Apache遇到的问题：APR not found

#./configure --prefix……检查编辑环境时出现：

checking for APR... no
configure: error: APR not found .  Please read the documentation.

可以用./configure –help | grep apr 查看帮助。
--with-included-apr     Use bundled copies of APR/APR-Util
--with-apr=PATH         prefix for installed APR or the full path to apr-config
--with-apr-util=PATH    prefix for installed APU or the full path to
安装APR(Apache Portable Runtime )
下载：

#cd /tmp/52lamp/ //源码存放位置
#tar -zxvf apr-1.4.2.tar.gz //unzip -o apr-1.4.2.zip
#cd apr-1.4.2
#./configure
#make
#make install

再次检查编译环境出现

checking for APR-util... no
configure: error: APR-util not found .  Please read the documentation.

#./configure –help | grep apr-util
--with-apr-util=PATH    prefix for installed APU or the full path to

下载：
#tar -zxvf apr-util-1.3.9.tar.gz
#cd apr-util-1.3.9
#./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
#make
#make install

./configure仍提示APR-util not found，增加--with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util后出现
configure: error: pcre-config for libpcre not found. PCRE is required and available from 

#./configure –help | grep pcre
--with-pcre=PATH        Use external PCRE library

下载：
#unzip -o pcre-8.10.zip
#cd pcre-8.10
#./configure --prefix=/usr/local/pcre
#make
#make install

继续安装Apache/httpd，./configure 时加上参数 --with-apr=/usr/local/apr/ --with-apr-util=/usr/local/apr-util/ --with-pcre=/usr/local/pcre，这个问题就解决了

注意：Apache在安装时不会检查参数是否正确，错误的参数会直接被丢弃，不会报告给用户。但可以使用echo $?命令检查是否有错误，当输出结果为0时表示没有错误。

#echo $?
0

#make
#make install

复制Apache启动文件
#cp /usr/local/httpd/bin/apachectl /sbin/

启动Apache
#apachectl start

设置Apache开机自启动
#vi /etc/rc.d/rc.local
增加一行 /sbin/apachectl start

或者将httpd服务添加到ntsysv服务管理工具
#apachectl stop //关闭Apache以免不必要的麻烦
#cp /usr/local/httpd/bin/apachectl /etc/rc.d/init.d/httpd
#vi /etc/rc.d/init.d/httpd
修改为
#!/bin/sh
#
#chkconfig: 345 85 15 //#不能省略，注意空格
#description: httpd for 52lamp 20101016 21:54 //任意字符串
#
......

第二行中345的含义：
#       0 - operation completed successfully
#       1 -
#       2 - usage error
#       3 - httpd could not be started
#       4 - httpd could not be stopped
#       5 - httpd could not be started during a restart

修改有关权限
#cd /etc/rc.d/init.d/
#chmod a+x httpd
#chkconfig --add httpd

#ntsysv
httpd已经在列表中，按F1可以看到刚才编写的服务描述httpd for 52lamp 20101016 21:54。

#apachectl start
#ps -e |grep httpd
23247 ?        00:00:00 httpd
23248 ?        00:00:00 httpd
23249 ?        00:00:00 httpd
23251 ?        00:00:00 httpd
23252 ?        00:00:00 httpd

在浏览器中输入127.0.0.1，看起来一切正常；但是局域网内其他电脑不能访问！

#service iptables stop

如果不想关闭防火墙，放开80端口即可。

#vi /etc/sysconfig/iptables
增加一行-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
#service iptables restart //重启防火墙

现在一切OK