Bug#35023: marked as done (libc6: C++ incompatibility bug)
Your message dated Mon, 17 Nov 2003 11:03:27 -0800
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and subject line C++ ABI change since then.
has caused the attached Bug report to be marked as done.
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From: Jason Gunthorpe <jgg@gpu.srv.ualberta.ca>
Subject: libc6: C++ incompatibility bug
To: submit@bugs.debian.org
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Date: Wed, 24 Mar 1999 17:47:54 -0700
Package: libc6
Version: 2.1.1-0.1
I have created a test case derived from the code in APT that when runs on
glibc 2.1 without recompilation fails. The test case is very simple:
#include <iostream>
#include <fstream>
void die(const char *S)
{
cerr << S << endl;
exit(1);
}
int main(int argc,const char *argv[])
{
ifstream F(argv[1],ios::in | ios::nocreate);
if (!F != 0)
die("!F #1");
streampos Off = F.tellg();
if (!F != 0)
die("!F #2");
return 0;
}
Results on glibc2.1 using 2.0 compiled binary..
[..]
open("/var/state/apt/lists/mirror_debian_dists_potato_main_binary-i386_Packages",O_RDONLY)=3
fstat(3, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x40014000
_llseek(3, 4294967296, 0xbffffb10, 0x4016521c /* SEEK_??? */) = -1 EINVAL
(Invalid argument)
write(2, "!F #2", 5!F #2) = 5
write(2, "\n", 1
) = 1
_exit(1) = ?
Results on glibc2.1 using a 2.1 compiled binary..
[..]
open("/var/state/apt/lists/mirror_debian_dists_potato_main_binary-i386_Packages",O_RDONLY|0x8000)=3
fstat(3, {st_mode=0, st_size=0, ...}) = 0
mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x40014000
_llseek(3, 0, {0}, SEEK_CUR) = 0
close(3) = 0
munmap(0x40014000, 4096) = 0
_exit(0) = ?
The key difference appears to be in how llseek is called. I belive that if
this is fixed APT 0.1.10 will run without recompilation on glibc2.1.
This bug may be related to #34953
Jason
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>From jbailey@nisa.net Mon Nov 17 13:10:30 2003
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Date: Mon, 17 Nov 2003 11:03:27 -0800
From: Jeff Bailey <jbailey@nisa.net>
To: 35023-done@bugs.debian.org
Subject: C++ ABI change since then.
Message-ID: <20031117190327.GA22082@marge.v3.ca>
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Since this bug has been reported, there has been a C++ ABI change. All
C++ apps need to be recompiled anyway to work on a modern system.
Tks,
Jeff Bailey
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