[mvapich-discuss] Re: install mvapich when there are two gcc in the system

[Pavel Shamis (Pasha)]

zhangyigang wrote:
> Dear Pavel Shamis:
> Thank you so much for your response. I guess I have both openibd (not
> sure
> the name) and opensm running (I have followed closely the manual), but
> the
> port refuse to become active if I do not turn off/on the switch. I will
> have a look at the opensm log file and see what I can find there.
> I do not know what FAE means. I have asked the person who sold us the
> cluster, then he asked the person who sold him the card. Finally the
> person
> who sold the card asked someone from Mellanox in Beijing, China. Maybe
> they
> will give a solution, but for the moment not yet.
I will try to check who from Mellanox got the request.
> For the gcc, I installed them by configure and make. I am not sure if I
> should keep both gcc as I was told that the operating system red hat
> linux
> is compiled with the old gcc so that some libraries compiled with the old
> gcc can still work. For the new gcc, it may be hard to remove it because
> there is no uninstall and the files installed are all over many places.
> I have one more question. For installing mvapich-1.0, the
> make.mvapich.gen2
> asks the parameter IBHOME. 
If you will run /etc/infiniband/info script it will show you IB
installation prefix.
In old versions of OFED it was /usr/ofed by default and in new versions
(1.3 for example)
it was changed to /usr by default.
Anyway the /etc/infiniband/info will show you exact location

Regards,
Pasha