[gmx-developers] parallel make problems

[Mark Abraham]

On Fri, Apr 5, 2013 at 1:08 PM, Rossen Apostolov <rossen at kth.se> wrote:
> Hi Erik,
>
> Are you compiling fftw with the build, i.e. using -DGMX_BUILD_OWN_FFTW ?

Yeah, that issue is still there. The dependencies on the internal FFTW
do not cooperate with parallel make.

Mark

>
> Cheers,
> Rossen
>
>
> On 4/5/13 11:55 AM, Erik Marklund wrote:
>
> Hi,
>
> Building gromacs 4.6.1 failed whenever I issued parallel make, i.e. make -j.
> I reported this to the cluster admins since I had never seen such behaviour
> before from gromacs' side, and here's their reply. I can't tell whether
> gromacs is at fault or the cluster.
>
> Erik
>
> Begin forwarded message:
>
>  Hi,
>
> I was compiling gromacs on tintin's login node the other day and it
>   seems that parallel make, i.e. make -j, doesn't work on tintin. I
>   got linker errors that never showed up when make was run serially.
>   I've never encountered such behaviour before.
>
>
> Without any more information (or being able to look for actual files right
> now), I'd guess this is a problem with the makefiles rather than the actual
> make. It seems somewhat unexpected that CMake would create makefiles that
> aren't safe for parallel building, but it does seem the most likely culprit
> (assuming it doesn't let developers add rules directly to the makefile to
> work around problems, I don't remember if that's possible).
>
> That you only see the problem on tintin can likely be explained by timing or
> other non deterministic factors.
>
>
>
>
>
>
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