On Tuesday 11 January 2005 07:18 am, Robert Duke wrote:
> Anshul -
> I would expect that it IS possible, and probably not that hard, to get amber
> installed with g77 on a digital/compaq/hp unix alpha box, but it may require
> some tweaking of the machine files, and there may be some system call issues
> (probably not, but it is a possibility). Unfortunately, I really can't help
> you with this one; you need support from someone else who has done either
> this specific system or who uses g77 on other systems and has access to this
> sort of system. I know folks love things like g77 because it is relatively
> portable and free; I personally don't use it at all because it is slow, and
> I do a lot of work trying to reduce the time it takes to do good quality MD
> simulations. SO it is time for someone else to respond!
> Regards - Bob
>
Well, I have no experience with g77 on an alpha not running either
linux or FreeBSD, but I would say the success may well depend on
the version of gcc/g77 installed. You should probably use the
very latest versions of the compilers, but, with alpha seemingly
on a path towad rapid extinction, there may not have been much
recent work by the gcc/g77 people on code generation for alphas.
It is pretty well known that older versions of gcc/g77 produced
very poor quality and very buggy code for the alpha. The Compaq
compilers will, almost for sure, do a lot better. I don't
remember the details, but I'm pretty sure you used to be able to
get linux version of the Compaq compilers for free if the use was
not for commercial purposes.
I gave up on my dual processor alpha when I realized that a $700
single processor Athlon box (that should give an indication of
when I sent it to the warehouse) would run rings around the alpha
using the gcc/g77 compilers.
Bud Dodson
> ----- Original Message -----
> From: <anshul.imtech.res.in>
> To: <amber.scripps.edu>
> Sent: Tuesday, January 11, 2005 10:17 AM
> Subject: Re: AMBER: Floating Exception and installation on Digital Unix.
>
>
> > Dear Bob Duke,
> > I dont have f90 compiler on my machine. Previously I installed amber-7 on
> > another unix machine (alpha) using the g-77 compiler and it is running
> > fine on that. So I tried to do the similar thing on this system. However,
> > today I came to know thta this system is DS 10 Compac unix machine.
> > CAnt we use the g-77 compiler on this to install Amber-7
> >
> > With best regards,
> > Anshul
> >
> >
> >> Anshul,
> >> Okay, I am not a roar expert and that is where the problem is. However,
> >> I
> >> note that you are using g77 on an alpha box with digital Unix. Now, to
> >> my
> >> knowledge, the correct machine file to use for uniprocessor build (what
> >> you
> >> want to do first for everything, and then perhaps do a parallel build for
> >> sander), is Machine.axp_f90 (ie., do a "ln -s Machines/Machine.axp_f90
> >> MACHINE" in the src dir, followed by the make). Do you have the f90
> >> compiler for digital Unix on the machine (or as part of the system
> >> software
> >> release)? This would probably give you better performance than using
> >> g77.
> >> The g77 file probably assumes one of the machines defined by setenv
> >> MACHINE
> >> at the top of Machines.g77, and your success on other platforms with this
> >> file MAY require tweaking. This (ie., using Machine.axp_f90) may well
> >> fix
> >> your build problems; perhaps someone who has actually built amber 7 on an
> >> alpha with digital unix can comment, though.
> >> Regards - Bob Duke
> >>
> >> ----- Original Message -----
> >> From: <anshul.imtech.res.in>
> >> To: <amber.scripps.edu>
> >> Sent: Sunday, January 09, 2005 10:32 PM
> >> Subject: AMBER: Floating Exception and installation on Digital Unix.
> >>
> >>
> >>> Hi there,
> >>> I mailed soem time back regarding the Error of floating exception. As
> >>> Bob
> >>> told me to recheck everthing so i thought of starting with the
> >>> installation. I tried to reinstall everything once again. Today I found
> >>> that it is not installing properly. As it does not end with a message
> >>> regarding successful installation. These are the final few lines which I
> >>> see on the terminal.
> >>> ---------------------------
> >>> _esp_.f:498:
> >>> 1,'THE POINT CHARGES',/)
> >>> ^
> >>> Extraneous comma in FORMAT statement at (^)
> >>> _esp_.f: In block-data unit `espblo':
> >>> _esp_.f:2298: warning:
> >>> COMMON /ESPC/ CC(MAXPR),CEN(MAXPR,3),IAM(MAXPR,2),IND(MAXPR),
> >>> ^
> >>> Initialization of large (834384-unit) aggregate area `espc' at (^) slow
> >>> and takes lots of memory during g77 compile
> >>> *** Exit 1
> >>> Stop.
> >>> *** Exit 1
> >>> Stop.
> >>> *** Exit 1
> >>> Stop.
> >>> ---------------------------
> >>>
> >>> Can anyone be of any help for this. I am installing amber 7 on digita
> >>> Unix
> >>> with alpha cpu.
> >>>
> >>>
> >>> With best regards,
> >>> Anshul
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--
M. L. Dodson bdodson.scms.utmb.edu
409-772-2178 FAX: 409-747-8608
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Received on Tue Jan 11 2005 - 15:53:00 PST
