libsvn_subr-1.so.0: undefined symbol: apr_atomic_xchgptr 故障解决

源码编译安装完成之后，查看svn的安装版本会报以下错误

svn: symbol lookup error: /usr/local/subversion/lib/libsvn_subr-1.so.0: undefined symbol: apr_atomic_xchgptr

问题是出在了libsvn_subr-1.so.0库文件上，那就先查看一下它所依赖的动态连接库信息吧

        ldd /usr/local/subversion/lib/libsvn_subr-1.so.0

        linux-vdso.so.1 =>  (0x00007fff023fd000)

        libaprutil-1.so.0 => /usr/local/apr-util/lib/libaprutil-1.so.0 (0x00002ac3fe99f000)

        libapr-1.so.0 => /usr/local/apr/lib/libapr-1.so.0 (0x00002ac3febc3000)

        libuuid.so.1 => /lib64/libuuid.so.1 (0x00002ac3fee02000)

        librt.so.1 => /lib64/librt.so.1 (0x00002ac3ff006000)

        libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00002ac3ff210000)

        libexpat.so.0 => /lib64/libexpat.so.0 (0x00002ac3ff448000)

        libz.so.1 => /usr/lib64/libz.so.1 (0x00002ac3ff66a000)

        libdl.so.2 => /lib64/libdl.so.2 (0x00002ac3ff87f000)

        libpthread.so.0 => /lib64/libpthread.so.0 (0x00002ac3ffa83000)

        libmagic.so.1 => /usr/lib64/libmagic.so.1 (0x00002ac3ffc9e000)

        libc.so.6 => /lib64/libc.so.6 (0x00002ac3ffeae000)

        /lib64/ld-linux-x86-64.so.2 (0x00000038e5200000)

问题找到了，libaprutil-1.so.0和libapr-1.so.0两个库文件连接的还是操作系统自带的apr和aprutil库文件，没有使用我之前编译安装的最新的库文件，依赖出错造成的这种问题。

1、不用卸载操作系统原有包，更改libaprutil-1.so.0和libapr-1.so的链接位置

rm /usr/lib64/libapr-1.so.0

ln -s /usr/local/apr/lib/libapr-1.so.0 /usr/lib64/libapr-1.so.0

rm /usr/lib64/libaprutil-1.so.0

ln -s /usr/local/apr-util/lib/libaprutil-1.so.0  /usr/lib64/libaprutil-1.so.0

2、卸载操作系统自带的这两个包，然后将最新编译的apr相关类库目录的位置打到/etc/ld.so.conf文件中，然后执行ldconfig就OK

# rpm -qa|grep apr

apr-util-1.2.7-11.el5_5.2

apr-1.2.7-11.el5_6.5

apr-util-1.2.7-11.el5_5.2

apr-1.2.7-11.el5_6.5



#rpm -e --allmatches apr-util

#rpm -e --allmatches  apr

#echo '/usr/local/apr/lib'>>/etc/ld.so.conf

#echo '/usr/local/apr-util/lib'>>/etc/ld.so.conf

#ldconfig　

再次进行版本的检查，已经返回成功了。

# svn --version

svn, version 1.8.13 (r1667537)

   compiled Jun  4 2015, 10:01:00 on x86_64-unknown-linux-gnu



Copyright (C) 2014 The Apache Software Foundation.

This software consists of contributions made by many people;

see the NOTICE file for more information.

Subversion is open source software, see http://subversion.apache.org/



The following repository access (RA) modules are available:



* ra_svn : Module for accessing a repository using the svn network protocol.

  - with Cyrus SASL authentication

  - handles 'svn' scheme

* ra_local : Module for accessing a repository on local disk.

  - handles 'file' scheme