PHP编译安装报错： mcrypt.h not found. Please reinstall libmcrypt.

解决方法：

1.为系统安装perl-Geo-IP，默认yum源中没有这个包，特意安装epel第三方yum源[root@aminglinux ~] rpm -Uvh http://mirrors.sohu.com/fedora-epel/6/x86_64/epel-release-6-8.noarch.rpm

Retrieving http://mirrors.sohu.com/fedora-epel/6/x86_64/epel-release-6-8.noarch.rpm

warning: /var/tmp/rpm-tmp.BM4bHz: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY

Preparing...                ########################################### [100%]   

1:epel-release           ########################################### [100%]

2.[root@aminglinux ~]#yum install -y libmcrypt-devel

[root@aminglinux ~]#Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

这里我们又遇到一个错误，解决方法：

解决办法是编辑/etc/yum.repos.d/epel.repo，把基础的恢复，镜像的地址注释掉

#baseur

lmirrorlist

改成

baseurl

#mirrorlist

步骤如下：（蓝色为需修改的地方）

[root@aminglinux ~]# vi /etc/yum.repos.d/epel.repo

[epel]

name=Extra Packages for Enterprise Linux 6 - $basearch

baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch

#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

failovermethod=priority

enabled=1

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

[epel-debuginfo]

name=Extra Packages for Enterprise Linux 6 - $basearch - Debug

baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug

#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearch

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

gpgcheck=1

[epel-source]

name=Extra Packages for Enterprise Linux 6 - $basearch - Source

baseurl=http://download.fedoraproject.org/pub/epel/6/SRPMS

#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearch

failovermethod=priority

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

gpgcheck=1

修改完之后保存退出。

3.再次运行yum install -y libmcrypt-devel

Installed:libmcrypt-devel.i686 0:2.5.8-9.el6 #安装完成

4.[root@aminglinux src]# cd php-5.3.27

    [root@localhost php-5.3.27]# ./configure \ --prefix=/usr/local/php \ --with-apxs2=/usr/sbin/apxs \ --with-config-file-path=/usr/local/php/etc \ --with-mysql=/usr/local/mysql \ --with-libxml-dir \ --with-gd \ --with-jpeg-dir \ --with-png-dir \ --with-freetype-dir \ --with-iconv-dir \ --with-zlib-dir \ --with-bz2 \ --with-openssl \ --with-mcrypt \ --enable-soap \ --enable-gd-native-ttf \ --enable-mbstring \ --enable-sockets \ --enable-exif \ --disable-ipv6

Thank you for using PHP.

[root@aminglinux php-5.3.27]# echo $?

0

！至此。问题解决。
原帖地址：http://blog.sina.com.cn/s/blog_b5dfe4870102wasu.html