# Compilation flags
ARCH_SPLIT = $(subst -, ,$(ARCH))
REAL_ARCH  = $(word 1,$(ARCH_SPLIT))
PLATFORM   = $(word 2,$(ARCH_SPLIT))

ifeq ($(REAL_ARCH), mips32)
CROSS_COMPILE = mips-linux-gnu-
endif

AS = $(CROSS_COMPILE)gcc
CC = $(CROSS_COMPILE)gcc
CXX = $(CROSS_COMPILE)g++
LD = $(CROSS_COMPILE)ld

INCLUDES  = $(addprefix -I, $(INC_DIR)) -I$(AM_HOME)/am/
INCLUDES += -I$(AM_HOME)/am/arch/$(ARCH)/include
CFLAGS   += -std=gnu99 -O2 -MMD -Wall -Werror -ggdb $(INCLUDES)
CXXFLAGS += -std=c++11 -O2 -MMD -Wall -Werror -ggdb $(INCLUDES)
ASFLAGS  +=                -MMD                     $(INCLUDES)

ifeq ($(REAL_ARCH), mips32)
CXX = $(CROSS_COMPILE)g++-5
CFLAGS_COMMON = -fno-pic -static -fno-strict-aliasing -fno-builtin -fno-stack-protector -fno-delayed-branch -mno-abicalls -march=mips32 -mno-check-zero-division -EL -mno-llsc -mno-imadd -mno-mad
CFLAGS   += $(CFLAGS_COMMON)
CXXFLAGS += $(CFLAGS_COMMON) -ffreestanding -fno-rtti -fno-exceptions
ASFLAGS  += -march=mips32 -EL -mno-check-zero-division -O0 -mno-abicalls -fno-pic -fno-delayed-branch
endif

ifeq ($(REAL_ARCH), x86)
CFLAGS   += -m32 -fno-builtin -fno-stack-protector -fno-omit-frame-pointer
CXXFLAGS += -m32 -fno-builtin -fno-stack-protector -fno-omit-frame-pointer -ffreestanding -fno-rtti -fno-exceptions
ASFLAGS  += -m32
endif

# Files to be compiled
OBJS = $(addprefix $(DST_DIR)/, $(addsuffix .o, $(basename $(SRCS))))

# Compilation patterns
$(DST_DIR)/%.o: %.cpp
	@mkdir -p $(dir $@)
	$(CXX) $(CXXFLAGS) -c -o $@ $<
$(DST_DIR)/%.o: %.c
	@mkdir -p $(dir $@)
	$(CC) $(CFLAGS) -c -o $@ $<
$(DST_DIR)/%.o: %.S
	@mkdir -p $(dir $@)
	$(AS) $(ASFLAGS) -c -o $@ $<

# Depencies
DEPS = $(addprefix $(DST_DIR)/, $(addsuffix .d, $(basename $(SRCS))))
-include $(DEPS)

# Dependent AM and libraries
.PHONY: $(LIBS) am
am:
	cd $(AM_HOME) && make
$(LIBS): %:
	cd $(AM_HOME)/libs/$* && make