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Date: Mon, 18 Feb 2002 08:16:00 -0000
From: peter_broadhurst@ml.com
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Subject: c++/5721: link errors when using typedef struct {...}A;
X-SW-Source: 2002-02/txt/msg00432.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         5721
>Category:       c++
>Synopsis:       link errors when using typedef struct {...}A;
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 18 08:16:06 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     peter_broadhurst@ml.com
>Release:        3.0.3
>Organization:
>Environment:
sparc-sun-solaris2.6
i386-redhat-linux (redhat 7.1)
>Description:
The files below give a link time error (undefined symbol A::f()) when compiled and linked.

If the definition of A::f() is moved to the same file where it is used, then the problem disappears.

if "struct A { void f(void); }; " is used, then the problem disappears.

nm indicates that a local-only definition of A::F() is placed in typedeflinkbug2.o.

Works in gcc 2.8.1

==> typedeflinkbug.h <==
typedef struct
{
void f(void);
} A;

==> typedeflinkbug1.cpp <==
#include "typedeflinkbug.h"
int main(int,char**)
{
A a;
a.f();
return 0;
}

==> typedeflinkbug2.cpp <==
#include "typedeflinkbug.h"
void A::f(void) 
{
}
>How-To-Repeat:

>Fix:

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