c++/7518: Problem on opening a shared library with Gcc3.1.1

c++/7518: Problem on opening a shared library with Gcc3.1.1

[lionel.champalaune]

>Number:         7518
>Category:       c++
>Synopsis:       Problem on opening a shared library with Gcc3.1.1
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 07 00:36:04 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Lionel Champalaune
>Release:        GCC 3.1.1
>Organization:
>Environment:
i686-pc-linux
>Description:
An error message appear when a shared library is opened.
    > Error: ./libTestlib.so: undefined symbol:
_ZNSt19basic_ostringstreamIcSt11char_traitsIcESaIcEEC1ESt13_Ios_Openmode 
This problem didn't appear with the 3.1 version.
Libtool is used, and it's in the generated compilation that the bug
appears.
This problem doesn't appear when the -g option to gcc is given.
By using g++ instead of gcc, the problem disappear. gcc is used by
libtool in a looklike utilization.
>How-To-Repeat:
run the file Command:
        >./Commandgcc
>Fix:
Used g++ instead of gcc in the second line:
        >./Commandg++
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="Commandgcc"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="Commandgcc"

ZysrIC1jIC1vIFRlc3RsaWIubG8gVGVzdGxpYi5DIApnY2MgLXNoYXJlZCBUZXN0bGliLmxvIC1X
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LkMgLWxkbAouL2Eub3V0Cg==

Re: c++/7518: Problem on opening a shared library with Gcc3.1.1

[nathan]

Synopsis: Problem on opening a shared library with Gcc3.1.1

State-Changed-From-To: open->closed
State-Changed-By: nathan
State-Changed-When: Fri Sep 13 16:21:06 2002
State-Changed-Why:
    works in 3.2

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7518

Re: c++/7518: Problem on opening a shared library with Gcc3.1.1

[Lionel Champalaune]

The following reply was made to PR c++/7518; it has been noted by GNATS.

From: Lionel Champalaune <Lionel.Champalaune@sophia.inria.fr>
To: gcc-gnats@gcc.gnu.org, nobody@gcc.gnu.org
Cc:  
Subject: Re: c++/7518: Problem on opening a shared library with Gcc3.1.1
Date: Wed, 07 Aug 2002 09:44:20 +0200

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 The file attachments didn't work.
 here is the files needed..
 
 
 Regards
 Lionel Champalaune
 
 gcc-gnats@gcc.gnu.org wrote:
 > 
 > Thank you very much for your problem report.
 > It has the internal identification `c++/7518'.
 > The individual assigned to look at your
 > report is: unassigned.
 > 
 > >Category:       c++
 > >Responsible:    unassigned
 > >Synopsis:       Problem on opening a shared library with Gcc3.1.1
 > >Arrival-Date:   Wed Aug 07 00:36:04 PDT 2002
 --------------2F5F7D234D49AC23BD540F4F
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  name="Commandg++"
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  filename="Commandg++"
 
 g++ -c -o Testlib.lo Testlib.C 
 g++ -shared Testlib.lo -Wl,-soname -Wl,libTestlib.so -o libTestlib.so
 g++ Testmain.C -ldl
 ./a.out
 
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  name="Commandgcc"
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  filename="Commandgcc"
 
 g++ -c -o Testlib.lo Testlib.C 
 gcc -shared Testlib.lo -Wl,-soname -Wl,libTestlib.so -o libTestlib.so
 g++ Testmain.C -ldl
 ./a.out
 
 --------------2F5F7D234D49AC23BD540F4F
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  name="Testmain.C"
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 Content-Disposition: inline;
  filename="Testmain.C"
 
 #include <dlfcn.h>
 #include <iostream>
 
 int
 main()
 {
     void *handle = dlopen ("./libTestlib.so", RTLD_NOW);
     char *error;
     if ((error = dlerror())!=0) {
       std::cerr << "      Error: " << error << std::endl;
       return 1;
     }
 }
 
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  name="Testlib.C"
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 Content-Disposition: inline;
  filename="Testlib.C"
 
 
 #include <string>
 #include <sstream>
 
 void f()
 {
 	std::ostringstream ost;
 	ost << "toto";
 	const std::string s = ost.str();
 }
 
 
 
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