Makefile.defaults

#2016-2019 Tong Zhang <ztong@vt.edu>
#2020-2021 Tong Zhang <ztong0001@gmail.com>

TARGET_EXEC ?= a.out

BUILD_DIR ?= ./build
SRC_DIRS ?= ./

SRCS := $(shell find $(SRC_DIRS) -name "*.cpp" -or -name "*.c" -or -name "*.s" -or -name "*.C" -or -name "*.CPP" -or -name "*.cc")
OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
DEPS := $(OBJS:.o=.d)

SPEC_FLAGS :=

INC_DIRS := $(shell find $(SRC_DIRS) -type d)
INC_FLAGS := $(addprefix -I,$(INC_DIRS))

CXXFLAGS := $(CXXFLAGS) $(INC_FLAGS) $(SPEC_FLAGS) 
CFLAGS := $(CFLAGS) $(INC_FLAGS) $(SPEC_FLAGS) 

LINK=$(CXX)

$(BUILD_DIR)/$(TARGET_EXEC): $(OBJS)
	$(LINK) $(OBJS) -o $@ $(LDFLAGS)

# assembly
$(BUILD_DIR)/%.s.o: %.s
	$(MKDIR_P) $(dir $@)
	$(AS) $(ASFLAGS) -c $< -o $@

# c source
$(BUILD_DIR)/%.c.o: %.c
	$(MKDIR_P) $(dir $@)
	$(CC) $(CFLAGS) -c $< -o $@

# c source
$(BUILD_DIR)/%.C.o: %.C
	$(MKDIR_P) $(dir $@)
	$(CC) $(CFLAGS) -c $< -o $@


# c++ source
$(BUILD_DIR)/%.cpp.o: %.cpp
	$(MKDIR_P) $(dir $@)
	$(CXX) $(CXXFLAGS) -c $< -o $@

# c++ source
$(BUILD_DIR)/%.CPP.o: %.CPP
	$(MKDIR_P) $(dir $@)
	$(CXX) $(CXXFLAGS) -c $< -o $@

# c++ source
$(BUILD_DIR)/%.cc.o: %.cc
	$(MKDIR_P) $(dir $@)
	$(CXX) $(CXXFLAGS) -c $< -o $@

.PHONY: clean

SCOPE_FILE = cscope.out
TAG_FILE   = tags

clean:
	$(RM) -r $(BUILD_DIR) ${SCOPE_FILE} ${TAG_FILE} ${JUNK}

-include $(DEPS)

MKDIR_P ?= mkdir -p

tags:
	rm -f ${SCOPE_FILE} scope.* ${TAG_FILE}
	find ${SRC_DIRS} -type f \
    -a \( -name "*.h" -o -name "*.hpp" -o -name "*.cpp" -o -name "*.c" \
    -o -name "*.cc" \) > ${SCOPE_FILE}
	ctags -I "__THROW __nonnull __attribute_pure__ __attribute__ G_GNUC_PRINTF+" \
		--file-scope=yes --c++-kinds=+px --c-kinds=+px --fields=+iaS -Ra --extra=+fq \
		--langmap=c:.c.h.pc.ec --languages=c,c++ --links=yes \
		-f ${TAG_FILE} -L ${SCOPE_FILE}
	cscope -Rb -i ${SCOPE_FILE}

indent:
	clang-format -i -style=file `find $d -name '*.cpp' -or -name "*.h" -or -name "*.c" -or -name "*.cc"`