Re: c++/6531: attribute error

Re: c++/6531: attribute error

[Klaus Pedersen]

The following reply was made to PR c++/6531; it has been noted by GNATS.

From: Klaus Pedersen <klaus.kruse.pedersen@mail.tele.dk>
To: gcc-gnats@gcc.gnu.org,  gcc-bugs@gcc.gnu.org
Cc:  
Subject: Re: c++/6531: attribute error
Date: Thu, 12 Sep 2002 01:08:42 +0200

 The problem with attribute((alias())), is still present in gcc-3.2, but it
 isn't limited to h8300 or c++. It can be reproduced on arm-elf targets and
 with plain c.
 
 Without a fix good stuff like eCos can't compile, and code like
 
 /* HEADER FILE */
 extern int getcx(int);
 
 /* IMPLEMENTATION */
 int __getcx(int) {return 1;}
 
 int getcx(int)
     __attribute__((weak))
     __attribute__((alias("__getcx")));
 
 
 Will produces this error :
  `int getcx(int)' defined both normally and as an alias
 
 Are there any plans to fix the problem? and what is the problem with the 
 patch in:
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6531
 
 
 BR, Klaus
 

Re: c++/6531: attribute error

[gdr]

Synopsis: attribute error

State-Changed-From-To: open->closed
State-Changed-By: gdr
State-Changed-When: Fri Oct 11 12:40:23 2002
State-Changed-Why:
    Suggested patch is exactly what Jim checked in here:
    http://gcc.gnu.org/ml/gcc-patches/2002-10/msg00656.html

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6531

c++/6531: attribute error

[qzb04471]

>Number:         6531
>Category:       c++
>Synopsis:       attribute error
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Wed May 01 06:36:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     qzb04471@nifty.ne.jp
>Release:        h8300-elf-g++ (GCC) 3.1 20020429 (prerelease)
>Organization:
>Environment:
RedHat Linux 6.2
>Description:
weaktest.cpp:7: `void bar()' defined both normally and as an alias
weaktest.cpp:7: weak declaration of `void bar()' must precede definition

weaktest.cpp
extern "C" void bar( );

extern "C" void foo( )
{
}

extern "C" void bar( ) __attribute__ ((weak)) __attribute__ ((alias ("foo")));
>How-To-Repeat:

>Fix:
*** decl.c.old  Wed May  1 22:26:14 2002
--- decl.c      Wed May  1 22:27:53 2002
***************
*** 3505,3511 ****
       except for any that we copy here from the old type.  */
    DECL_ATTRIBUTES (newdecl)
      = (*targetm.merge_decl_attributes) (olddecl, newdecl);
-   decl_attributes (&newdecl, DECL_ATTRIBUTES (newdecl), 0);
  
    if (TREE_CODE (newdecl) == TEMPLATE_DECL)
      {
--- 3505,3510 ----
>Release-Note:
>Audit-Trail:
>Unformatted: