64位系统下编译PHP找不到库文件问题
最近在64位系统上编译5.4.5版的PHP时，遇到报以下错：
checking for DSA_get_default_method in -lssl... yes checking for X509_free in -lcrypto... yes checking for pkg-config... /usr/bin/pkg-config configure: error: Cannot find OpenSSL's libraries
指定的编译参数：
./configure \ --prefix=/usr/local/services/php-5.4.5 \ --with-config-file-path=/usr/local/services/php-5.4.5/etc \ --enable-fpm \ --enable-mbstring \ --enable-soap \ --enable-sockets \ --enable-zip \ --with-curl=/usr \ --with-mysql=mysqlnd \ --with-mysqli=mysqlnd \ --with-pdo-mysql=mysqlnd \ --with-gd \ --with-jpeg-dir=/usr \ --with-png-dir=/usr \ --with-zlib-dir=/usr \ --with-freetype-dir=/usr \ --with-openssl=/usr
找不到openssl的库文件，但我明明有安装openssl-devel的，很奇怪，网上搜了一下，发现有很多朋友，遇到了同样的问题，有些人说--with-openssl不指定路径可解决，尝试了一下，的确编译通过了，但想不通，Why?后来，又搜了一些文章来看，终于找出问题的根源：安装的系统是64位的，而64位的用户库文件默认是在/usr/lib64，而我编译的时候，没有指定--with-libdir=lib64，而编译脚本默认是lib，这当然是找不到的。
将编译参数更改为：
./configure \ --prefix=/usr/local/services/php-5.4.5 \ --with-config-file-path=/usr/local/services/php-5.4.5/etc \ --enable-fpm \ --enable-mbstring \ --enable-soap \ --enable-sockets \ --enable-zip \ --with-curl=/usr \ --with-mysql=mysqlnd \ --with-mysqli=mysqlnd \ --with-pdo-mysql=mysqlnd \ --with-gd \ --with-jpeg-dir=/usr \ --with-png-dir=/usr \ --with-zlib-dir=/usr \ --with-freetype-dir=/usr \ --with-openssl=/usr \ --with-libdir=lib64
问题解决。
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