Is the build/host/target stuff fully explained anywhere?

standards.texi talks about using host/target, autoconf.texi talks just a
bit about these items.  I remember the flurry of email that recently
happened on this matter, but I sure didn't get a clear understanding of
any resolution.

For example, years ago I added the ability to compile the NTP software
for vxworks (with a bunch of help from a vxworks person).  At that time,
for whatever reason, I tested the various AC_CANONICAL_* macros and
decided I needed to use AC_CANONICAL_SYSTEM and compare $host with
$target in configure.in .

Should I change to AC_CACNONICAL_HOST and compare $build with $host, and
tell the vxworks folks to incant:

     configure --host=arch-wrs-vxworks

instead of

     configure --target=arch-wrs-vxworks

Also, I bet it matters exactly what version of autoconf I'm using, huh?

Harlan

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