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Makefile
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#-----------------------------------------------
# 生成程序名称
#-----------------------------------------------
target := test
#-----------------------------------------------
# 选择编译工具链
#-----------------------------------------------
CROSS =
export CC = ${CROSS}gcc
export AR = ${CROSS}ar
#-----------------------------------------------
# 全局编译参数变量
#-----------------------------------------------
export CFLAGS_ENV=-Wall -g -ffunction-sections -fdata-sections -std=c99 -fPIC
#-----------------------------------------------
# 全局编译路径变量
#-----------------------------------------------
export ROOT_DIR = $(shell pwd)
export BUILD_DIR = build/out
export OBJS_CACHE = $(BUILD_DIR)/objs.cache
#-----------------------------------------------
# 定义全局头文件路径
# 相对路径放 INCLUDE_ENV, 绝对路径放 INCLUDE_ABS_ENV
# （绝对路径头文件传递到子Makefile时无需转换路径）
#-----------------------------------------------
export INCLUDE_ENV = -I.
export INCLUDE_ABS_ENV = -I$(ROOT_DIR)
#-----------------------------------------------
# 生成程序输出路径，使用相对路径
#-----------------------------------------------
outdir := .
#-----------------------------------------------
# 源文件路径，使用相对路径
#-----------------------------------------------
# src := $(foreach d, $(srcdir), $(wildcard $(d)/*.c))
src := test.c strs.c
#-----------------------------------------------
# 编译参数
#-----------------------------------------------
CFLAGS := $(CFLAGS_ENV)
#-----------------------------------------------
# 链接参数
#-----------------------------------------------
LDFLAGS := -Wl,-Map=$(BUILD_DIR)/object.map,--cref,--gc-section -fPIC
#-----------------------------------------------
# 添加子模块，使用相对路径
#-----------------------------------------------
MOD :=
#-----------------------------------------------
# 头文件路径
#-----------------------------------------------
INCLUDE := $(INCLUDE_ENV) $(INCLUDE_ABS_ENV)
#-----------------------------------------------
# 链接时需要的静态库
#-----------------------------------------------
LIB +=
#-----------------------------------------------
# 编译前准备
#-----------------------------------------------
obj := $(src:.c=.o)
dep := $(src:.c=.d)
build := $(BUILD_DIR)
objs := $(addprefix $(build)/, $(obj))
deps := $(addprefix $(build)/, $(dep))
target_out := $(outdir)/$(target)
$(shell mkdir -p $(BUILD_DIR))
$(shell echo "" > $(OBJS_CACHE))
all: $(target_out)
@echo "All completed."
#-----------------------------------------------
# 子模块编译
#-----------------------------------------------
module: ${MOD}
${MOD}:
@echo
@+${MAKE} -C $@
@echo
#-----------------------------------------------
# 生成程序
#-----------------------------------------------
$(target_out): $(objs) module
@mkdir -p $(outdir)
@sort -u $(OBJS_CACHE) -o $(OBJS_CACHE)
$(CC) -o $(target_out) $(objs) $$(cat $(OBJS_CACHE)) -Xlinker "-(" $(LIB) -Xlinker "-)" $(LDFLAGS)
@echo "-------------------------------------------"
@echo "Generate $(target) successs."
@echo "-------------------------------------------"
-include $(deps)
#-----------------------------------------------
# 生成.o文件的所有依赖关系
#-----------------------------------------------
$(build)/%.o: %.c
@mkdir -p $(dir $@)
$(CC) $(CFLAGS) $(INCLUDE) -c $< -o $@
#-----------------------------------------------
# 生成.d文件的所有依赖关系
#-----------------------------------------------
$(build)/%.d: %.c
@set -e; mkdir -p $(@D); rm -f $@; \
$(CC) -MM $(CFLAGS) $(INCLUDE) $< > $@.$$$$; \
sed 's,\($(*F)\)\.o[ :]*,$(build)/$(<D)/\1.o $@ : ,g' < $@.$$$$ > $@; \
rm -f $@.$$$$;\
#echo "generate dependencies $(@F) ."
.PHONY: clean clean_all ${MOD} all module $(MOD_CLEAN) $(MOD_CLEAN_ALL)
#-----------------------------------------------
# 子模块clean
#-----------------------------------------------
MOD_CLEAN = $(addprefix clean_, ${MOD})
$(MOD_CLEAN):
@echo
@+${MAKE} -C $(patsubst clean_%,%,$@) clean
@echo
MOD_CLEAN_ALL = $(addprefix clean_all_, ${MOD})
$(MOD_CLEAN_ALL):
@echo
@+${MAKE} -C $(patsubst clean_all_%,%,$@) clean_all
@echo
clean: $(MOD_CLEAN)
@echo "Cleanning ..."
-@rm -f $(target_out) $(objs) $(OBJS_CACHE)
@echo "Clean completed."
clean_all: $(MOD_CLEAN_ALL)
-@rm -rf $(BUILD_DIR) $(target_out)
@echo "Remove build/out dir."