Re: [igraph] help installing igraph

[Tamas Nepusz]

Dear Hernan,

> I'm trying to install the igraph python module on a linux machine  
> and, when running "python setup.py build", I get the following error:
> [...]
> Anybody known what the problem is? Is -ligraph an appropriate option?
Yes, that's an appropriate option, it instructs the compiler to try to  
link with the igraph dynamic library (libigraph.so on Linux systems).  
So first you'll have to figure out where it is. It should be created  
when you compile and install the C source code using the usual  
procedure:

./configure
make
make install   (of course this one has to be run as root if you  
install it to /usr or /usr/local)

The Python setup script tries to figure out the path to libigraph.so  
by issuing the following command on the command line:

pkg-config igraph --libs

When it fails, the setup script falls back to the default system  
directories (/usr/lib and /usr/local/lib). If your libigraph.so is at  
a different place, edit the variable called  
LIBIGRAPH_FALLBACK_LIBRARY_DIRS in setup.py appropriately.

By the way, there are precompiled binary packages for Debian and  
Fedora, so if you are using one of these distributions, you don't have  
to compile igraph manually.

Regards,
--
Tamas