Re: Quote of the day: "matrix of pain"

[Daniel Kegel <dank at kegel dot com>]

Robert P. J. Day wrote:
> > http://kegel.com/crosstool/current/buildlogs/ was painful enough,
>
>   while we're on the topic, is there any value to reducing the size of
> that matrix by letting some combinations subsume others?  consider the
> three contiguous columns:
>
> 		gcc-3.3.5
> 	glibc-{2.1.3/2.2.5/2.3.2}
> 		binutils-2.15
> 		linux-2.4.26
>
>   so the only difference is in the version of glibc.  note how, as you
> go from left to right in terms of newer versions of glibc, you have
> more success.  in fact, the success in builds left to right is
> monotonically non-decreasing.
>
>   this suggests that it's more time-efficient to concentrate on the
> last of those three combinations at the expense of the first two.
> IOW, anything glibc-2.1.3 or glibc-2.2.5 can do (in that specific
> context), glibc-2.3.2 can do *at least* as well.
>
>   or, at the very least, perhaps some of the older combinations can be
> dropped as being, well, *too* old.

Hey, some projects need old stuff.   That's life.
- Dan

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