AIX g++ 3.0.2 Undefined symbol: virtual thunk to...

[Robert Boehne <rboehne at ricardo-us dot com>]

Hello,

I've got a bit of a problem here, and I suspect it might be due to
the fact I'm using gcc configured without shared libraries.
I could find no mention of "virtual thunk" (only non-virtual thunk)
in gnats, and I couldnt' find anything to suggest (to me) that
the two problem reports were related.

Any ideas?  What is a "thunk"?

Thanks,

Robert

/bin/sh ../libtool --mode=link g++  -g -O2  -lpthread -o object_test 
object_test.o ../sigc++/libsigc.la
g++ -g -O2 -o .libs/object_test object_test.o  -L../sigc++/.libs -lsigc
-lpthread -Wl,-bnolibpath
-Wl,-blibpath:/icarus/sigc++/ibm43/lib:/usr/lib:/lib
ld: 0711-224 WARNING: Duplicate symbol:
std::_Format_cache<char>::_S_pword_ix
ld: 0711-341 WARNING: Replaced XTY_CM symbol
std::_Format_cache<char>::_S_pword_ix requires an
        alignment more strict than the alignment of the symbol that
replaces it.
ld: 0711-224 WARNING: Duplicate symbol: std::numpunct<char>::id
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
information.
ld: 0711-317 ERROR: Undefined symbol: virtual thunk to
SigC::Object::~Object()
ld: 0711-317 ERROR: Undefined symbol: virtual thunk to
SigC::Object::~Object()
collect2: ld returned 8 exit status           

boreas::/boreas/build302 (78)% gcc -v
Reading specs from
/boreas/gcctest/lib/gcc-lib/powerpc-ibm-aix4.3.3.0/3.0.2/specs
Configured with: /boreas/gcc-3.0.2/configure
--with-gcc-version-trigger=/boreas/gcc-3.0.2/gcc/version.c
--host=powerpc-ibm-aix4.3.3.0 --prefix=/boreas/gcctest --enable-threads
--enable-languages=c,c++ --without-gnu-ld --with-gnu-as
--infodir=/net/InHouse/emacs/20.7/info --enable-static --disable-shared
Thread model: single
gcc version
3.0.2                                                                                                 

-- 
Robert Boehne             Software Engineer
Ricardo Software   Chicago Technical Center
TEL: (630)789-0003 x. 238
FAX: (630)789-0127
email:  rboehne@ricardo-us.com