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Date: Wed, 18 Jun 2003 23:44:00 -0000
From: "bgreen at nas dot nasa dot gov" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20030618234434.11247.bgreen@nas.nasa.gov>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug c++/11247] New: -frepo fails to instantiate typeinfo
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X-SW-Source: 2003-06/txt/msg02053.txt.bz2
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11247

           Summary: -frepo fails to instantiate typeinfo
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: bgreen@nas.nasa.gov
                CC: gcc-bugs@gcc.gnu.org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu

The code presented does not link successfully when using the -frepo option.
The compiler fails to instantiate a typeinfo object in order to perform a
dynamic cast operation.  Failure of the code to link successfully inhibits
library design.
The code builds successfully when not using '-frepo'.

[bgreen@ece06 ~/test]$ g++ -v
Reading specs from /home/bgreen/local/gcc/lib/gcc-lib/i686-pc-linux-gnu/3.3.1/specs
Configured with: ../gcc/configure --prefix=/home/bgreen/local/gcc
--enable-__cxa_atexit --enable-languages=c,c++,f77
Thread model: posix
gcc version 3.3.1 20030616 (prerelease)

[bgreen@ece06 ~/test]$ make
g++ -g -Wall -frepo   -c -o test.o test.C
g++ -g -Wall -frepo -o test test.o
test.o(.text+0x28): In function `main':
/home/bgreen/test/test.C:18: undefined reference to `typeinfo for IType<int>'
collect2: ld returned 1 exit status
make: *** [test] Error 1

[bgreen@ece06 ~/test]$ cat test.C
 
class IBase
{
public:
    virtual ~IBase() {}
};
 
template <typename T>
class IType : public IBase
{
public:
    IType() {}
};
 
int main()
{
    IBase *p = 0;
    dynamic_cast<IType<int>*>(p);
}