apache2.4版本需要依赖apr以及apr-util、pcre，首先下载并解压apr及apr-util、pcre
wget -P /home/downloads/ https://mirrors.tuna.tsinghua.edu.cn/apache/apr/apr-1.6.2.tar.gz
wget -P /home/downloads/ https://mirrors.tuna.tsinghua.edu.cn/apache/apr/apr-util-1.6.0.tar.gz
wget -P /home/downloads/ https://sourceforge.net/projects/pcre/files/pcre/8.41/pcre-8.41.tar.gz
tar -zxvf apr-1.6.2.tar.gz
tar -zxvf apr-util-1.6.0.tar.gz
tar -zxvf pcre-8.41.tar.gz进入apr目录编译并安装apr
./configure --prefix=/usr/local/apr
make && make install进入apr-util目录编译安装apr-util，注意./configure配置时要使用-with-指定apr的路径
./configure --prefix=/usr/local/apr-util -with-apr=/usr/local/apr/bin/apr-1-config
make && make install若make报错：xml/apr_xml.c:35:19: 错误：expat.h：没有那个文件或目录，执行yum -y install expat-devel安装expat即可
进入pcre目录编译安装pcre，若提示You need a C++ compiler for C++ support，则需要先安装gcc-c++
yum -y install gcc-c++
./configure -prefix=/usr/local/pcre
make && make install最后编译安装apache
./configure --prefix=/usr/local/httpd2 -with-apr=/usr/local/apr/ -with-apr-util=/usr/local/apr-util/ -with-pcre=/usr/local/pcre/
make && make install若make出现以下错误
collect2: ld returned 1 exit status
make[2]: *** [htpasswd] 错误 1
make[2]: Leaving directory `/home/downloads/httpd-2.4.27/support'
make[1]: *** [all-recursive] 错误 1
make[1]: Leaving directory `/home/downloads/httpd-2.4.27/support'
make: *** [all-recursive] 错误 1按网上说法应该如下操作，但我操作之后仍旧报错，后yum安装了apache之后再源码安装才成功
mv /usr/lib/libm.a /usr/lib/libm.a.bak
mv /usr/lib/libm.so /usr/lib/libm.so.bak
mv /usr/lib/libexpat.so /usr/lib/libexpat.so.bak
ln -s /usr/lib64/libm.a /usr/lib/libm.a
ln -s /usr/lib64/libm.so /usr/lib/libm.so
ln -s /usr/lib64/libexpat.so /usr/lib/libexpat.so