It has been a long time that i haven't update my apache...

It is very easy to do with Gentoo but this time it give me an error.

/usr/lib/apache2/modules/mod_dav_svn.so: undefined symbol: dav_register_provider

After googled awhile ... i found that is related to dav of apache, at that time i really don't know why there exist such problem. As my svn server have been up for at least 5 years. It never get such problem.

Finally it works after I load the dav before svn module.

LoadModule dav_module modules/mod_dav.so
LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule dav_lock_module modules/mod_dav_lock.so
DavLockDB "/var/lib/dav/lockdb"

if you are using the same OS as me and you have compiled apache with dav options. Just add "-DDAV" to APACHE2_OPTS in /etc/conf.d/apache2