linux - 我怎样才能使我的 Makefile 更好？

Question

我正在努力学习项目的“最佳实践”makefile。

请查看下面我的 Makefile 文件并提出更改建议以增强它。

目录布局:

root dir
---  Makefile
deps
---  deps
bin
---  binary
objs
---  all .o files
include
---  all .h files
src
---  all .c .cc files

生成文件:

#
# Generic makefile
#

all: tengine test2

#
# Include files for compiling, and libraries for linking.
#

INC=-I /usr/include -I /usr/local/include -I /usr/include/hiredis

LIB=-lhiredis

#
# Debug or not debug?
#

DEBUG=1

ifdef DEBUG
    CFLAGS=-Wall -Winline -pipe -g -DDEBUG #-pedantic -pg 
else
    CFLAGS=-Wall -Winline -pipe -O3 -march=native -funroll-all-loops \
           -finline-functions #-pedantic 
endif

#CXXFLAGS=$(CFLAGS)


# Rules for creating dependency files

deps/%.d: src/%.cc
    @echo Generating $@
    @mkdir -p $(dir $@)
    $(CXX) $(CXXFLAGS) $(INC) -MM -MT '$(patsubst src/%,obj/%,%(patsubst %.cc,%.o,$<))' $< > $@

deps/%.d: src/%.c
    @echo Generating $@
    @mkdir -p $(dir $@)
    $(CXX) $(CXXFLAGS) $(INC) -MM -MT '$(patsubst src/%,obj/%,%(patsubst %.c,%.o,$<))' $< > $@


# Rules for compilation
#
# C source with header and no c++ code

obj/%.o: src/%.c src/%.h deps/%.d
    @echo Compiling $@
    @mkdir -p $(dir $@)
    $(CC) $(CFLAGS) $(INC) -o $@ -c $<

# C++ source with header.

obj/%.o: src/%.cc src/%.h deps/%.d 
    @echo Compiling $@
    @mkdir -p $(dir $@)
    $(CXX) $(CXXFLAGS) $(INC) -o $@ -c $<

# C source without header and no c++ code

obj/%.o: src/%.c deps/%.d
    @echo Compiling $@
    @mkdir -p $(dir $@)
    $(CC) $(CFLAGS) $(INC) -o $@ -c $<

# C++ source without header.

obj/%.o: src/%.cc deps/%.d 
    @echo Compiling $@
    @mkdir -p $(dir $@)
    $(CXX) $(CXXFLAGS) $(INC) -o $@ -c $<

# ##############################################################
#
# TARGET: tengine
#
# ##############################################################

OBJS= obj/main.o obj/tengine.o 

tengine: $(OBJS)
    $(CXX) -pipe $(CXXFLAGS) -o bin/tengine $(OBJS) $(LIB)

# ##############################################################
#
# TARGET: test2
#
# ##############################################################

OBJS= obj/main.o obj/test2.o 

test2: $(OBJS)
    $(CXX) -pipe $(CXXFLAGS) -o bin/test2 $(OBJS) $(LIB)

# ##############################################################
#
# Cleanup
#
# ##############################################################

clean:
    rm -f *~ bin/* obj/* deps/* src/*~ gmon.out

help:

@echo ""
@echo "make     - builds tengine"
@echo "make test2   - builds test2"
@echo "make all     - builds tengine test2"
@echo "make clean   - deletes prior build"

Answer 1

如果您希望其他人使用您的 Makefile，请始终包含一个 help 目标，该目标打印出一条消息，详细说明可以从命令行调用的各种目标，以及各种环境变量可以合理设置做各种事情...