Achim Gratz <strom...@nexgo.de> writes:
> Eric Schulte writes:
>> See http://orgmode.org/manual/Languages.html for the documentation on
>> how to activate and disable org-babel languages.
>
> That actually produces the error:
>
> File mode specification error: (void-variable org-babel-tangle-lang-exts)
>
> as the OP has found out (and I can reproduce it).
>
Using this method of requiring languages,
;; emacs-lisp
(org-babel-do-load-languages
'org-babel-load-languages
'((perl . t)))
Works for me without issue when called from a fresh emacs (-Q). This is
the recommended way of adding support for a new language and should work
for the OP.
>
> The reason is that none of the ob-<lang>.el files do a (require
> ob-tangle), but try to change a defcustom in ob.tangle.el that is only
> declared, but not yet available at the time.
The two fixes seem to be either to either (1) add (require 'ob-tangle)
to all current and new language specific files, or (2) merge ob-tangle
into ob.el, so that they are both loaded by (require 'ob). It is
unfortunate that because of the recursive require there is no way to
separate a single require'd entity across multiple files.
Option (2) seems most clean to me. Unless anyone has a better idea I'll
make this change.
Best,
--
Eric Schulte
http://cs.unm.edu/~eschulte
