Re: [PATCH] Add ".guile.sls" and ".sls" to the default %load-extensions

[Andreas Rottmann <a.rottmann@gmx.at>]

ludo@gnu.org (Ludovic Courtès) writes:

> Hi,
>
> Mark H Weaver <mhw@netris.org> skribis:
>
>> Any objections to adding ".guile.sls" and ".sls" to Guile's default
>> %load-extensions?
>
> OK for .sls, but why .guile.sls?
>
This is used for compatibility libraries, for instance:

   % ls spells/filesys/
   compat.guile.sls   compat.larceny.sls  compat.mzscheme.sls
   compat.ikarus.sls  compat.mosh.sls     compat.ypsilon.sls

Only guile will have .guile.sls in its %load-extensions, so it will find
the correct library, in this case corresponding to the library name
`(spells filesys compat)'.

Other R6RS implementations, if the adhere to this convention, will only
consider "their" specific file, as they'd only look for
spells/filesys/compat.sls and
spells/filesys/compat.<IMPLEMENTATION>.sls.  If there's a portable
implementation of that library, it will be under
spells/filesys/compat.sls, and be used (only) if there's no
implementation-specific file. So it's important that the ".guile.sls"
extension is considered *before* ".sls".

For performance reasons, it *might* make sense to not enable this
behavior by default, but provide a command-line switch; however,
enabling this behavior is *already* possible using command-line switches
("-x .guile.sls -x .sls"), so I don't know...

Regards, Rotty
-- 
Andreas Rottmann -- <http://rotty.yi.org/>