undefined reference to `typeinfo

[Ross Boylan]

This command (generate by libtool)
g++ -o test1 -g AbstractTimeStepsGenerator.o Coefficients.o Covariates.o
Data.o FixedTimeStepsGenerator.o LinearProduct.o Path.o
LinearProduct_test.o Coefficients_test.o basic_test.o main_test.o
ScratchPad_test.o ScratchDataProducer_test.o Covariates_test.o
Data_samples.o EnvPath_samples.o Rstub.o  -lboost_unit_test_framework

Generates these errors:
LinearProduct.o(.gnu.linkonce.r._ZTIN6mspath17DataLinearProductE
+0x8):/usr/include/c++/3.3/bits/stl_tree.h:159: undefined reference to
`typeinfo for mspath::AbstractLinearProduct'
LinearProduct.o(.gnu.linkonce.r._ZTIN6mspath26PathDependentLinearProductE+0x8):/usr/include/c++/3.3/bits/stl_tree.h:159: undefined reference to `typeinfo for mspath::AbstractLinearProduct'
LinearProduct_test.o(.gnu.linkonce.r._ZTIN6mspath21ConstantLinearProductE+0x8):/usr/include/boost/test/test_tools.hpp:427: undefined reference to `typeinfo for mspath::AbstractLinearProduct'

The type AbstractLinearProduct is defined in the header for
LinearProduct, which is included in the .cc file.  Googling, it sounds
as if complaints about typeinfo may signal missing RTTI.  However, I did
not compile with no-rtti, and the included files referenced are all
source files.

I do use some dynamic_cast's, though none of them mention
AbstractLinearProduct explicitly.

I'd appreciate any pointers you can offer.  Is it possible that because
AbstractLinearProduct is never instantiated (it can't be, having pure
virtual functions), some needed info isn't being generated that's needed
elsewhere?

$ g++ --version
g++ (GCC) 3.3.5 (Debian 1:3.3.5-8)

Running on Debian GNU/Linux, 2.4.27 kernel (mostly the Debian testing
distribution).
-- 
Ross Boylan                                      wk:  (415) 502-4031
530 Parnassus Avenue (Library) rm 115-4          ross@biostat.ucsf.edu
Dept of Epidemiology and Biostatistics           fax: (415) 476-9856
University of California, San Francisco
San Francisco, CA 94143-0840                     hm:  (415) 550-1062