[gmx-users] gromacs on IBM Power 5 Linux Machine: Preprocessor problem

[Monika Sharma]

I am using Gromacs3.3 version, and I was trying grompp for energy 
minimization, which is not working. Even the mdrun didnt work. The same 
file seems to work properly on simple Fedora linux PC, but not on IBM 
Power linux. Dont know then what the problem is??

Mark Abraham wrote:

> Monika Sharma wrote:
>
>> Dear All,
>> We have this IBM POWER5 machine with Linux SLES. The FFTW and GROMACS
>> are compiling without any errors (compiler is gcc), but when we are
>> trying to run a job on the machine, its exiting saying "illegal
>> instruction". Looking at the things, it seemed that the cpp it generated
>> is just a dummy, and cannot execute.
>
>
> cpp is not generated by the above process. It needs to be already 
> present on your machine.
>
> You'd also be well advised to tell us *which* gromacs program you're 
> trying to run when you get your "illegal instruction", because we 
> can't read minds.
>
>> I even tried using as
>> make CFLAGS='-mcpu=power5  -mtune=power5' for fftw and gromacs also, but
>> it doesnt seems to work.
>
>
> Mark
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