On Tuesday, 18 June 2013 06:39:20 UTC+2, Volker Braun wrote:
>
> I've built Sage on Cygwin today in a 4GB i386 virtual machine. The plus 
> side: It builds without any major hitches. Jean-Pierre Flori and others did 
> a lot of work to clean this up.


what is the Windows version you are using? Is it a 32-bit? I've had a lot 
of trouble with this one, and much less with a 64-bit (I'm not talking 
about about 32 vs 64-bit Cygwin).
It probably has to do with the amount of space one has to allocate for all 
the dlls.
  

>
> But I'm still unable to consistently get the documentation to build, I 
> often get the dreaded "address space needed by <some Sage dll> is already 
> occupied" error which is due to the fundamental limitation of the fork 
> emulation. In fact, sometimes the documentation builds successfully and 
> sometimes it does not, depending on process space memory layout I guess. 
> This is really random, and I can't get it to consistently work with any 
> amount of rebasing. I've seen instances where docbuild works once and then 
> fails immediately afterwards when I repeat it, without me having changed 
> anything between the runs.
>
> This is not just about the documentation, this step is just particularly 
> critical since everything will be imported during the docbuild step. So if 
> any shared library has a problem, it will likely be encountered during the 
> docbuild. Since Sage is probably the largest number of shared libraries in 
> Cygwin ever, it is conceivable that this is a fundamental limitation (at 
> least unless 64-bit cygwin works). Any thoughts?
>

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