> I have no beef with deprecating it.
What about the following route? For guile, I would add support for
`guile-config`, using the following algorithm (with item 1 already
implemented).
1. Search for a guile `.pc` file, checking whether version 1.8.x,
2.2.x, or 2.0.x is present (in this order).
If a specific guile version is needed, set the `GUILE_FLAVOR`
environment variable, for example
./configure GUILE_FLAVOR="guile-2.2"
(possible values for `GUILE_FLAVOR` are `guile-1.8`, `guile-2.0`,
`guile-2.2`, and `guile-3.0`). If you want to use guile-3.0, you
currently *must* use `GUILE_FLAVOR`.
2. If nothing is found, try to execute `guile-config` (which must be
in the path) to get the necessary compilation and linking flags.
3. Abort if this fails, too.
Werner
