> If an update to new source code, that would compile just fine in a clean
> checkout, breaks the incremental build, the build system is errornuous.
I would like to agree with you, but this constraint is, in general,
incompatible with incremental building, which is too good a benefit to
throw away.
> Anything that seeks to fix such bugs by user intervention is not a real
> solution. At least that is my opinion. I just don't know how that could be
> solved nicely in Make.
Quite. In the mean time, we get as close to this ideal as possible
and we have clean-rules to purge selective chunks of what incremental
building normally caches for us, to deal with the messy cases.
If people *routinely need* to use any clean rule in the course of
their normal work-flows, I consider the build system inadequate: but
I'll still include clean rules for use when the exceptional situations
do come up (and as an aid to debugging).
Eddy.
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