drain <aeuster@gmail.com> writes:

> After I enter C-h f then forward-word, I get this message:
>
> forward-word is an interactive built-in function in `syntax.c'.
>
> I click on 'syntax.c' and Emacs tells me: "the C source file syntax.c is not
> available".
>
> Where can I find this file?

In the Emacs source tree.

> Where is it most likely to be in GNU / Linux?

It's most likely to be unavailable in most GNU/Linux
installations.

> (my distro is Ubuntu 11.10)

Ubuntu, like Debian, guesses you won't need those files.  You can
get the source release from GNU.

-- 
Carl Lei (XeCycle)
Department of Physics, Shanghai Jiao Tong University
OpenPGP public key: 7795E591
Fingerprint: 1FB6 7F1F D45D F681 C845 27F7 8D71 8EC4 7795 E591