[bug #23681] Function declarators with empty parentheses should not be used

[bug #23681] Function declarators with empty parentheses should not be used

[Ludovic Courtès]

URL:
  <http://savannah.gnu.org/bugs/?23681>

                 Summary: Function declarators with empty parentheses should
not be used
                 Project: Guile
            Submitted by: civodul
            Submitted on: Monday 06/23/2008 at 11:45
                Category: None
                Severity: 4 - Important
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

    _______________________________________________________

Details:

Hello,

In Guile 1.8 and earlier, `scm_c_define_gsubr ()', `gh_new_procedure ()' and
related functions take a function pointer as an argument, where the function
type uses empty parentheses (which means that the function can have any
prototype, provided the return type matches).

Function declarators with empty parentheses are not available in C++ [0] and
are an obsolescent feature as of C99 (Section 6.11.6); it also break when
GCC's `-Wstrict-prototypes' option is used [1].  

Therefore, Guile's API should eventually (e.g., in the next major release) be
changed to use a different function pointer type.  Hopefully, the change can
be made almost transparent for applications that use `guile-snarf'.

Thanks,
Ludovic.

[0] http://article.gmane.org/gmane.lisp.guile.user/6613
[1] http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/2118




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[bug #23681] Function declarators with empty parentheses should not be used

[Ludovic Courtès]

Follow-up Comment #1, bug #23681 (project guile):

This also breaks C++:
http://lists.gnu.org/archive/html/guile-user/2010-07/msg00084.html .

Ludo’.

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[bug #23681] Function declarators with empty parentheses should not be used

[Ludovic Courtès]

Update of bug #23681 (project guile):

             Assigned to:                    None => civodul                


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[bug #23681] Function declarators with empty parentheses should not be used

[Ludovic Courtès]

Update of bug #23681 (project guile):

                  Status:                    None => Fixed                  
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #2:

Fix in commit be90d0b6f9e79bc882b2289bf0a5ea1b3c082b3c.

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