#
# Copyright (c) 2006 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

.PHONY: all clean

include Makefile.common

INCLUDES = generic/include
OPTIMIZATION = 3

DEFS = -DRELEASE=$(RELEASE) "-DCOPYRIGHT=$(COPYRIGHT)" "-DNAME=$(NAME)" -D__$(BITS)_BITS__ -D__$(ENDIANESS)__

GCC_CFLAGS = -I$(INCLUDES) -O$(OPTIMIZATION) -imacros $(CONFIG_HEADER) \
	-fexec-charset=UTF-8 -fwide-exec-charset=UTF-32$(ENDIANESS) \
	-finput-charset=UTF-8 -ffreestanding -fno-builtin -nostdlib -nostdinc \
	-Wall -Wextra -Wno-unused-parameter -Wmissing-prototypes \
	-std=gnu99 -Werror-implicit-function-declaration -Wwrite-strings \
	-pipe

ICC_CFLAGS = -I$(INCLUDES) -O$(OPTIMIZATION) -imacros $(CONFIG_HEADER) \
	-ffreestanding -fno-builtin -nostdlib -nostdinc -Wall -Wmissing-prototypes \
	-Werror-implicit-function-declaration -wd170

CLANG_CFLAGS = -I$(INCLUDES) -O$(OPTIMIZATION) -imacros $(CONFIG_HEADER) \
	-fexec-charset=UTF-8 -fwide-exec-charset=UTF-32$(ENDIANESS) \
	-finput-charset=UTF-8 -ffreestanding -fno-builtin -nostdlib -nostdinc \
	-Wall -Wextra -Wno-unused-parameter -Wmissing-prototypes \
	-Werror-implicit-function-declaration -Wwrite-strings \
	-pipe -arch $(CLANG_ARCH)

ifeq ($(CONFIG_DEBUG),y)
	GCC_CFLAGS += -Werror
	ICC_CFLAGS += -Werror
endif

ifeq ($(CONFIG_LINE_DEBUG),y)
	GCC_CFLAGS += -g
	ICC_CFLAGS += -g
	CLANG_CFLAGS += -g
endif

ifeq ($(COMPILER),gcc_native)
	CFLAGS = $(GCC_CFLAGS) $(EXTRA_CFLAGS)
	DEPEND_DEFS = $(DEFS) $(CONFIG_DEFS)
endif

ifeq ($(COMPILER),gcc_cross)
	CFLAGS = $(GCC_CFLAGS) $(EXTRA_CFLAGS)
	DEPEND_DEFS = $(DEFS) $(CONFIG_DEFS)
endif

ifeq ($(COMPILER),icc)
	CFLAGS = $(ICC_CFLAGS) $(EXTRA_CFLAGS)
	DEPEND_DEFS = $(DEFS) $(CONFIG_DEFS)
endif

ifeq ($(COMPILER),clang)
	CFLAGS = $(CLANG_CFLAGS) $(EXTRA_CFLAGS)
	DEPEND_DEFS = $(DEFS) $(CONFIG_DEFS)
endif

OBJECTS := $(addsuffix .o,$(basename $(SOURCES)))
COMPONENT_OBJECTS := $(addsuffix .co,$(basename $(MODULES)))

all: $(VERSION_DEF) $(COMMON_MAKEFILE) $(COMMON_HEADER) $(CONFIG_MAKEFILE) $(CONFIG_HEADER) $(BOOT_OUTPUT)
	-[ -f $(DEPEND) ] && cp -a $(DEPEND) $(DEPEND_PREV)

clean:
	rm -f $(RAW) $(MAP) $(ARCH_INCLUDE) $(GENARCH_INCLUDE)

-include $(DEPEND)

$(BOOT_OUTPUT): $(RAW)
	$(OBJCOPY) -O $(BFD_OUTPUT) $< $@

$(RAW): $(OBJECTS) $(COMPONENT_OBJECTS) $(LINK)
	$(LD) -n $(LFLAGS) -T $(LINK) -M -Map $(MAP) -o $@ $(COMPONENT_OBJECTS) $(OBJECTS)

$(LINK): $(LINK).comp $(DEPEND)
	$(GCC) $(DEFS) $(GCC_CFLAGS) -D__ASM__ -D__LINKER__ -E -x c $(LINK).comp | grep -v "^\#" > $(LINK)

%.o: %.S $(DEPEND)
	$(CC) $(DEFS) $(CFLAGS) -D__ASM__ -c $< -o $@
ifeq ($(PRECHECK),y)
	$(JOBFILE) $(JOB) $< $@ as asm/preproc $(DEFS) $(CFLAGS) -D__ASM__
endif

%.o: %.c $(DEPEND)
	$(CC) $(DEFS) $(CFLAGS) -c $< -o $@
ifeq ($(PRECHECK),y)
	$(JOBFILE) $(JOB) $< $@ cc core $(DEFS) $(CFLAGS)
endif

$(DEPEND): $(ARCH_INCLUDE) $(GENARCH_INCLUDE) $(COMMON_HEADER_ARCH)
	makedepend -f - -- $(DEPEND_DEFS) $(CFLAGS) -- $(SOURCES) > $@ 2> /dev/null
	-[ -f $(DEPEND_PREV) ] && diff -q $(DEPEND_PREV) $@ && mv -f $(DEPEND_PREV) $@

$(ARCH_INCLUDE): arch/$(KARCH)/include/
	ln -sfn ../../$< $@

$(GENARCH_INCLUDE): genarch/include/
	ln -sfn ../../$< $@

$(COMMON_HEADER_ARCH): $(COMMON_HEADER)
	ln -sfn ../../../$< $@