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Re: (toplevel) Fix dramatic breakage for ordinary crosses (related to program_transform_name)

> Why not?  It's just a cache, after all!  Worst case, when you
> reconfigure, you get to rerun some tests.  So what?

Worst case is config.cache gets corrupt values, and the build breaks.
I agree it's rare.  If we understand the risk, and collectively decide
to live with it until an actual problem happens, I'm OK with that.

> > But it would be nice if autoconf managed this problem for us.
> 
> It can't.  Consider that the config.cache file specified in the
> command line may be in a directory that is not writable,

That's a different type of problem.  Does autoconf allow for failure
to write to config.cache?
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