##	BeOS and Haiku Generic Makefile Engine v2.2.0
##	Does all the hard work for the Generic Makefile
##	which simply defines the project parameters

##	Supports Generic Makefile v2.0, 2.01, 2.1, 2.2, 2.3

#	determine wheather running on x86 or ppc
MACHINE=$(shell uname -m)
ifeq ($(MACHINE), BePC)
	CPU = x86
else
	CPU = $(MACHINE)
endif

#	create some default settings
ifeq ($(NAME), )
	NAME = NameThisApp
endif

ifeq ($(TYPE), )
	TYPE = APP
endif

ifeq ($(DRIVER_PATH), )
	DRIVER_PATH = misc
endif

#	specify the mimeset tool
	MIMESET		:= mimeset

#	specify the tools for adding and removing resources
	XRES		:= xres

#	specify the tools for compiling resource definition files
	RESCOMP		:= rc

#	set the compiler and compiler flags
	CC			:=	gcc
	C++			:=	g++

#	SETTING: set the CFLAGS for each binary type
	ifeq ($(TYPE), DRIVER)
		CFLAGS	+= -D_KERNEL_MODE=1 -no-fpic
	else
		CFLAGS +=
	endif

#	SETTING: set the proper optimization level
	ifeq ($(OPTIMIZE), FULL)
		OPTIMIZER	= -O3
	else
	ifeq ($(OPTIMIZE), SOME)
		OPTIMIZER	= -O1
	else
	ifeq ($(OPTIMIZE), NONE)
		OPTIMIZER	= -O0
	else
#		OPTIMIZE not set so set to full
		OPTIMIZER	= -O3
	endif
	endif
	endif

#	SETTING: set proper debugger flags
	ifeq ($(DEBUGGER), TRUE)
		DEBUG += -g
		OPTIMIZER = -O0
	endif

	CFLAGS += $(OPTIMIZER) $(DEBUG)

#	SETTING: set warning level
	ifeq ($(WARNINGS), ALL)
		CFLAGS += -Wall -Wno-multichar -Wno-ctor-dtor-privacy
	else
	ifeq ($(WARNINGS), NONE)
		CFLAGS += -w
	endif
	endif

#	set the linker and linker flags
	LD			:= gcc
	LDFLAGS		+= $(DEBUG)

#	SETTING: set linker flags for each binary type
	ifeq ($(TYPE), APP)
		LDFLAGS += -Xlinker -soname=_APP_
	else
	ifeq ($(TYPE), SHARED)
		LDFLAGS += -nostart -Xlinker -soname=$(NAME)
	else
	ifeq ($(TYPE), DRIVER)
		LDFLAGS += -nostdlib /boot/develop/lib/x86/_KERNEL_ \
					/boot/develop/lib/x86/haiku_version_glue.o
	endif
	endif
	endif

#	guess compiler version
	CC_VER = $(word 1, $(subst -, , $(subst ., , $(shell $(CC) -dumpversion))))

#	set the directory where object files and binaries will be created
	OBJ_DIR		:= objects.$(CPU)-$(CC)$(CC_VER)-$(if $(DEBUGGER),debug,release)

# 	specify the directory the binary should be created in by default
ifeq ($(TARGET_DIR), )
	TARGET_DIR	:= $(OBJ_DIR)
endif

# NOTE: make doesn't find the target if its name is enclosed in
#       quotation marks
	TARGET		:= $(TARGET_DIR)/$(NAME)

# psuedo-function for converting a list of source files in SRCS variable
# to a corresponding list of object files in $(OBJ_DIR)/xxx.o
# The "function" strips off the src file suffix (.ccp or .c or whatever)
# and then strips of the directory name, leaving just the root file name.
# It then appends the .o suffix and prepends the $(OBJ_DIR)/ path
define SRCS_LIST_TO_OBJS
	$(addprefix $(OBJ_DIR)/, $(addsuffix .o, $(foreach file, $(SRCS), \
	$(basename $(notdir $(file))))))
endef

define SRCS_LIST_TO_DEPENDS
	$(addprefix $(OBJ_DIR)/, $(addsuffix .d, $(foreach file, $(SRCS), \
	$(basename $(notdir $(file))))))
endef

OBJS = $(SRCS_LIST_TO_OBJS)
DEPENDS = $(SRCS_LIST_TO_DEPENDS)

# create a unique list of paths to our sourcefiles
SRC_PATHS += $(sort $(foreach file, $(SRCS), $(dir $(file))))

# add source paths to VPATH if not already present
VPATH :=
VPATH += $(addprefix :, $(subst  ,:, $(filter-out $($(subst, :, ,$(VPATH))), $(SRC_PATHS))))

#	SETTING: build the local and system include paths
ifeq ($(CPU), x86)
	LOC_INCLUDES = $(foreach path, $(SRC_PATHS) $(LOCAL_INCLUDE_PATHS), $(addprefix -I, $(path)))
 ifeq ($(CC_VER), 2)
	INCLUDES = $(LOC_INCLUDES)
	INCLUDES += -I-
	INCLUDES += $(foreach path, $(SYSTEM_INCLUDE_PATHS), $(addprefix -I, $(path)))
 else
	INCLUDES = -iquote./
	INCLUDES += $(foreach path, $(SRC_PATHS) $(LOCAL_INCLUDE_PATHS), $(addprefix -iquote, $(path)))
	INCLUDES += $(foreach path, $(SYSTEM_INCLUDE_PATHS), $(addprefix -isystem, $(path)))
 endif
else
ifeq ($(CPU), ppc)
	LOC_INCLUDES = $(foreach path, $(SRC_PATHS) $(LOCAL_INCLUDE_PATHS), $(addprefix -I, $(path)))
	SYS_INCLUDES += -i-
	SYS_INCLUDES += $(foreach path, $(SYSTEM_INCLUDE_PATHS), $(addprefix -i , $(path)))
	
	INCLUDES = $(LOC_INCLUDES) $(SYS_INCLUDES)
endif
endif


# SETTING: add the -L prefix to all library paths to search
LINK_PATHS = $(foreach path, $(SRC_PATHS) $(LIBPATHS), \
	$(addprefix -L, $(path)))

#	SETTING: specify the additional libraries to link against
#	if the libraries have a .so or .a prefix, or if they are _APP_ or _KERNEL_
#	simply add them to the list
LINK_LIBS += $(filter %.so %.a _APP_ _KERNEL_, $(LIBS))
#	if the libraries do not have suffixes and are not _APP_ or _KERNEL_
#	prepend -l to each name: be becomes -lbe
LINK_LIBS += $(foreach lib, $(filter-out %.so %.a _APP_ _KERNEL_, $(LIBS)), $(addprefix -l, $(lib)))

# add to the linker flags
LDFLAGS += $(LINK_PATHS)  $(LINK_LIBS)

#	SETTING: add the defines to the compiler flags
CFLAGS += $(foreach define, $(DEFINES), $(addprefix -D, $(define)))

#	SETTING: add the additional compiler flags
CFLAGS += $(COMPILER_FLAGS)

#	SETTING: add the additional linker flags
LDFLAGS += $(LINKER_FLAGS)

#	SETTING: use the archive tools if building a static library
#	otherwise use the linker
ifeq ($(TYPE), STATIC)
	BUILD_LINE = ar -cru "$(TARGET)" $(OBJS)
else
	BUILD_LINE = $(LD) -o "$@" $(OBJS) $(LDFLAGS)
endif

# pseudo-function for converting a list of resource definition files in RDEFS
# variable to a corresponding list of object files in $(OBJ_DIR)/xxx.rsrc
# The "function" strips off the rdef file suffix (.rdef) and then strips
# of the directory name, leaving just the root file name.
# It then appends the .rsrc suffix and prepends the $(OBJ_DIR)/ path
define RDEFS_LIST_TO_RSRCS
	$(addprefix $(OBJ_DIR)/, $(addsuffix .rsrc, $(foreach file, $(RDEFS), \
	$(basename $(notdir $(file))))))
endef

#	create the resource definitions instruction in case RDEFS is not empty
	ifeq ($(RDEFS), )
		RSRCS +=
	else
		RSRCS += $(RDEFS_LIST_TO_RSRCS)
	endif

#	create the resource instruction
	ifeq ($(RSRCS), )
		DO_RSRCS :=
	else
		DO_RSRCS := $(XRES) -o $(TARGET) $(RSRCS)
	endif


#	define the actual work to be done
default: $(TARGET)

$(TARGET):	$(OBJ_DIR) $(OBJS) $(RSRCS)
		$(BUILD_LINE)
		$(DO_RSRCS)
		$(MIMESET) -f "$@"


#	rule to create the object file directory if needed
$(OBJ_DIR)::
	@[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1

# rules to make the dependency files
$(OBJ_DIR)/%.d : %.c
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .c:$(OBJ_DIR)/%n.o -m -f "$@" $<
$(OBJ_DIR)/%.d : %.cpp
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .cpp:$(OBJ_DIR)/%n.o -m -f "$@" $<
$(OBJ_DIR)/%.d : %.cp
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .cp:$(OBJ_DIR)/%n.o -m -f "$@" $<
$(OBJ_DIR)/%.d : %.cc
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .cc:$(OBJ_DIR)/%n.o -m -f "$@" $<
$(OBJ_DIR)/%.d : %.C
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .C:$(OBJ_DIR)/%n.o -m -f "$@" $<
$(OBJ_DIR)/%.d : %.CC
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .CC:$(OBJ_DIR)/%n.o -m -f "$@" $<
$(OBJ_DIR)/%.d : %.CPP
	[ -d $(OBJ_DIR) ] || mkdir $(OBJ_DIR) > /dev/null 2>&1; \
	mkdepend $(LOC_INCLUDES) -p .CPP:$(OBJ_DIR)/%n.o -m -f "$@" $<

-include $(DEPENDS)

# rules to make the object files
$(OBJ_DIR)/%.o : %.c
	$(CC) -c $< $(INCLUDES) $(CFLAGS) -o "$@"
$(OBJ_DIR)/%.o : %.cpp
	$(C++) -c $< $(INCLUDES) $(CFLAGS) -o "$@"
$(OBJ_DIR)/%.o : %.cp
	$(CC) -c $< $(INCLUDES) $(CFLAGS) -o "$@"
$(OBJ_DIR)/%.o : %.cc
	$(C++) -c $< $(INCLUDES) $(CFLAGS) -o "$@"
$(OBJ_DIR)/%.o : %.C
	$(CC) -c $< $(INCLUDES) $(CFLAGS) -o "$@"
$(OBJ_DIR)/%.o : %.CC
	$(C++) -c $< $(INCLUDES) $(CFLAGS) -o "$@"
$(OBJ_DIR)/%.o : %.CPP
	$(C++) -c $< $(INCLUDES) $(CFLAGS) -o "$@"

# rules to compile resource definition files
$(OBJ_DIR)/%.rsrc : %.rdef
	cat $< | $(CC) -E $(INCLUDES) $(CFLAGS) - | grep -v '^#' | $(RESCOMP) -o "$@" -
$(OBJ_DIR)/%.rsrc : %.RDEF
	cat $< | $(CC) -E $(INCLUDES) $(CFLAGS) - | grep -v '^#' | $(RESCOMP) -o "$@" -

#	rules to handle lex/flex and yacc/bison files

$(OBJ_DIR)/%.o: %.l
	flex $<
	$(CC) -c $(INCLUDES) $(CFLAGS) lex.yy.c -o "$@"
$(OBJ_DIR)/%.o: %.y
	bison -d -y $<
	$(CC) -c $(INCLUDES) $(CFLAGS) y.tab.c -o "$@"

#	empty rule. Things that depend on this rule will always get triggered
FORCE:

#	The generic clean command. Delete everything in the object folder.
clean :: FORCE
	-rm -rf "$(OBJ_DIR)"

#	remove just the application from the object folder
rmapp ::
	-rm -f $(TARGET)

# make it easy to install drivers for testing
USER_BIN_PATH = /boot/home/config/add-ons/kernel/drivers/bin
USER_DEV_PATH = /boot/home/config/add-ons/kernel/drivers/dev

driverinstall :: default
ifeq ($(TYPE), DRIVER)
	copyattr --data $(TARGET) $(USER_BIN_PATH)/$(NAME)
	mkdir -p $(USER_DEV_PATH)/$(DRIVER_PATH)
	ln -sf $(USER_BIN_PATH)/$(NAME) $(USER_DEV_PATH)/$(DRIVER_PATH)/$(NAME)
endif

install :: default
ifeq ($(INSTALL_DIR), )
	@echo "No install directory specified for \"$(NAME)\" (INSTALL_DIR is empty)" >&2
else
	mkdir -p "$(INSTALL_DIR)"
	cp $(TARGET) $(INSTALL_DIR)/$(NAME)
endif