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optimization/10208: Empty structs removed by gcc but not by g++

From: lex dot augusteijn at philips dot com
To: gcc-gnats at gcc dot gnu dot org
Date: 25 Mar 2003 13:09:58 -0000
Subject: optimization/10208: Empty structs removed by gcc but not by g++
Reply-to: lex dot augusteijn at philips dot com
>Number:         10208
>Category:       optimization
>Synopsis:       Empty structs removed by gcc but not by g++
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 25 13:16:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     lex dot augusteijn at philips dot com
>Release:        gcc 3.2.1 and preceeding releases
>Organization:
>Environment:
HP-UX SunOS Linux
>Description:
The following struct is compiled differently by gcc and g++

typedef struct {
  int x;
  struct { } bar;
  int y;
} foo;

gcc removes the member bar, g++ does not.
This gives trouble when accessing member y in a system
containing both gcc and g++ compiled object files.
>How-To-Repeat:
untar the attached file
gcc -c gcc-empty-struct-bug.c
g++ gcc-empty-struct-bug2.cc gcc-empty-struct-bug.o
a.out
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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