Re: generic-x needs to require generic

[Lute Kamstra <Lute.Kamstra.lists@xs4all.nl>]

Lute Kamstra <Lute.Kamstra.lists@xs4all.nl> writes:

> Luc Teirlinck <teirllm@dms.auburn.edu> writes:
>
>> What is the purpose of the following change to generic-x, which breaks
>> bootstrapping:
>>
>> 	* generic-x.el: Don't prevent compilation.  Don't require generic.
>> 	Follow coding conventions.  Minor code cleanup.
>>
>> I am referring to the "Don't require generic." part.  Undoing that
>> part solves the following problem during bootstrapping:
>
> The function generic-make-keywords-list that is called in generic-x is
> defined in generic. So it should probably be autoloaded.
> Alternatively generic-x could (eval-when-compile (require 'generic))
> and (eval-when-compile ...) all calls to generic-make-keywords-list as
> well.
>
> I missed this because bootstrapping my working-tree worked just fine.
> I also did an update for another tree without the generic{,-x}.el
> patches and it bootstrapped fine.  A clean checkout fails to
> bootstraps however.
>
> This is quite strange.  I guess that for me the define-generic-mode
> calls in generic-x that precede the generic-make-keywords-list call
> autoload generic so that generic is loaded when the call to
> generic-make-keywords-list is compiled.  Why this doesn't happen for
> you of for a clean checkout beats me.
>
> I'll put (require 'generic) back in for now to enable bootstrapping.

I've investigated this some more and I'm a bit puzzled.  Maybe someone
can help me.

When I remove the (require 'generic) from lisp/generic-x.el and do a
"make maintainer-clean", "./configure", and "make bootstrap", I see:

,----
| [...]
| 
| Generating autoloads for generic.el...
| Generating autoloads for generic.el...done
| 
| [...]
| 
| Compiling /soft/tmp/emacs/lisp/./generic-x.el
| 
| In toplevel form:
| generic-x.el:160:22:Warning: reference to free variable
|     `apache-conf-generic-mode'
| generic-x.el:177:22:Warning: reference to free variable
|     `apache-log-generic-mode'
| generic-x.el:191:22:Warning: reference to free variable `samba-generic-mode'
| generic-x.el:207:22:Warning: reference to free variable `fvwm-generic-mode'
| generic-x.el:233:22:Warning: reference to free variable
|     `x-resource-generic-mode'
| generic-x.el:244:22:Warning: reference to free variable `hosts-generic-mode'
| generic-x.el:255:22:Warning: reference to free variable `inf-generic-mode'
| generic-x.el:267:22:Warning: reference to free variable `ini-generic-mode'
| generic-x.el:287:22:Warning: reference to free variable `reg-generic-mode'
| generic-x.el:303:22:Warning: reference to free variable `bat-generic-mode'
| generic-x.el:444:22:Warning: reference to free variable
|     `mailagent-rules-generic-mode'
| generic-x.el:461:22:Warning: reference to free variable
|     `prototype-generic-mode'
| generic-x.el:484:22:Warning: reference to free variable `pkginfo-generic-mode'
| generic-x.el:496:22:Warning: reference to free variable
|     `javascript-generic-mode'
| generic-x.el:574:22:Warning: reference to free variable `vrml-generic-mode'
| generic-x.el:628:22:Warning: reference to free variable
|     `java-manifest-generic-mode'
| generic-x.el:648:22:Warning: reference to free variable
|     `java-properties-generic-mode'
| generic-x.el:679:22:Warning: reference to free variable `alias-generic-mode'
| generic-x.el:767:8:Error: Symbol's function definition is void: generic-make-keywords-list
| make[1]: *** [compile] Error 1
| make[1]: Leaving directory `/soft/tmp/emacs/lisp'
| make: *** [bootstrap-build] Error 2
`----

The warnings indicate that the define-generic-mode macro is not
defined when generic-x.el is compiled.  define-generic-mode is an
autoloaded macro in generic.el and it seems that autoloads for
generic.el are created.  So why isn't generic loaded when generic.el
is compiled?

What I find puzzling as well is that when I do a second "make
bootstrap" after the first failed, things just work fine:

,----
| [...]
| 
| Compiling /soft/tmp/emacs/lisp/./generic-x.el
| 
| In end of data:
| generic-x.el:1821:1:Warning: the following functions are not known to be
|     defined: w32-shell-name, comint-mode, comint-exec
| Wrote /soft/tmp/emacs/lisp/generic-x.elc
| 
| [...]
`----


Lute.