>>a) remembers every option used to build a package (yesterday,last
>>month, last year, whenever) and/or
Because the configure script has no way of knowing but guessing, so why
bother to do the guessing since most (99.99%) of the people would check for
ChangeLog and new options and run the configure script anyway. That's why
you are on your own to save the configure options somewhere.
>>intuitively knows all of the correct configuration settings for
>>every package they upgrade.
In the real world, there is NO SUCH THING as upgrading. It basically
removes/replaces your old files with the new ones.
Why is there an upgrade in the first place? Simply because version has
changed, things have changed, directory paths might have changed, new
features might have added. If you don't remember your previous configure
options, just start it over and treat this as a fresh install instead of an
upgrade, which there is no such thing anyway, then enable/disable whatever
options to your liking.
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