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[bug #23681] Function declarators with empty parentheses should not be u
From: |
Ludovic Courtès |
Subject: |
[bug #23681] Function declarators with empty parentheses should not be used |
Date: |
Mon, 23 Jun 2008 11:45:46 +0000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.12) Gecko/20080222 BonEcho/2.0.0.12 |
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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