源码安装apche
下载apache的源码包文件
访问http://mirror.bit.edu.cn/apache/httpd/，复制如下gz文件的链接地址，并使用wget下载到本地
wget -P /usr/local/src/ http://mirror.bit.edu.cn/apache/httpd/httpd-2.4.37.tar.bz2（各位不要直接复制我的下载地址，因为随着httpd的版本更新，这些地址会变化的）
[root@centos-linux-02 ~]# cd /usr/local/src/
[root@centos-linux-02 src]# ls
httpd-2.4.37.tar.bz2
这时候去解压，解压命令：
tar -xvf httpd-2.4.37.tar.bz2
[root@centos-linux-02 src]# ls
httpd-2.4.37 httpd-2.4.37.tar.bz2
进入到httpd-2.4.37目录下执行：./configure
这个时候你就会发现报错喽，显示如下：
[root@centos-linux-02 httpd-2.4.37]# ./configure
checking for chosen layout... Apache
checking for working mkdir -p... yes
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
configure:
configure: Configuring Apache Portable Runtime library...
configure:
checking for APR... no
configure: error: APR not found. Please read the documentation
好吧，通过提示，我们可以看到缺少APR，接下来去下载APR包
浏览器访问：http://mirror.bit.edu.cn/apache/apr/，去下载apr包和apr-unit包
wget -P /usr/local/src http://mirror.bit.edu.cn/apache/apr/apr-1.6.5.tar.bz2
wget -P /usr/local/src http://mirror.bit.edu.cn/apache/apr/apr-util-1.6.1.tar.bz2
解压所下载的包后，我们先去安装apr
[root@centos-linux-02 src]# cd apr-1.6.5/
[root@centos-linux-02 apr-1.6.5]# ./configure
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
Configuring APR library
Platform: x86_64-pc-linux-gnu
checking for working mkdir -p... yes
APR Version: 1.6.5
checking for chosen layout... apr
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/usr/local/src/apr-1.6.5':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details
这个时候又看到报错啦，好吧，通过提示我们可以看到缺少gcc环境，为此安装gcc编译环境
yum install gcc
ok,然后再次去执行./configure
然后编译安装：make && make install
[root@centos-linux-02 apr-1.6.5]# ls /usr/local/apr/
bin build-1 include lib
此时代表安装成功apr
安装apr-unit
去apr-unit目录下去执行./configure
[root@centos-linux-02 apr-util-1.6.1]# ./configure
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking target system type... x86_64-pc-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking for working mkdir -p... yes
APR-util Version: 1.6.1
checking for chosen layout... apr-util
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
Applying apr-util hints file rules for x86_64-pc-linux-gnu
checking for APR... no
configure: error: APR could not be located. Please use the --with-apr option
好吧，又报错哈哈，通过提示我们可以看到这是让我们使用--with-apr参数去指定刚刚安装完的apr路径，那么开始吧
./configure --help去查看执行命令参数与含义
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
--without-PACKAGE do not use PACKAGE (same as --with-PACKAGE=no)
--with-apr=PATH prefix for installed APR or the full path to apr-config
嗯，现在知道该怎么写了，
./configure --with-apr=/usr/local/apr
然后去编译并安装
make && make install
好吧，这次在编译的时候，出现了错误，错误如下：
xml/apr_xml.c:35:19: 致命错误：expat.h：没有那个文件或目录
#include <expat.h>
^
编译中断。
make[1]: *** [xml/apr_xml.lo] 错误 1
make[1]: 离开目录“/usr/local/src/apr-util-1.6.1”
make: *** [all-recursive] 错误 1
通过报错分析，应该是缺少expat，好吧，我们百度一下看看这是咋回事呢
那我们知道原因后，就安装呗
yum install expat-devel
这次编译安装过程就舒服多了，最后我们看到如下提示：
----------------------------------------------------------------------
Libraries have been installed in:
/usr/local/apr/lib
If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the '-LLIBDIR'
flag during linking and do at least one of the following:
- add LIBDIR to the 'LD_LIBRARY_PATH' environment variable
during execution
- add LIBDIR to the 'LD_RUN_PATH' environment variable
during linking
- use the '-Wl,-rpath -Wl,LIBDIR' linker flag
- have your system administrator add LIBDIR to '/etc/ld.so.conf'
See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
好吧，一看就知道安装到/usr/local/apr/lib下了
既然都装完了，那么我们去安装httpd去呗
在httpd下执行./configure
又报错了：
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking how to run the C preprocessor... gcc -E
checking for gcc option to accept ISO C99... -std=gnu99
checking for pcre-config... false
configure: error: pcre-config for libpcre not found. PCRE is required and available from http://pcre.org/
这次错误显然就是PCRE没有安装啊，嗯，源码编译真烦呢，为啥我不直接yum呢，哈哈
下载PCRE：
下载并解压：
wget -P /usr/local/src/ http://jaist.dl.sourceforge.net/project/pcre/pcre/8.42/pcre-8.42.tar.gz
tar -xvf pcre-8.42.tar.gz
进入pcre目录执行：./configure
查看执行结果发现，又不称心如意
configure: error: Invalid C++ compiler or C++ compiler flags
这明显是还需要gcc-c++环境啊，果断安装：
yum install gcc-c++
编译安装：
make && make install
这次终于可以去httpd目录执行./configure了吧,然后没有发现报错呢
编译安装httpd：
make && make install
好了，几经波折，我们去 /usr/local/apache2/bin 目录下找apachectl
执行启动脚本：
./apachectl
查看进程：
[root@centos-linux-02 bin]# ps -ef|grep httpd
root 16123 1 0 17:59 ? 00:00:00 /usr/local/apache2/bin/httpd
daemon 16124 16123 0 17:59 ? 00:00:00 /usr/local/apache2/bin/httpd
daemon 16125 16123 0 17:59 ? 00:00:00 /usr/local/apache2/bin/httpd
daemon 16126 16123 0 17:59 ? 00:00:00 /usr/local/apache2/bin/httpd
root 16209 4151 0 17:59 pts/0 00:00:00 grep --color=auto httpd
到此，apache的源码安装结束。
ok,最后我们来总结一下需要用到的源码包和编译环境
apr-1.6.5.tar.bz2
apr-util-1.6.1.tar.bz2
httpd-2.4.37.tar.bz2
pcre-8.42.tar.gz
gcc
gcc-c++
PCRE
expat-devel