Hi all,
please take a look at the following short elisp-example:
(eval-when-compile
(require 'cl))
(defcustom ecb-wget-setup (cons (if (fboundp 'executable-find)
(executable-find "wget")
"wget")
(case system-type
(cygwin32 'cygwin)
(windows-nt (if (getenv "CYGWIN")
'cygwin
'windows))
(otherwise 'other)))
"*Configuration for the wget-utility."
:group 'ecb-download
:type '(cons (file :tag "wget binary" :value "wget")
(choice :tag "Path type" :menu-tag "Path type"
(const :tag "Windows" :value windows)
(const :tag "Cygwin" :value cygwin)
(const :tag "Other" :value other))))
(defvar ecb-wget-setup-defvar (cons (if (fboundp 'executable-find)
(executable-find "wget")
"wget")
(case system-type
(cygwin32 'cygwin)
(windows-nt (if (getenv "CYGWIN")
'cygwin
'windows))
(otherwise 'other)))
"Same as `ecb-wget-setup' but defined with `defvar'.")
(provide 'defcustom-test)
IMO this should load 'cl when byte-compiling and so resolving the
`case'- macro in the initial-value of the defcustom?!
But appearantly it doesn't:
My guess is that cl gets loaded when i byte-compile this example-code,
but the code in defcustom somehow does not get byte-compiled.
If you load the resulting elc file in your editor (i.e.
C-x C-f defcustom-test.elc), you'll see that the defcustom statement
for ecb-wget-setup still contains "(case ...".
But if you replace the defcustom with defvar, the `case' will
be replaced by some byte code (see `ecb-wget-setup-defvar').
The coding conventions of Emacs tell me that i only should load
cl at byte-compile-time. Well, i did this - see code above.
But cause of this defcustom-behavior the resulting elc-file is not
loadable - always an error like "...case is not a defined function..."
Is this a bug or how i can avoid this?
Thanks for your help,
Klaus
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