# 需求
# 1. 支持多级目录,而无需在每个目录放置一个makefile
# 2. 支持自动识别C/CPP,并可以混合存在
# 3. 支持DEBUG模式
# 4. 支持动态库,静态库,可执行程序编译
# 5. 支持批量dos,unix换行格式相互转换
###########################################################################

# 当前目录
PROJECT_DIR = $(shell pwd)
###########################################################################
# 生成的目标类型
# so:动态库/bin:可执行程序/lib:静态库
TARGET_TYPE = bin

###########################################################################
# 头文件包含
INCLUDE_PATH = -I/usr/local/include -I$(PROJECT_DIR)/include 

# C/CPP都适用的选项
BUILD_FLAG = -Wall -Werror -Wextra 
# C适用的选项
BUILD_C_FLAG =
# CPP适用的选项
BUILD_CXX_FLAG =

#debug/realse相关的编译选项
BUILD_DEBUG_FLAG = -g3 -O0 -DDEBUG -D_DEBUG
BUILD_RELEASE_FLAG = -O3 -DRELEASE -D_RELEASE

# 预编译
PRE_DEFINED = -DTEST 

###########################################################################
# 链接选项
LD_LIB_STATIC = -lso
LD_LIB = -lpthread
LD_LIB_PATH = -L/usr/local/lib -L/root/test/so
LD_FLAG = 

# 目标程序名称
#PROGRAM = your_programe_name
PROGRAM =

# The C/C++ program compiler.
CC     = gcc
CXX    = g++

###########################################################################
#枚举文件
SOURCES = $(shell find . -mindepth 1 -name "*.c" )
CPP_SOURCES = $(shell find . -mindepth 1 \( -name "*.cpp" -o -name "*.cc" \) )
H_SOURCES = $(shell find . -mindepth 1 -name "*.h" )

#中间文件
OBJS    = $(addsuffix .o, $(basename $(SOURCES)))
OBJS    += $(addsuffix .o, $(basename $(CPP_SOURCES)))

#DEPS    = $(OBJS:.o=.d)

# 自动包含当前目录
INCLUDE_PATH += -I$(PROJECT_DIR)

# 默认是release
BUILD_TARGET_FLAG = $(BUILD_RELEASE_FLAG)

# 合并编译选项
BUILD_FLAG += $(BUILD_TARGET_FLAG)
BUILD_FLAG += $(PRE_DEFINED)
BUILD_C_FLAG += $(BUILD_FLAG)
BUILD_CXX_FLAG += $(BUILD_FLAG)

# 链接器
ifeq ($(strip $(CPP_SOURCES)),)
	LINKER = $(CC)
else
	LINKER = $(CXX)
endif

# 自动为静态库加上static
ifneq ($(strip $(LD_LIB_STATIC)),)
	LD_LIB_STATIC_TMP := $(LD_LIB_STATIC)
	LD_LIB_STATIC = -static $(LD_LIB_STATIC_TMP)
endif

###########################################################################
# 编译，链接命令
C_COMPILE = $(CC) $(INCLUDE_PATH) $(BUILD_C_FLAG) -c
CPP_COMPILE = $(CXX) $(INCLUDE_PATH) $(BUILD_CXX_FLAG) -c
LINK_COMPILE = $(LINKER) $(LD_FLAG) $(LD_LIB_PATH) $(LD_LIB) $(OBJS) $(LD_LIB_STATIC) -o $@

###########################################################################
# 自动生成程序名称
ifeq ($(strip $(PROGRAM)),)
	PROGRAM = $(shell pwd | sed "s/.*\///" )
endif

ifeq ($(strip $(TARGET_TYPE)),so)
	BUILD_FLAG += -fPIC
	LD_FLAG += -shared
	PROGRAM_TMP := $(PROGRAM)
	PROGRAM = lib$(PROGRAM_TMP).so
endif
ifeq ($(strip $(TARGET_TYPE)),lib)
	PROGRAM_TMP := $(PROGRAM)
	PROGRAM = lib$(PROGRAM_TMP).a
	LINK_COMPILE = ar crv $@ $(OBJS)
endif

###########################################################################
.PHONY:all clean show debug unix dos
###########################################################################
all:$(PROGRAM)

%.o:%.c
	$(C_COMPILE) $< -o $@
%.o:%.cc
	$(CPP_COMPILE) $< -o $@
%.o:%.cpp
	$(CPP_COMPILE) $< -o $@
%.o:%.c++
	$(CPP_COMPILE) $< -o $@
%.o:%.cp
	$(CPP_COMPILE) $< -o $@
%.o:%.cxx
	$(CPP_COMPILE) $< -o $@

$(PROGRAM):$(OBJS)
	$(LINK_COMPILE)

debug: BUILD_TARGET_FLAG = $(BUILD_DEBUG_FLAG)
debug: $(PROGRAM)

release: BUILD_TARGET_FLAG = $(BUILD_RELEASE_FLAG)
release: $(PROGRAM)

clean:
	rm -rf $(PROGRAM) $(OBJS)

show:
	@echo 'CC     :' $(CC)
	@echo 'CXX     :' $(CXX)
	@echo 'PROGRAM     :' $(PROGRAM)
	@echo 'SOURCES     :' $(SOURCES)
	@echo 'CPP_SOURCES     :' $(CPP_SOURCES)
	@echo 'H_SOURCES     :' $(H_SOURCES)

unix:
	@dos2unix $(SOURCES) $(CPP_SOURCES) $(H_SOURCES)
dos:
	@unix2dos $(SOURCES) $(CPP_SOURCES) $(H_SOURCES)

indent:
	indent -cdw -nbad -bap -nbc -bl -bli0 -i4 -npcs -nut -npsl -bfda -nbfde -l80 $(SOURCES) $(CPP_SOURCES) $(H_SOURCES)