RHLS5.4上配置postfix邮件服务器

大家好，小弟是新手，最近忙着配个邮件服务器，在安装 httpd-2.2.4的时候出现问题，首先是在编译的最后一行出现config.status: executing default commands
我的编译文件是：#./configure
--prefix=/usr/local/apache
--syscOnfdir=/etc/httpd
--enable-so
--enable-ssl
--with-ssl=/usr/local/ssl
--enable-track-vars
--enable-rewrite
--with-zlib
--enable-mods-shared=most
--enable-suexec
--with-suexec-caller=daemon
然后在make之后就出现这样的问题：
xlate/xlate.lo dbd/apr_dbd_sqlite3.lo dbd/apr_dbd.lo dbd/apr_dbd_sqlite2.lo dbd/apr_dbd_pgsql.lo -luuid -lrt -lcrypt -lpthread -ldl -lsqlite3 /usr/lib/libexpat.la /usr/local/src/httpd-2.2.4/srclib/apr/libapr-1.la -luuid -lrt -lcrypt -lpthread -ldl
/usr/lib/libexpat.so: could not read symbols: File in wrong format
collect2: ld returned 1 exit status
make[3]: *** [libaprutil-1.la] 错误 1
make[3]: Leaving directory `/usr/local/src/httpd-2.2.4/srclib/apr-util'
make[2]: *** [all-recursive] 错误 1
make[2]: Leaving directory `/usr/local/src/httpd-2.2.4/srclib/apr-util'
make[1]: *** [all-recursive] 错误 1
make[1]: Leaving directory `/usr/local/src/httpd-2.2.4/srclib'
make: *** [all-recursive] 错误 1
请问这是什么问题？我应该如何去解决！