod_audio_formats += ,"aac"
	endif
	ifeq ($(HAVE_MAD),yes)
		audiod_objs += mp3dec_filter.o
		audiod_audio_formats += ,"mp3"
	endif
	ifeq ($(HAVE_OSS),yes)
		audiod_objs += oss_write.o
	endif
	ifeq ($(HAVE_ALSA),yes)
		audiod_objs += alsa_write.o
	endif
	ifeq ($(NEED_AO_OBJECTS),yes)
		audiod_objs += ao_write.o
	endif
endif
ifneq ($(HAVE_OSS)-$(HAVE_ALSA),no-no)
	executables += mixer
	mixer_objs := $(addsuffix .o, mixer exec string fd time lsu version)
	ifeq ($(HAVE_OSS),yes)
		mixer_objs += oss_mix.o
	endif
	ifeq ($(HAVE_ALSA),yes)
		mixer_objs += alsa_mix.o
	endif
endif
ifeq ($(HAVE_CURSES),yes)
	executables += gui
	gui_objs := $(addsuffix .o, exec signal string stat ringbuffer fd \
		gui gui_theme lsu time sched version audioc_common net sideband)
endif
filter_objs := $(addsuffix .o, \
	filter_common wav_filter compress_filter filter string stdin stdout \
	sched fd amp_filter fecdec_filter fec lsu prebuffer_filter \
	time bitstream imdct wma_common wmadec_filter buffer_tree net \
	sync_filter version \
)
ifeq ($(NEED_VORBIS_OBJECTS),yes)
	filter_objs += oggdec_filter.o
endif
ifeq ($(NEED_SPEEX_OBJECTS),yes)
	filter_objs += spxdec_filter.o spx_common.o
endif
ifeq ($(NEED_OPUS_OBJECTS),yes)
	filter_objs += opusdec_filter.o opus_common.o
endif
ifeq ($(NEED_FLAC_OBJECTS),yes)
	filter_objs += flacdec_filter.o
endif
ifeq ($(HAVE_FAAD),yes)
	filter_objs += aacdec_filter.o
endif
ifeq ($(HAVE_MAD),yes)
	filter_objs += mp3dec_filter.o
endif

recv_objs := $(addsuffix .o, \
	http_recv recv_common recv time string net fd sched stdout \
	udp_recv buffer_tree afh_recv afh_common wma_afh wma_common version \
)
ifeq ($(HAVE_ID3TAG),yes)
	recv_objs += mp3_afh.o
endif
ifeq ($(NEED_OGG_OBJECTS),yes)
	recv_objs += ogg_afh_common.o
endif
ifeq ($(NEED_VORBIS_OBJECTS),yes)
	recv_objs += ogg_afh.o
endif
ifeq ($(NEED_SPEEX_OBJECTS),yes)
	recv_objs += spx_afh.o spx_common.o
endif
ifeq ($(NEED_OPUS_OBJECTS),yes)
	recv_objs += opus_afh.o opus_common.o
endif
ifeq ($(NEED_FLAC_OBJECTS),yes)
	recv_objs += flac_afh.o
endif
ifeq ($(HAVE_FAAD),yes)
	recv_objs += aac_afh.o mp4.o
endif

audio_format_handlers := wma
afh_objs := $(addsuffix .o, afh string fd afh_common time wma_afh wma_common \
	version)
ifeq ($(HAVE_ID3TAG),yes)
	afh_objs += mp3_afh.o
	audio_format_handlers += mp3
endif
ifeq ($(NEED_OGG_OBJECTS),yes)
	afh_objs += ogg_afh_common.o
endif
ifeq ($(NEED_VORBIS_OBJECTS),yes)
	afh_objs += ogg_afh.o
	audio_format_handlers += ogg
endif
ifeq ($(NEED_SPEEX_OBJECTS),yes)
	afh_objs += spx_common.o
	audio_format_handlers += spx
endif
ifeq ($(NEED_OPUS_OBJECTS),yes)
	afh_objs += opus_afh.o opus_common.o
	audio_format_handlers += opus
endif
ifeq ($(NEED_FLAC_OBJECTS),yes)
	afh_objs += flac_afh.o
	audio_format_handlers += flac
endif
ifeq ($(HAVE_FAAD),yes)
	afh_objs += aac_afh.o mp4.o
	audio_format_handlers += aac
endif

ifeq ($(HAVE_READLINE),yes)
	executables += play
	play_objs := $(addsuffix .o, \
		play fd sched buffer_tree time string net afh_recv afh_common \
		wma_afh wma_common recv_common udp_recv http_recv \
		filter_common fec bitstream imdct wav_filter compress_filter \
		amp_filter prebuffer_filter fecdec_filter wmadec_filter write_common \
		file_write sync_filter lsu interactive version \
	)
	ifeq ($(HAVE_ID3TAG),yes)
		play_objs += mp3_afh.o
	endif
	ifeq ($(NEED_OGG_OBJECTS),yes)
		play_objs += ogg_afh_common.o
	endif
	ifeq ($(NEED_VORBIS_OBJECTS),yes)
		play_objs += oggdec_filter.o ogg_afh.o
	endif
	ifeq ($(NEED_SPEEX_OBJECTS),yes)
		play_objs += spxdec_filter.o spx_afh.o spx_common.o
	endif
	ifeq ($(NEED_OPUS_OBJECTS),yes)
		play_objs += opusdec_filter.o opus_afh.o opus_common.o
	endif
	ifeq ($(NEED_FLAC_OBJECTS),yes)
		play_objs += flacdec_filter.o flac_afh.o
	endif
	ifeq ($(HAVE_FAAD),yes)
		play_objs += aac_afh.o aacdec_filter.o mp4.o
	endif
	ifeq ($(HAVE_MAD),yes)
		play_objs += mp3dec_filter.o
	endif
	ifeq ($(HAVE_OSS),yes)
		play_objs += oss_write.o
	endif
	ifeq ($(HAVE_ALSA),yes)
		play_objs += alsa_write.o
	endif
	ifeq ($(NEED_AO_OBJECTS),yes)
		play_objs += ao_write.o
	endif
endif

write_objs := $(addsuffix .o, write write_common file_write time fd \
	string sched stdin buffer_tree version)
ifeq ($(NEED_AO_OBJECTS),yes)
	write_objs += ao_write.o
endif
ifeq ($(HAVE_OSS),yes)
	write_objs += oss_write.o
endif
ifeq ($(HAVE_ALSA),yes)
	write_objs += alsa_write.o
endif

audioc_objs := $(addsuffix .o, audioc string lsu net fd time version sideband \
	audioc_common)
ifeq ($(HAVE_READLINE),yes)
	audioc_objs += buffer_tree.o interactive.o sched.o
endif

# sort removes duplicate words, which is all we need here
dep_objs := $(sort $(recv_objs) $(filter_objs) $(client_objs) $(gui_objs) \
	$(audiod_objs) $(audioc_objs) $(mixer_objs) $(server_objs) \
	$(write_objs) $(afh_objs) $(play_objs) mp.bison mp.flex)
deps := $(addprefix $(dep_dir)/, $(dep_objs:.o=.d))

afh_objs += afh.lsg.o
audioc_objs += audioc.lsg.o
audiod_objs += $(addsuffix _cmd.lsg.o, recv filter audiod write) \
	client.lsg.o audiod.lsg.o
client_objs += client.lsg.o
mixer_objs += mixer.lsg.o
filter_objs += filter_cmd.lsg.o filter.lsg.o
gui_objs += gui.lsg.o
play_objs += $(addsuffix _cmd.lsg.o, recv filter play write) play.lsg.o
recv_objs += recv_cmd.lsg.o recv.lsg.o
server_objs += server_cmd.lsg.o server.lsg.o
write_objs += write_cmd.lsg.o write.lsg.o

cmd_suites := $(addsuffix _cmd, audiod server play recv filter write)
suites := $(addprefix $(lls_suite_dir)/, $(cmd_suites) $(executables))
m4_lls_deps := $(addsuffix .m4d, $(suites))
lsg_h := $(addsuffix .lsg.h, $(suites))

# flex/bison objects and headers are only needed if para_server is built
ifeq ("$(findstring server, $(executables))", "server")
	server_objs += mp.flex.o mp.bison.o
	yy_h := $(yy_build_dir)/mp.bison.h
endif

# 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))
mixer_objs := $(addprefix $(object_dir)/, $(mixer_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))

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

all: $(prefixed_executables) $(man_pages)
.PHONY: all mostlyclean clean distclean maintainer-clean install \
	install-strip man dist

man: $(man_pages)

include $(lls_m4_dir)/makefile
include $(test_dir)/makefile
include $(yy_src_dir)/makefile
ifeq ($(findstring clean, $(MAKECMDGOALS)),)
-include $(deps)
-include $(m4_lls_deps)
endif

XCPPFLAGS := -DLOGLEVELS='$(LOGLEVELS)'
XCPPFLAGS += -DSEVERITIES=$(SEVERITIES)
XCPPFLAGS += -I$(lls_suite_dir)
XCPPFLAGS += -I$(yy_build_dir)
XCPPFLAGS += $(lopsub_cppflags)
XCPPFLAGS += -Wunused-macros
XCPPFLAGS += $(shell \
	printf '__attribute__ ((nonstring)) char buf[1] = "x";' \
	| $(CC) -Werror -c -x c - -o /dev/null > /dev/null 2>&1 \
	&& printf -- '-D__nonstring="__attribute__ ((nonstring))"' \
	|| printf -- '-D__nonstring=' \
)

XCFLAGS := -fno-strict-aliasing
XCFLAGS += -ftrapv
XCFLAGS += -g
XCFLAGS += -Os
XCFLAGS += -Wundef -Wextra
XCFLAGS += -Wchar-subscripts
XCFLAGS += -Werror-implicit-function-declaration
XCFLAGS += -Wmissing-noreturn
XCFLAGS += -Wbad-function-cast
XCFLAGS += -Wredundant-decls
XCFLAGS += -Wno-sign-compare -Wno-unknown-pragmas
XCFLAGS += -Wdeclaration-after-statement
XCFLAGS += -Wformat -Wformat-security -Wmissing-format-attribute
XCFLAGS += -fdata-sections -ffunction-sections
XCFLAGS += -Wstrict-prototypes
XCFLAGS += -Wshadow
XCFLAGS += -Wunused -Wall

LDFLAGS += -Wl,--gc-sections

ifeq ($(ENABLE_UBSAN), yes)
	XCFLAGS += -fsanitize=undefined
	LDFLAGS += -lubsan
endif

cc-option = $(shell \
	$(CC) $(1) -Werror -c -x c /dev/null -o /dev/null > /dev/null 2>&1 \
	&& echo "$(1)" \
)

XCFLAGS += $(call cc-option, -Wformat-signedness)
XCFLAGS += $(call cc-option, -Wdiscarded-qualifiers)
XCFLAGS += $(call cc-option, -Wsuggest-attribute=malloc)

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

audiod_commands := $(addprefix $(lls_suite_dir)/, \
	$(addsuffix _cmd.lsg.man, audiod recv filter write))
filter_commands := $(lls_suite_dir)/filter_cmd.lsg.man
play_commands := $(lls_suite_dir)/play_cmd.lsg.man
recv_commands := $(lls_suite_dir)/recv_cmd.lsg.man
server_commands := $(lls_suite_dir)/server_cmd.lsg.man
write_commands := $(lls_suite_dir)/write_cmd.lsg.man

$(man_dir)/para_audiod.1: $(audiod_commands)
$(man_dir)/para_filter.1: $(filter_commands)
$(man_dir)/para_play.1: $(play_commands)
$(man_dir)/para_recv.1: $(recv_commands)
$(man_dir)/para_server.1: $(server_commands)
$(man_dir)/para_write.1: $(write_commands)

$(man_dir)/para_audiod.1: all_commands := $(audiod_commands)
$(man_dir)/para_filter.1: all_commands := $(filter_commands)
$(man_dir)/para_play.1: all_commands := $(play_commands)
$(man_dir)/para_recv.1: all_commands := $(recv_commands)
$(man_dir)/para_server.1: all_commands := $(server_commands)
$(man_dir)/para_write.1: all_commands := $(write_commands)

$(man_dir)/para_%.1: $(lls_suite_dir)/%.lsg.man \
		$(lls_m4_dir)/copyright.m4
	$(call SAY, LLSMAN $<)
	cat $< $(all_commands) > $@
	$(M4) $(lls_m4_dir)/copyright.m4 >> $@

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

OD = $(addsuffix .d, $(addprefix $(dep_dir)/, $(1))) \
	$(addsuffix .o, $(addprefix $(object_dir)/, $(1)))

$(call OD, audiod): \
	XCPPFLAGS += -DAUDIOD_AUDIO_FORMAT_ARRAY='$(audiod_audio_formats)'
$(call OD, afh command): \
	XCPPFLAGS += -DAUDIO_FORMAT_HANDLERS='"$(audio_format_handlers)"'
$(call OD, opus%): XCPPFLAGS += $(opus_cppflags)
$(call OD, gui gui%): XCPPFLAGS += $(curses_cppflags)
$(call OD, spx%): XCPPFLAGS += $(speex_cppflags)
$(call OD, flac%): XCPPFLAGS += $(flac_cppflags)
$(call OD, mp3_afh): XCPPFLAGS += $(id3tag_cppflags)
$(call OD, openssl): XCPPFLAGS += $(openssl_cppflags)
$(call OD, gcrypt): XCPPFLAGS += $(gcrypt_cppflags)
$(call OD, ao_write): XCPPFLAGS += $(ao_cppflags)
$(call OD, alsa%): XCPPFLAGS += $(alsa_cppflags)
$(call OD, interactive): XCPPFLAGS += $(readline_cppflags)
$(call OD, oss_write): XCPPFLAGS += $(oss_cppflags)
$(call OD, ao_write): XCPPFLAGS += $(ao_cppflags) $(pthread_cppflags)
$(call OD, mp3dec_filter): XCPPFLAGS += $(mad_cppflags)
$(call OD, aacdec_filter aac_afh): XCPPFLAGS += $(faad_cppflags)
$(call OD, ogg_afh oggdec_filter): XCPPFLAGS += $(vorbis_cppflags)
$(call OD, spx_common spxdec_filter spx_afh oggdec_filter ogg_afh \
	ogg_afh_common opus%): XCPPFLAGS += $(ogg_cppflags)
$(call OD, afs aft attribute blob mood playlist score server vss command \
	http_send udp_send mm.o): \
	XCPPFLAGS += $(osl_cppflags)

$(call OD, compress_filter): XCFLAGS += -O3

define CC_CMD
	$(call SAY, CC $<)
	$(CC) -c -o $(object_dir)/$(*F).o -MMD -MP -MF \
		$(dep_dir)/$(*F).d -MT $(object_dir)/$(*F).o \
		$(XCPPFLAGS) $(CPPFLAGS) $(XCFLAGS) $(CFLAGS) $<
endef
CC_PREREQUISITES := %.c | $(lsg_h) $(yy_h)
# There should be a # better way to write these.
$(object_dir)/%.o: $(version_dir)/%.c
	$(CC_CMD)
$(object_dir)/%.o: $(CC_PREREQUISITES)
	$(CC_CMD)
$(dep_dir)/%.d: $(CC_PREREQUISITES)
	$(CC_CMD)

para_recv para_afh para_play para_server: LDFLAGS += $(id3tag_ldflags)
para_write para_play para_audiod: LDFLAGS += $(ao_ldflags) $(pthread_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 += \
	$(crypto_ldflags)

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

para_mixer: LDFLAGS += -lm

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

para_afh \
para_audioc \
para_audiod \
para_client \
para_mixer \
para_filter \
para_gui \
para_play \
para_recv \
para_server \
para_write \
: LDFLAGS += $(lopsub_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_afh para_recv para_server para_play: LDFLAGS += $(iconv_ldflags)

$(foreach exe,$(executables),$(eval para_$(exe): $$($(exe)_objs)))
$(prefixed_executables):
	$(call SAY, LD $@)
	$(CC) $^ -o $@ $(LDFLAGS)

mostlyclean:
	$(RM) para_*
clean: mostlyclean
	$(RM) -r $(object_dir)
distclean: clean test-clean
	$(RM) -r $(build_dir)
maintainer-clean: distclean
	$(RM) Makefile config.status config.log config.h configure config.h.in

INSTALL ?= install
INSTALL_PROGRAM ?= $(INSTALL)
INSTALL_DATA ?= $(INSTALL) -m 644
ifneq ($(findstring strip, $(MAKECMDGOALS)),)
	strip_option := -s
endif

install install-strip: all man
	$(MKDIR_P) $(DESTDIR)$(bindir) $(DESTDIR)$(mandir)
	$(INSTALL) $(strip_option) $(prefixed_executables) $(DESTDIR)$(bindir)
	$(INSTALL_DATA) $(man_pages) $(DESTDIR)$(mandir)
	$(MKDIR_P) $(DESTDIR)$(vardir) >/dev/null 2>&1 || true # not fatal, so don't complain