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and subject line bug #94955 reported against g++-2.95
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To: [EMAIL PROTECTED]
Subject: Linking with libstdc++ changes behavior of a program (which does not
require libstdc++)
From: Philippe Troin <[EMAIL PROTECTED]>
Date: 22 Apr 2001 23:31:18 -0700
Message-ID: <[EMAIL PROTECTED]>
Lines: 66
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Package: libstdc++2.10-glibc2.2
Version: 1:2.95.3-8
==== BEGIN TRANSCRIPT ================================================
[EMAIL PROTECTED]:~% cat foo.cpp
#include <unistd.h>
class EX
{
public:
EX() { write(2,"XCR\n",4); }
virtual ~EX() { write(2, "XD\n", 3); }
EX(const EX&) { write(2, "XCP\n", 4); }
};
class EY : public virtual EX
{
public:
EY() { write(2,"YCR\n",4); }
~EY() { write(2, "YD\n", 3); }
EY(const EY&) { write(2, "YCP\n", 4); }
};
int main()
{
try {
throw EY();
}
catch(const EY&)
{
}
return 0;
}
[EMAIL PROTECTED]:~% gcc -o foo foo.cpp
[EMAIL PROTECTED]:~% ./foo
XCR
YCR
XCR
YCP
YD
XD
YD
XD
[EMAIL PROTECTED]:~% gcc -o foo foo.cpp -lstdc++
[EMAIL PROTECTED]:~% ./foo
XCR
YCR
XCR
YCP
YD
XD
zsh: 11278 illegal hardware instruction ./foo
[EMAIL PROTECTED]:~%
==== END TRANSCRIPT ================================================
This program does not require libstdc++... However, if libstdc++ is
linked in, the program crashes...
This problem occurs only on the mips architecture.
Well, actually, a bigger program (aleph package) has the same problem
(works when NOT linked with libstdc++, crashes when linked with
libstdc++) on both mips and arm. I isolated the problem to this simple
test case on mips.
Phil.
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Date: Tue, 14 Oct 2003 13:38:44 -0700
From: Ryan Murray <[EMAIL PROTECTED]>
To: Matthias Klose <[EMAIL PROTECTED]>
Cc: Philippe Troin <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: bug #94955 reported against g++-2.95
Message-ID: <[EMAIL PROTECTED]>
References: <[EMAIL PROTECTED]>
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On Tue, Oct 14, 2003 at 09:38:55PM +0200, Matthias Klose wrote:
> Please could you check, if this is fixed with our current default
> compiler (3.3.2)?
As I wrote in May of last year, this is almost certainly caused by the
horribly incomplete exception handling in 2.95.x on mips, which was fixed in
3.0. There has been no response from Phil since then, and the package that
found the problem is built on mips and mipsel, so I'm closing the bug at th=
is
point.
--=20
Ryan Murray, Debian Developer ([EMAIL PROTECTED], [EMAIL PROTECTED])
The opinions expressed here are my own.
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