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c++/10782: undefined reference to `virtual thunk ...

>Number:         10782
>Category:       c++
>Synopsis:       undefined reference to `virtual thunk ...
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 14 14:46:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     dens@stl.sarov.ru
>Release:        unknown-1.0
>Organization:
>Environment:
cat /proc/version 
Linux version 2.4.18-14smp (bhcompile@stripples.devel.redhat.com) (gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)) #1 SMP Wed Sep 4 12:34:47 EDT 2002

cat /etc/issue
Red Hat Linux release 8.0 (Psyche)
Kernel \r on an \m

rpm -qa | grep gcc
gcc-gnat-3.2-7
gcc-objc-3.2-7
gcc-3.2-7
libgcc-3.2-7
gcc-g77-3.2-7
gcc-java-3.2-7
gcc-c++-3.2-7
>Description:
G++ doesn't generate virtual thunk for c21 destructor from attached sample:

nm gtest.o | grep c21D
000006e4 T _ZN3c183c193c21D0Ev
0000066a T _ZN3c183c193c21D1Ev
000005ec T _ZN3c183c193c21D2Ev
         U _ZTv0_n16_N3c183c193c21D0Ev
         U _ZTv0_n16_N3c183c193c21D1Ev
[dens@sr007lnx work]$ g++ gtest.cpp 
gtest.cpp:69: warning: direct base `c0::c1' inaccessible in `c8' due to 
   ambiguity
/home/dens/tmp/ccbwnzlp.o(.gnu.linkonce.d._ZTC3c264_N3c183c193c21E+0x30): undefined reference to `virtual thunk [v:0,-16] to c18::c19::c21::~c21 [in-charge]()'
/home/dens/tmp/ccbwnzlp.o(.gnu.linkonce.d._ZTC3c264_N3c183c193c21E+0x34): undefined reference to `virtual thunk [v:0,-16] to c18::c19::c21::~c21 [in-charge deleting]()'
collect2: ld returned 1 exit status
 
NB in case when c26 constructor is "inline" thunk is not needed. It isn't good also.
>How-To-Repeat:
g++ gtest.cpp
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="gtest.cpp"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="gtest.cpp"

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