# 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 += -Rr
ifeq ("$(origin CC)", "default")
        CC := cc
endif

LOGLEVELS := LL_DEBUG,LL_INFO,LL_NOTICE,LL_WARNING,LL_ERROR,LL_CRIT,LL_EMERG
vardir := /var/paraslash
mandir := $(datarootdir)/man/man1
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)
COPYRIGHT_YEAR := 2018

ifeq ("$(origin O)", "command line")
	build_dir := $(O)
else
	build_dir := build
endif
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

# 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) $(mixer_objs) $(server_objs) \
	$(write_objs) $(afh_objs) $(play_objs))
deps := $(addprefix $(dep_dir)/, $(all_objs:.o=.d))
deps += $(addprefix $(dep_dir)/, mp.bison.d mp.flex.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))

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

autocrap := config.h.in configure
tarball_pfx := $(PACKAGE_TARNAME)-$(GIT_VERSION)
tarball_delete := $(addprefix $(tarball_pfx)/, web .gitignore)
tarball := $(tarball_pfx).tar.xz

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

man: $(man_pages)

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

$(object_dir) $(man_dir) $(dep_dir) $(m4depdir) $(lls_suite_dir) \
	$(yy_build_dir):
	$(Q) $(MKDIR_P) $@

CPPFLAGS += -DBINDIR='"$(bindir)"'
CPPFLAGS += -DCOPYRIGHT_YEAR='"$(COPYRIGHT_YEAR)"'
CPPFLAGS += -DBUILD_DATE='"$(build_date)"'
CPPFLAGS += -DLOGLEVELS='$(LOGLEVELS)'
CPPFLAGS += -DUNAME_RS='"$(uname_rs)"'
CPPFLAGS += -DCC_VERSION='"$(cc_version)"'
CPPFLAGS += -I/usr/local/include
CPPFLAGS += -I$(lls_suite_dir)
CPPFLAGS += -I$(yy_build_dir)
CPPFLAGS += $(lopsub_cppflags)

STRICT_CFLAGS += -fno-strict-aliasing
STRICT_CFLAGS += -g
STRICT_CFLAGS += -Os
STRICT_CFLAGS += -Wundef -W -Wuninitialized
STRICT_CFLAGS += -Wchar-subscripts
STRICT_CFLAGS += -Werror-implicit-function-declaration
STRICT_CFLAGS += -Wmissing-noreturn
STRICT_CFLAGS += -Wbad-function-cast
STRICT_CFLAGS += -Wredundant-decls
STRICT_CFLAGS += -Wno-sign-compare -Wno-unknown-pragmas
STRICT_CFLAGS += -Wdeclaration-after-statement
STRICT_CFLAGS += -Wformat -Wformat-security -Wmissing-format-attribute

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

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

STRICT_CFLAGS += $(call cc-option, -Wformat-signedness)
STRICT_CFLAGS += $(call cc-option, -Wdiscarded-qualifiers)

# 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

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 | $(man_dir)
	@[ -z "$(Q)" ] || echo 'LLSMAN $<'
	$(Q) cat $< $(all_commands) > $@
	$(Q) $(M4) -D COPYRIGHT_YEAR=$(COPYRIGHT_YEAR) $(lls_m4_dir)/copyright.m4 >> $@

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

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

$(object_dir)/mp3_afh.o: CPPFLAGS += $(id3tag_cppflags)
$(object_dir)/crypt.o: CPPFLAGS += $(openssl_cppflags)
$(object_dir)/gcrypt.o: CPPFLAGS += $(gcrypt_cppflags)
$(object_dir)/ao_write.o: CPPFLAGS += $(ao_cppflags)
$(object_dir)/alsa%.o: CPPFLAGS += $(alsa_cppflags)

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

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

$(object_dir)/oss_write.o \
: CPPFLAGS += $(oss_cppflags)

$(object_dir)/ao_write.o \
: CPPFLAGS += $(ao_cppflags) $(pthread_cppflags)

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

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

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

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

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

$(object_dir)/compress_filter.o: CFLAGS += -O3

$(object_dir)/%.o: %.c | $(object_dir) $(dep_dir) $(lsg_h) $(yy_h)
	@[ -z "$(Q)" ] || echo 'CC $<'
	$(Q) $(CC) -c -o $@ -MMD -MF $(dep_dir)/$(*F).d -MT $@ $(CPPFLAGS) \
		$(STRICT_CFLAGS) $(CFLAGS) $<

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) \
	$(samplerate_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)))
$(prefixed_executables):
	@[ -z "$(Q)" ] || echo 'LD $@'
	$(Q) $(CC) $^ -o $@ $(LDFLAGS)

mostlyclean:
	@[ -z "$(Q)" ] || echo 'MOSTLYCLEAN'
	$(Q) rm -f para_*
	$(Q) rm -rf $(object_dir)
clean: mostlyclean
	@[ -z "$(Q)" ] || echo 'CLEAN'
	$(Q) rm -rf $(build_dir)
distclean: clean
	@[ -z "$(Q)" ] || echo 'DISTCLEAN'
	$(Q) rm -f Makefile autoscan.log config.status config.log
	$(Q) rm -f config.h configure config.h.in
maintainer-clean: distclean
	@[ -z "$(Q)" ] || echo 'MAINTAINER-CLEAN'
	$(Q) rm -f *.tar.bz2 *.tar.xz
	$(Q) rm -f GPATH GRTAGS GSYMS GTAGS

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

$(tarball) dist 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) xz -9 $(tarball_pfx).tar
	$(Q) ls -l $(tarball)
	$(Q) ln -sf $(tarball) paraslash-git.tar.xz
	$(Q) rm -rf $(tarball_pfx)