# This file is part of OpenTTD.
# OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
# OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.

CC_HOST        = !!CC_HOST!!
CXX_HOST       = !!CXX_HOST!!
CC_BUILD       = !!CC_BUILD!!
CXX_BUILD      = !!CXX_BUILD!!
WINDRES        = !!WINDRES!!
STRIP          = !!STRIP!!
CFLAGS         = !!CFLAGS!!
CFLAGS_BUILD   = !!CFLAGS_BUILD!!
CXXFLAGS       = !!CXXFLAGS!!
CXXFLAGS_BUILD = !!CXXFLAGS_BUILD!!
LIBS           = !!LIBS!!
LDFLAGS        = !!LDFLAGS!!
LDFLAGS_BUILD  = !!LDFLAGS_BUILD!!
ROOT_DIR       = !!ROOT_DIR!!
BIN_DIR        = !!BIN_DIR!!
LANG_DIR       = !!LANG_DIR!!
SRC_OBJS_DIR   = !!SRC_OBJS_DIR!!
LANG_OBJS_DIR  = !!LANG_OBJS_DIR!!
SETTING_OBJS_DIR= !!SETTING_OBJS_DIR!!
SRC_DIR        = !!SRC_DIR!!
SCRIPT_SRC_DIR = !!SCRIPT_SRC_DIR!!
MEDIA_DIR      = !!MEDIA_DIR!!
TTD            = !!TTD!!
STRGEN         = !!STRGEN!!
DEPEND         = !!DEPEND!!
OS             = !!OS!!
STAGE          = !!STAGE!!
MAKEDEPEND     = !!MAKEDEPEND!!
CFLAGS_MAKEDEP = !!CFLAGS_MAKEDEP!!
SORT           = !!SORT!!
AWK            = !!AWK!!
CONFIG_CACHE_COMPILER = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_COMPILER!!
CONFIG_CACHE_LINKER   = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_LINKER!!
CONFIG_CACHE_SOURCE   = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_SOURCE!!
CONFIG_CACHE_VERSION  = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_VERSION!!

OBJS_C   := !!OBJS_C!!
OBJS_CPP := !!OBJS_CPP!!
OBJS_MM  := !!OBJS_MM!!
OBJS_RC  := !!OBJS_RC!!
OBJS     := $(OBJS_C) $(OBJS_CPP) $(OBJS_MM) $(OBJS_RC)
SRCS     := !!SRCS!!

# All C-files depend on those 3 files
FILE_DEP := $(CONFIG_CACHE_COMPILER)
# Create all dirs and subdirs
RES      := $(shell mkdir -p $(BIN_DIR) $(sort $(dir $(OBJS))))

CFLAGS += -I $(SRC_OBJS_DIR) -I $(LANG_OBJS_DIR) -I $(SETTING_OBJS_DIR)
CFLAGS_MAKEDEP += -I $(SRC_OBJS_DIR) -I $(LANG_OBJS_DIR) -I $(SETTING_OBJS_DIR)
ifdef SCRIPT_SRC_DIR
	CFLAGS_MAKEDEP += -I $(SCRIPT_SRC_DIR)
endif

# Check if we want to show what we are doing
ifdef VERBOSE
	Q =
	E = @true
else
	Q = @
	E = @echo
endif

# Our default target
all: $(BIN_DIR)/$(TTD)

# This are 2 rules that are pointing back to STRGEN stuff.
#  There is not really a need to have them here, but in case
#  some weirdo wants to run 'make' in the 'src' dir and expects
#  the languages to be recompiled, this catches that case and
#  takes care of it nicely.
$(LANG_OBJS_DIR)/$(STRGEN):
	$(MAKE) -C $(LANG_OBJS_DIR) $(STRGEN)

$(LANG_OBJS_DIR)/table/strings.h: $(LANG_DIR)/english.txt $(LANG_OBJS_DIR)/$(STRGEN)
	$(MAKE) -C $(LANG_OBJS_DIR) table/strings.h

# Always run version detection, so we always have an accurate modified
# flag
VERSIONS := $(shell AWK="$(AWK)" "$(ROOT_DIR)/findversion.sh")
MODIFIED := $(shell echo "$(VERSIONS)" | cut -f 3 -d'	')

# Use autodetected revisions
VERSION  := $(shell echo "$(VERSIONS)" | cut -f 1 -d'	')
ISODATE  := $(shell echo "$(VERSIONS)" | cut -f 2 -d'	')
GITHASH  := $(shell echo "$(VERSIONS)" | cut -f 4 -d'	')
ISTAG    := $(shell echo "$(VERSIONS)" | cut -f 5 -d'	')
ISSTABLETAG := $(shell echo "$(VERSIONS)" | cut -f 6 -d'	')

# Make sure we have something in VERSION and ISODATE
ifeq ($(VERSION),)
VERSION := norev000
endif
ifeq ($(ISODATE),)
ISODATE := 00000000
endif

# This helps to recompile if flags change
RES := $(shell if [ "`cat $(CONFIG_CACHE_COMPILER) 2>/dev/null`" != "$(CFLAGS) $(CXXFLAGS)" ]; then echo "$(CFLAGS) $(CXXFLAGS)" > $(CONFIG_CACHE_COMPILER); fi )
RES := $(shell if [ "`cat $(CONFIG_CACHE_LINKER) 2>/dev/null`" != "$(LDFLAGS) $(LIBS)" ]; then echo "$(LDFLAGS) $(LIBS)" > $(CONFIG_CACHE_LINKER); fi )

# If there is a change in the source-file-list, make sure we recheck the deps
RES := $(shell if [ "`cat $(CONFIG_CACHE_SOURCE) 2>/dev/null`" != "$(SRCS)" ]; then echo "$(SRCS)" > $(CONFIG_CACHE_SOURCE); fi )
# If there is a change in the revision, make sure we recompile rev.cpp
RES := $(shell if [ "`cat $(CONFIG_CACHE_VERSION) 2>/dev/null`" != "$(VERSION) $(MODIFIED)" ]; then echo "$(VERSION) $(MODIFIED)" > $(CONFIG_CACHE_VERSION); fi )

ifndef MAKEDEPEND
# The slow, but always correct, dep-check
DEP_MASK := %.d
DEPS     := $(OBJS:%.o=%.d)

# Only include the deps if we are compiling everything
ifeq ($(filter %.o clean mrproper, $(MAKECMDGOALS)),)
-include $(DEPS)
else
# In case we want to compile a single target, include the .d file for it
ifneq ($(filter %.o, $(MAKECMDGOALS)),)
SINGLE_DEP := $(filter %.o, $(MAKECMDGOALS))
-include $(SINGLE_DEP:%.o=%.d)
endif
endif

# Find the deps via GCC. Rarely wrong, but a bit slow

$(OBJS_C:%.o=%.d): %.d: $(SRC_DIR)/%.c $(FILE_DEP)
	$(E) '$(STAGE) DEP $(<:$(SRC_DIR)/%.c=%.c)'
	$(Q)$(CC_HOST) $(CFLAGS) -MM $< | sed 's@^$(@F:%.d=%.o):@$@ $(@:%.d=%.o):@' > $@

$(OBJS_CPP:%.o=%.d): %.d: $(SRC_DIR)/%.cpp $(FILE_DEP)
	$(E) '$(STAGE) DEP $(<:$(SRC_DIR)/%.cpp=%.cpp)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -MM $< | sed 's@^$(@F:%.d=%.o):@$@ $(@:%.d=%.o):@' > $@

$(OBJS_MM:%.o=%.d): %.d: $(SRC_DIR)/%.mm $(FILE_DEP)
	$(E) '$(STAGE) DEP $(<:$(SRC_DIR)/%.mm=%.mm)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -MM $< | sed 's@^$(@F:%.d=%.o):@$@ $(@:%.d=%.o):@' > $@

$(OBJS_RC:%.o=%.d): %.d: $(SRC_DIR)/%.rc $(FILE_DEP)
	$(E) '$(STAGE) DEP $(<:$(SRC_DIR)/%.rc=%.rc)'
	$(Q)touch $@

else
# The much faster, but can be wrong, dep-check
DEP_MASK :=
DEPS     := Makefile.dep

# Only include the deps if we are not cleaning
ifeq ($(filter depend clean mrproper, $(MAKECMDGOALS)),)
-include Makefile.dep
endif

ifeq ("$(SRC_OBJS_DIR)/$(DEPEND)","$(MAKEDEPEND)")
DEP := $(MAKEDEPEND)
$(SRC_OBJS_DIR)/$(DEPEND): $(SRC_DIR)/depend/depend.cpp
	$(E) '$(STAGE) Compiling and linking $(DEPEND)'
	$(Q)$(CXX_BUILD) $(CFLAGS_BUILD) $(CXXFLAGS_BUILD) $(LDFLAGS_BUILD) -o $@ $<
endif

# Macro for invoking a command on groups of 100 words at a time
# (analogous to xargs(1)).  The macro invokes itself recursively
# until the list of words is depleted.
#
# Usage: $(call xargs,COMMAND,LIST)
#
# COMMAND should be a shell command to which the words will be
# appended as arguments in groups of 100.
define xargs
$(1) $(wordlist 1,100,$(2))
$(if $(word 101,$(2)),$(call xargs,$(1),$(wordlist 101,$(words $(2)),$(2))))
endef

# Make sure that only 'make depend' ALWAYS triggers a recheck
ifeq ($(filter depend, $(MAKECMDGOALS)),)
Makefile.dep: $(FILE_DEP) $(SRCS:%=$(SRC_DIR)/%) $(CONFIG_CACHE_SOURCE) $(DEP)
else
Makefile.dep: $(FILE_DEP) $(SRCS:%=$(SRC_DIR)/%) $(DEP) FORCE
endif
	$(E) '$(STAGE) DEP CHECK (all files)'
	$(Q)rm -f Makefile.dep.tmp
	$(Q)touch Makefile.dep.tmp

# Calculate the deps via makedepend
	$(call xargs,$(Q)$(MAKEDEPEND) -f$(SRC_OBJS_DIR)/Makefile.dep.tmp -o.o -Y -v -a -- $(CFLAGS_MAKEDEP) -- 2>/dev/null,$(SRCS:%=$(SRC_DIR)/%))

# Remove all comments and includes that don't start with $(SRC_DIR)
# Remove $(SRC_DIR) from object-file-name
	@$(AWK) '                           \
	/^# DO NOT/ { print $$0 ; next}     \
	/^#/ {next}                         \
	/: / {                               \
		left = NF - 1;                    \
		for (n = 2; n <= NF; n++) {       \
			if (match($$n, "^$(ROOT_DIR)") == 0) { \
				$$n = "";                     \
				left--;                       \
			}                               \
		}                                 \
		gsub("$(SRC_DIR)/", "", $$1);     \
		if (left > 0) {                   \
			print $$0;                      \
			$$1 = "Makefile.dep:";          \
			print $$0;                      \
		}                                 \
		next                              \
	}                                   \
	{                                   \
		print $$0                         \
	}                                   \
	' < Makefile.dep.tmp | sed 's@  *@ @g;s@ $$@@' | LC_ALL=C $(SORT) > Makefile.dep

	$(Q)rm -f Makefile.dep.tmp Makefile.dep.tmp.bak

endif

# Avoid problems with deps if a .h/.hpp/.hpp.sq file is deleted without the deps
#  being updated. Now the Makefile continues, the deps are recreated
#  and all will be fine.
%.h %.hpp %.hpp.sq:
	@true


# Compile all the files according to the targets

$(OBJS_C): %.o: $(SRC_DIR)/%.c $(DEP_MASK) $(FILE_DEP)
	$(E) '$(STAGE) Compiling $(<:$(SRC_DIR)/%.c=%.c)'
	$(Q)$(CC_HOST) $(CFLAGS) -c -o $@ $<

$(filter-out %sse2.o, $(filter-out %ssse3.o, $(filter-out %sse4.o, $(OBJS_CPP)))): %.o: $(SRC_DIR)/%.cpp $(DEP_MASK) $(FILE_DEP)
	$(E) '$(STAGE) Compiling $(<:$(SRC_DIR)/%.cpp=%.cpp)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -c -o $@ $<

$(filter %sse2.o, $(OBJS_CPP)): %.o: $(SRC_DIR)/%.cpp $(DEP_MASK) $(FILE_DEP)
	$(E) '$(STAGE) Compiling $(<:$(SRC_DIR)/%.cpp=%.cpp)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -c -msse2 -o $@ $<

$(filter %ssse3.o, $(OBJS_CPP)): %.o: $(SRC_DIR)/%.cpp $(DEP_MASK) $(FILE_DEP)
	$(E) '$(STAGE) Compiling $(<:$(SRC_DIR)/%.cpp=%.cpp)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -c -mssse3 -o $@ $<

$(filter %sse4.o, $(OBJS_CPP)): %.o: $(SRC_DIR)/%.cpp $(DEP_MASK) $(FILE_DEP)
	$(E) '$(STAGE) Compiling $(<:$(SRC_DIR)/%.cpp=%.cpp)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -c -msse4.1 -o $@ $<

$(OBJS_MM): %.o: $(SRC_DIR)/%.mm $(DEP_MASK) $(FILE_DEP)
	$(E) '$(STAGE) Compiling $(<:$(SRC_DIR)/%.mm=%.mm)'
	$(Q)$(CXX_HOST) $(CFLAGS) $(CXXFLAGS) -c -o $@ $<

$(OBJS_RC): %.o: $(SRC_DIR)/%.rc $(FILE_DEP)
	$(E) '$(STAGE) Compiling resource $(<:$(SRC_DIR)/%.rc=%.rc)'
	$(Q)$(WINDRES) -o $@ $<

$(BIN_DIR)/$(TTD): $(TTD)
	$(Q)cp $(TTD) $(BIN_DIR)/$(TTD)
ifeq ($(OS), UNIX)
	$(Q)cp $(MEDIA_DIR)/openttd.32.bmp $(BIN_DIR)/baseset/
endif
ifeq ($(OS), OSX)
	$(Q)cp $(ROOT_DIR)/os/macosx/splash.png $(BIN_DIR)/baseset/
endif

$(TTD): $(OBJS) $(CONFIG_CACHE_LINKER)
	$(E) '$(STAGE) Linking $@'
	$(Q)+$(CXX_HOST) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
ifdef STRIP
	$(Q)$(STRIP) $@
endif

# Revision files

$(SRC_DIR)/rev.cpp: $(CONFIG_CACHE_VERSION) $(SRC_DIR)/rev.cpp.in
	$(Q)cat $(SRC_DIR)/rev.cpp.in      | sed "s@\!\!ISODATE\!\!@$(ISODATE)@g;s@!!VERSION!!@$(VERSION)@g;s@!!MODIFIED!!@$(MODIFIED)@g;s@!!DATE!!@`date +%d.%m.%y`@g;s@!!GITHASH!!@$(GITHASH)@g;s@!!ISTAG!!@$(ISTAG)@g;s@!!ISSTABLETAG!!@$(ISSTABLETAG)@g" > $(SRC_DIR)/rev.cpp

$(SRC_DIR)/os/windows/ottdres.rc: $(CONFIG_CACHE_VERSION) $(SRC_DIR)/os/windows/ottdres.rc.in
	$(Q)cat $(SRC_DIR)/os/windows/ottdres.rc.in | sed "s@\!\!ISODATE\!\!@$(ISODATE)@g;s@!!VERSION!!@$(VERSION)@g;s@!!DATE!!@`date +%d.%m.%y`@g;s@!!GITHASH!!@$(GITHASH)@g;s@!!ISTAG!!@$(ISTAG)@g;s@!!ISSTABLETAG!!@$(ISSTABLETAG)@g" > $(SRC_DIR)/os/windows/ottdres.rc

FORCE:

depend: $(DEPS)

clean:
	$(E) '$(STAGE) Cleaning up object files'
	$(Q)rm -f $(DEPS) $(OBJS) $(TTD) $(DEPEND) $(TTD:%=$(BIN_DIR)/%) $(BIN_DIR)/baseset/openttd.32.bmp $(CONFIG_CACHE_COMPILER) $(CONFIG_CACHE_LINKER) $(CONFIG_CACHE_SOURCE)

mrproper: clean
	$(Q)rm -f $(SRC_DIR)/rev.cpp $(SRC_DIR)/os/windows/ottdres.rc

%.o:
	@echo '$(STAGE) No such source-file: $(@:%.o=%).[c|cpp|mm|rc]'

.PHONY: all mrproper depend clean FORCE