[igraph] [R] Compilation error during package installation

[Riccardo Tasso]

Hi,
   I'm trying to make some social network analyis (in particular 
community detection) on a negative (and positive) weighted network and I 
decided to use R with igraph.
I discovered a recently pubblicated paper which describes the algorithm 
I need (http://arxiv.org/abs/0811.2329) and the author sent me a 
modified version of igraph 0.5 source code implementing it. He also sent 
me a compiled version for windows.
The windows version works great but I'd like to use GNU/Linux Ubuntu 
8.10, so I tried to compile by myself the source code after installing 
the R packages. Here starts my problem because, as I found at the 
discussion https://stat.ethz.ch/pipermail/r-help/2008-June/166052.html , 
the igraph 0.5 version have compile errors with the gcc 3.4 version 
which I'm using.
I red that version 0.5.1 doesn't have this problem but I need that 
special 0.5 version.
What do you suggest me to do considering I'm not very able in C/C++ coding?
Thank you,
   Riccardo