[Nek5000-users] new build system

[nek5000-users at lists.mcs.anl.gov]

Well the GNU make utility allows you to compile using multiple threads
(make -jNTHREADS).

Checking array bounds at runtime is a compiler feature which
we cannot use because of things like:

subroutine foo(a,n)
real a(1)

do i = 1,n
  a(i)
enddo

The compiler would think a of size 1 although we're passing in
with the correct size n.

However we plan to introduce a debug preprocessor symbol
making the solver more verbose. 

Stefan


On May 19, 2010, at 2:53 PM, nek5000-users at lists.mcs.anl.gov wrote:

> Hello all,
> 
> No major complaints with the compile procedure.  For one thing, I must
> say I am very impressed by the speed at which the code compiles!  Very
> surprising considering the capabilities of NEK.  
> 
> One suggestion would be to have a way to build testing and production
> versions.  The testing version would be compiled with all the debug
> switches on (i.e. check bounds etc.) and would be used when users are
> making changes in the *.usr file and debugging.  The production version
> would use compile switches that the development team finds to be best
> for speed on particular platforms.
> 
> Cheers,
> Frank
> 
> 
> On Wed, 2010-05-19 at 11:48 +0200, nek5000-users at lists.mcs.anl.gov
> wrote:
>> Dear Nek users,
>> 
>> we have an ongoing discussion about a new build system for Nek.
>> 
>> What do you think about the current build system?
>> How easy is it to compile Nek?
>> What can be improved / What's missing?
>> 
>> One major complain was that the current build system does not follow the standard procedure of configure; make; make install.
>> 
>> We may want to follow the standard more closely. One idea would be to have a nekconfigure.in file to specify the compiler, flags, etc. and you need to run nekconfigure to create a makefile for your environment.  After that you can use the classical GNU make utility to compile the code.
>> 
>> Your feedback is welcome!
>> 
>> 
>> Cheers,
>> Stefan
>> 
>> 
>> 
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> -- 
> Frank Herbert Muldoon, Ph.D. Mechanical Engineering
> Technische Universität Wien (Technical University of Vienna)
> Inst. f. Strömungsmechanik und Wärmeübertragung (Institute of Fluid
> Mechanics and Heat Transfer)
> Resselgasse 3
> 1040 Wien
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