target = ringbuffer

build_type ?= release
build_type_dir ?= release
build_dir = build/${build_type_dir}
obj_dir := ${build_dir}/obj
bin_dir := ${build_dir}/bin

ifeq (${build_type}, release)
	build_type_dir := release
	DRFLAGS := -O3 -w
else
	build_type_dir = debug
	DRFLAGS := -g3 -DDEBUG=1 -Wall -v
endif

gcc_std := -std=gnu99
g++_std := -std=c++11
includes = src

CFLAGS := ${DRFLAGS} ${gcc_std} ${addprefix -I,${includes}}
CXXFLAGS := ${DRFLAGS} ${g++_std} ${addprefix -I,${includes}}

src_sources := $(shell find src -name '*.cpp' -or -name '*.c')
example_sources :=  $(shell find examples -name '*.cpp' -or -name '*.c')
sources := ${src_sources} ${example_sources}
objects := $(sources:%=$(obj_dir)/%.o)

# 默认目标：构建最终的可执行文件
all: $(bin_dir)/$(target)

# 链接目标：将所有.o文件链接成可执行文件
$(bin_dir)/$(target): $(objects)
	@mkdir -p $(dir $@)
	${CC} $^ -o $@

# c source
$(obj_dir)/%.c.o: %.c
	@mkdir -p $(dir $@)
	${CC} ${CFLAGS} -c $< -o $@

# c++ source
$(obj_dir)/%.cpp.o: %.cpp
	mkdir -p $(dir $@)
	${CXX} ${CXXFLAGS} -c $< -o $@
	
.PHONY: clean

clean:
	rm -r ${build_dir}