Ryzom

You will need a recent one, at least CentOS 6.
I've tested with an older one, i had to build a recent gcc compiler and more.
And the same way as for any distro, you will build from source.
http://dev.ryzom.com/projects/ryzom/wiki/BuildForLinuxCmake

i build in a virtual machine or directly in server?

Better build it in the target server.
That server can be virtual or not, doesn't matter.
To move the binaries from one to another, you would have to build full static binaries, not so easy.

i'm trying right now... thanks for help me!