boa源码分析(1)--Makefile

http://blog.csdn.net/jemofh159/article/details/7912919

# Generated automatically from Makefile.in by configure.
# $Id: Makefile.in,v 1.59 2002/03/24 22:20:19 jnelson Exp $
//本makefile 由autotools生成
.SUFFIXES:
.SUFFIXES: .o .c //去掉原后缀,添加新后缀
.PHONY: clean mrclean distclean depend all dist //伪目标

GCC_FLAGS = -Wstrict-prototypes -Wpointer-arith -Wcast-align -Wcast-qual\
  -Wtraditional\
  -Wshadow\
  -Wconversion\
  -Waggregate-return\
  -Wmissing-prototypes\
  -Wnested-externs\
  -Wall \
  -Wundef -Wwrite-strings -Wredundant-decls -Winline


srcdir = .
VPATH = .:./../extras   //如果依赖文件或目标文件在当前目录下没找到的话,就到这两个目录来找(这两个目录由冒号分隔)
#LDFLAGS =  -g
LIBS =
CFLAGS += -pipe -Wall -I.

# Change these if necessary

YACC = bison -y //yacc是个语法分析器   生成的文件后缀为.Y
LEX = flex //词法分析器，生成的文件后缀为.L
#CC = arm-linux-gcc
#CPP = arm-linux-gcc -E

SOURCES = alias.c boa.c buffer.c cgi.c cgi_header.c config.c escape.c \
    get.c hash.c ip.c log.c mmap_cache.c pipe.c queue.c read.c \
    request.c response.c select.c signals.c util.c sublog.c

OBJS = y.tab.o lex.yy.o $(SOURCES:.c=.o) timestamp.o //$(SOURCES:.c=.o)用了替换，将SOURCES中的.c替换成了.o
//all是伪目标,默认目标
all:    boa boa_indexer
    rm -rf $(OBJS)
    chmod +x boa
    @echo "build boa finish."

boa:    $(OBJS)
    $(CC) -o $@  $^ $(LDFLAGS) $(LIBS) //$@ $^  $?  $<   $*都是自动化变量

boa_indexer:    index_dir.o escape.o
    $(CC) -o $@  $^ $(LDFLAGS) $(LIBS)

clean:
    rm -f $(OBJS) boa core lex.yy.c y.tab.c y.tab.h *~ boa_indexer index_dir.o *.d

distclean:  mrclean

mrclean:    clean
    rm -f config.status config.cache config.h Makefile config.log

# parser dependencies

y.tab.c y.tab.h:    boa_grammar.y
    $(YACC) -d $^

lex.yy.c:   boa_lexer.l
    $(LEX) $^

# timestamp

timestamp.o:    $(SOURCES) boa_grammar.y boa_lexer.l
// 用gcc -MM可以生成源文件的依赖关系，.depend文件原来都有了，可以make depend重新制作
# depend stuff
.depend:
    $(CPP) -MM $(SOURCES) > .depend  // ">"重定向

depend:
    -rm -f .depend
    $(MAKE) .depend

include .depend

# tags
tags:   $(SOURCES)  //更新所有的目标，以备完整地重编译使用。
    ctags -o tags $^ *.h

# dist
dist:
    $(MAKE) clean
    ./makedist.sh

# object dump
boa.objdump:    boa
    objdump --disassemble-all --source boa > $@