Leif Neland wrote:
>
> > The reason for this is that some gcc optimizations stages takes
> > exponentially more memory when compiling big functions.
> > bison produces one big function for the grammar parsing and its
> > this that takes a long time to compile; To compile sql_yacc.cc quickly
> > on Intel, you nead at least 160M of free ram. On a PentiumII 400mz with 256M
> > ram, it takes 11 seconds to compile sql_yacc.o. Having to use swap
> > can easily make things 1000 times slower
> >
>
> Is amount of ram available (portably) to configure?
> So configure could decide to use --low-memory by itself? Allowing
> overrides, naturally.
>
> Leif
>
There is actually a method to portably guess how much RAM your have available
from configure -- just write a small C program that will keep malloc()-ing until
it gets an error, but I do not think it is worth the effort.
--
Sasha Pachev
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