Hmm, maybe, but most places that I can think of would want either
solib, or source, but not both. --with-sysroot just sets solib, also.
I have no idea what it ought to do with debug...
Now what would be really nice would be a manual chapter referencing all
of these.
(although an immediate source-absolute-prefix shouldn't hurt).
BTW, wasn't there a mechanism for editing/replacing part of the source
prefix added, or did that get lost?
Now that sounds like a great idea. I can't see it in the source,
though, and it doesn't ring a bell.