[Bug c/21759] New: feature request: implement warning for codes at the intersection of C and C++

[Bug c/21759] New: feature request: implement warning for codes at the intersection of C and C++

[gdr at gcc dot gnu dot org]

Implement a -W switch that warn for most common cases of valid C codes that
are invalid in C++, or are valid in C++ but with a slightly different menaing.

-- 
           Summary: feature request: implement warning for codes at the
                    intersection of C and C++
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gdr at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: Plateform independent


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
   GCC host triplet|Plateform independent       |
           Keywords|                            |diagnostic
            Summary|feature request: implement  |Implement warning for codes
                   |warning for codes at the    |at the intersection of C and
                   |intersection of C and C++   |C++


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[gdr at gcc dot gnu dot org]

------- Additional Comments From gdr at gcc dot gnu dot org  2005-06-09 15:05 -------
working on it.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |gdr at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-06-09 15:05:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-06-09 22:22 -------
Subject: Bug 21759

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	gdr@gcc.gnu.org	2005-06-09 22:21:48

Modified files:
	gcc            : ChangeLog c-typeck.c c.opt 
	gcc/doc        : invoke.texi 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg: Wcxx-compat-1.c 

Log message:
	PR c/21759
	* c.opt (Wc++-compat): New.
	* doc/invoke.texi (-Wc++-compat): Document.
	* c-typeck.c (convert_for_assignment): Check for implicit
	conversion void* -> T*.
	testsuite/
	* gcc.dg/Wcxx-compat-1.c: New.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9110&r2=2.9111
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-typeck.c.diff?cvsroot=gcc&r1=1.451&r2=1.452
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c.opt.diff?cvsroot=gcc&r1=1.45&r2=1.46
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/doc/invoke.texi.diff?cvsroot=gcc&r1=1.632&r2=1.633
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5619&r2=1.5620
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/Wcxx-compat-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-18 01:55 -------
Isn't this fixed?

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[gdr at integrable-solutions dot net]

------- Additional Comments From gdr at integrable-solutions dot net  2005-09-18 02:52 -------
Subject: Re:  Implement warning for codes at the intersection of C and C++

"pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> writes:

| Isn't this fixed?

No.  There are still other areas not covered.  
I'll close the PR when I consider it fixed.  Thanks.

-- Gaby


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[manu at gcc dot gnu dot org]

------- Comment #11 from manu at gcc dot gnu dot org  2010-07-03 20:08 -------
Isn't this a duplicate of PR37041? That PR is more complete than this one.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[ghazi at gcc dot gnu dot org]

------- Comment #10 from ghazi at gcc dot gnu dot org  2009-09-07 00:59 -------
(In reply to comment #9)
> See this note for some details on the semantics of this warning,
> with respect to keywords:
> http://gcc.gnu.org/ml/gcc-patches/2008-07/msg00808.html

What's the status of this PR?  Are there any issues remaining for completing
-Wc++-compat?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[tromey at gcc dot gnu dot org]

------- Comment #9 from tromey at gcc dot gnu dot org  2008-08-07 20:28 -------
See this note for some details on the semantics of this warning,
with respect to keywords:

http://gcc.gnu.org/ml/gcc-patches/2008-07/msg00808.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2008-07-06 22:26 -------
>Not sure what the exact error message was.

Easy, the decls were not defined :).  Basically the enums get the scope of the
struct they are defined in for C++ but in C, they get the global scope.  A
warning for this is not that useful really if we are going to move to C++ where
we want them in the scope of the struct rather than the global scope.

-- Pinski


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[ghazi at gcc dot gnu dot org]

------- Comment #7 from ghazi at gcc dot gnu dot org  2008-07-06 22:22 -------
Another C/C++ conflict (?) that could be possibly implemented in this warning
feature, enum declaration scoping:

http://gcc.gnu.org/ml/gcc-patches/2008-07/msg00470.html

Not sure what the exact error message was.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[ghazi at gcc dot gnu dot org]

------- Comment #6 from ghazi at gcc dot gnu dot org  2008-06-19 08:03 -------
Manuel - "quick and dirty" list got posted here:
http://gcc.gnu.org/ml/gcc/2008-06/msg00412.html

I think #3 & #4 are implemented, #1 & #2 remain.  There might be others of
course.


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ghazi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ghazi at gcc dot gnu dot org
   Last reconfirmed|2005-12-18 20:03:32         |2008-06-19 08:03:11
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759

[Bug c/21759] Implement warning for codes at the intersection of C and C++

[manu at gcc dot gnu dot org]

------- Comment #5 from manu at gcc dot gnu dot org  2007-01-26 16:08 -------
Gabriel, if you could do a quick and dirty list of what remains to be done,
perhaps some potential contributor would try to implement it as an entry point
to GCC development.


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manu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21759