Re: c/5582: warn about using the extension "int x=x;"

Re: c/5582: warn about using the extension "int x=x;"

[bangerth]

Old Synopsis: a warning to implement
New Synopsis: warn about using the extension "int x=x;"

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Tue Jan  7 17:12:05 2003
State-Changed-Why:
    The use of
      int x = x;
    is a gcc extension, but I could indeed not find a place in
    the manual that talks about a warning option that gives
    a message when this extension is used.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5582

Re: c/5582: warn about using the extension "int x=x;"

[Wolfgang Bangerth]

The following reply was made to PR c/5582; it has been noted by GNATS.

From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: Volker Reichelt <reichelt@igpm.rwth-aachen.de>
Cc: pcarlini@unitus.it, <aoliva@redhat.com>, <dewar@gnat.com>,
   <gcc-gnats@gcc.gnu.org>, <coola@ngs.ru>, <gcc-bugs@gcc.gnu.org>,
   <bangerth@dealii.org>
Subject: Re: c/5582: warn about using the extension "int x=x;"
Date: Wed, 8 Jan 2003 08:24:46 -0600 (CST)

 > You get no error/warning, if you try to compile the code inside a
 > function, ie. "void foo() { int x=x; }".
 > But that's not a gcc extension, just a missing warning about the use of
 > an uninitialized variable.
 
 Sure. IIRC the extension is that this reliably calms down warnings about 
 uninitialized variables.
 
 W.
 
 -------------------------------------------------------------------------
 Wolfgang Bangerth             email:            bangerth@ticam.utexas.edu
                               www: http://www.ticam.utexas.edu/~bangerth/
 
 

Re: c/5582: warn about using the extension "int x=x;"

[Volker Reichelt]

The following reply was made to PR c/5582; it has been noted by GNATS.

From: Volker Reichelt <reichelt@igpm.rwth-aachen.de>
To: pcarlini@unitus.it, aoliva@redhat.com, dewar@gnat.com,
        gcc-gnats@gcc.gnu.org, coola@ngs.ru, gcc-bugs@gcc.gnu.org,
        bangerth@dealii.org
Cc:  
Subject: Re: c/5582: warn about using the extension "int x=x;"
Date: Wed, 8 Jan 2003 12:50:22 +0100

 Just for the sake of completeness:
 gcc issues an error if you just try to compile "int x=x;".
 
 You get no error/warning, if you try to compile the code inside a
 function, ie. "void foo() { int x=x; }".
 But that's not a gcc extension, just a missing warning about the use of
 an uninitialized variable.
 
 Regards,
 Volker
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5582