[OMPI devel] Build mca_sysinfo_linux module when /proc/cpuinfo doesn't exist
Hello there,
I'm using OpenMPI for educational reasons. It works pretty fine under
GNU/Linux. I have both compiled it and downloaded it from the package
management system with no problems.
But I have trying to use it in other Unix systems as well. In these
systems /proc (NetBSD for instance) is by default unmounted, so
./configure script cannot stat /proc/cpuinfo (although it does exist in
NetBSD if you manually mount /proc). In the case it cannot stat
/proc/cpuinfo, it just silently ignores compilation of
mca_sysinfo_linux.{so,la}.
Is this behaviour correct? Or it would be be a better idea that
configure script fail with a "please check /proc/cpuinfo or specify
--dont-build-sysinfo-linux"-like message?
Thank you very much.
--
Silas Silva
Re: [OMPI devel] Build mca_sysinfo_linux module when /proc/cpuinfo doesn't exist
Hi Paul,
On Thu, Mar 24, 2011 at 06:52:23PM -0700, Paul H. Hargrove wrote:
> Silas,
>
> FYI: openmpi-1.4.1 is in the package repo for NetBSD 5.1. So, you
> might not need to build from scratch at all, depending on your
> desired use.
I'm actually not building it from scratch :-) I'm using the pkgsrc
package manager (www.pkgsrc.org) that is source based and create binary
packages in the local computer. The problem is that the contents of the
package differs in the case when /proc is mounted...
> Jeff,
>
> When available (remember that unlike Linux /proc might not be
> mounted by default) the /proc/cpuinfo and /proc/meminfo on NetBSD
> 5.1 are (nearly?) identical to the Linux ones. See below for an
> example.
>
> To "prefetch" the next logical question:
> On a FreeBSD 8.1 system I find that /proc exists but does not
> contain cpuinfo or meminfo
> On a OpenBSD 4.8 system I find that there is no /proc
I was just pasting NetBSD's /proc/{cpuinfo,meminfo}. Thanks for doing
that :-) But yeah, other systems might not have this. I know working on
portability can be painful. That is why most projects support GNU/Linux
only and let other systems developers port their application. Anyway,
can /proc be unmounted in GNU/Linux somehow?
Thank you very much.
--
Silas Silva
Re: [OMPI devel] Build mca_sysinfo_linux module when /proc/cpuinfo doesn't exist
On Thu, Mar 24, 2011 at 08:03:25PM -0600, Ralph Castain wrote: > Why would you want to do that, if it even were possible (which I'm > pretty sure it isn't)? I'm not a GNU/Linux user, so I don't know whether or not /proc is always mounted... This was just a doubt. -- Silas Silva
