Makefile.compile

$(shell mkdir -p $(DST_DIR))

OBJS      = $(addprefix $(DST_DIR)/, $(addsuffix .o, $(basename $(SRCS))))
AS        = $(CROSS_COMPILE)gcc
CC        = $(CROSS_COMPILE)gcc
CXX       = $(CROSS_COMPILE)g++
LD        = $(CROSS_COMPILE)ld
AR        = $(CROSS_COMPILE)ar
OBJDUMP   = $(CROSS_COMPILE)objdump
OBJCOPY   = $(CROSS_COMPILE)objcopy
READELF   = $(CROSS_COMPILE)readelf
INCLUDES += $(addprefix -I, $(INC_DIR)) -I$(AM_HOME)/am/
INCLUDES += -I$(AM_HOME)/am/include
CC_OPT	 ?= -O2
CFLAGS   += $(CC_OPT) -MMD -Wall -Werror -ggdb $(INCLUDES) \
            -D__ISA__=\"$(ISA)\" -D__ISA_$(shell echo $(ISA) | tr a-z A-Z)__ \
            -D__PLATFORM__=\"$(PLATFORM)\" -D__PLATFORM_$(shell echo $(PLATFORM) | tr a-z A-Z)__ \
            -D__ARCH__=$(ARCH) -D__ARCH_$(shell echo $(ARCH) | tr a-z A-Z | tr - _) \
            -DARCH_H=\"arch/$(ARCH).h\" \
            -fno-asynchronous-unwind-tables -fno-builtin -fno-stack-protector \
			-Wno-main
CXXFLAGS +=  $(CFLAGS) -ffreestanding -fno-rtti -fno-exceptions
ASFLAGS  += -MMD $(INCLUDES)

## Compliation rule for .c -> .o (using gcc)
$(DST_DIR)/%.o: %.c
	@mkdir -p $(dir $@) && echo + CC $<
	@$(CC) -std=gnu11 $(CFLAGS) -c -o $@ $(realpath $<)

## Compliation rule for .cpp -> .o (using g++)
$(DST_DIR)/%.o: %.cpp
	@mkdir -p $(dir $@) && echo + CXX $<
	@$(CXX) -std=c++11 $(CXXFLAGS) -c -o $@ $(realpath $<)

## Compliation rule for .S -> .o (using as)
$(DST_DIR)/%.o: %.S
	@mkdir -p $(dir $@) && echo + AS $<
	@$(AS) $(ASFLAGS) -c -o $@ $(realpath $<)

## Paste in dependencies (gcc generated .d) here
-include $(addprefix $(DST_DIR)/, $(addsuffix .d, $(basename $(SRCS))))

## Compilation rules for libraries
am:
	@$(MAKE) -s -C $(AM_HOME)

$(sort $(LIBS)): %:
	@$(MAKE) -s -C $(AM_HOME)/libs/$*

.PHONY: $(LIBS) am