以前碰到过在RHEL下编译pam_mysql出错的问题：
wget http://xxx/yyy/pam_mysql-0.xx.tar.gz
tar -zxvf pam_mysql-0.xx.tar.gz
cd pam_mysql-0.xx
./configure
make
这样操作是会出错地
./configure --with-openssl
make
make install
cp /usr/lib/security/pam_mysql.so /lib/security/
