[gecode-users] compiler memory problem

[Patrik Haslum]

Hi,

I've written a custom propagator. It is based on one of the existing 
templates, Gecode:BinaryPropagator, with an array of boolean views as 
the template argument. It works, but the compiler (g++ 4.1.2) is having 
serious trouble with the code: if I try to use any compiler optimisation 
(that is, anything other than -O0), the compiler eats up all memory 
(including swap) and never finishes. I know that using many and/or 
nested templates tends to increase compiler memory use, but this case is 
worse than anything I've encountered before. Is this a known problem? 
(perhaps fixed in some more recent g++ compiler). Is there some way to 
work around it? (other than disabling compiler optimisation, because 
that *really* slows down the solver). The only other option I can think 
of is to write the propagator from scratch, without relying on any base 
template.

Attached is a simplified version of the code (it doesn't contain any 
actual functionality, just the minimum that is needed to cause the 
compiler to behave this way).

Thanks,
			/P at trik
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