[patch] Workaround for ar and ld for Windows cmdline length restriction

[Simon Marlow]

Great.  If this patch is committed, we can close this ticket:

http://hackage.haskell.org/trac/hackage/ticket/19

Cheers,
	Simon

Esa Ilari Vuokko wrote:
> Hi
> 
> I have prepared a patch that works around Windows 32k command line
> length restriction when invoking ar and ld, this makes using
> ghc's split-objs possible in practice.
> 
> Tue May  9 04:15:32 FLE Daylight Time 2006  Esa Ilari Vuokko
> <ei at vuokko.info>
>   * Workaround for ar and ld for Windows cmdline length restriction
> 
> There is no guarantee that algorithm works, ideally I should
> cut the lines at 32k, but instead I just call ar/ld for each one
> hundred files.  Ld's case is a bit more complicated, with temp
> files.
> 
> Algorithms aren't perfect, but I think they fit practically all
> packages out there (who has path to object file longer than
> 320+ characters, and hundred more?)
> 
> Better solution would be to use ar's and ld's @file-functionality,
> but this isn't available in mingw's stable (or whatever) binutils
> yet, and of course builds for 6.4.x series will never have them, so
> it'd need ar/ld version checking which isn't totally trivial to add.
> 
> Best regards,
> --Esa
> 
> PS. Please CC me on replies as I am not subscribed.
> PSS. It seems to me that indentation in source has both tabs and
>   spaces.  That feels risky.
> 
> 
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