Installation problem with latest svn version

hello

i need a recent version of ROOT to use my program on my personnal computer, so I’ve tried the svn way of downloading an then i tried to compile it but it gave me a strange message

I’ve really no idea of what to do… Is it a problem with my complier…???
Thanks in advance
JB

Hi,

Please install the libext-dev package on your machine first.

Cheers, Bertrand.