Re: undefined virtual table references in 2.12 and later

["H. J. Lu" <hjl at lucon dot org>]

On Wed, May 28, 2003 at 01:43:35PM -0500, Donald Zoch wrote:
> I have recently encountered a problem when trying to upgrade my
> binutils 2.11 to version 2.13.2.1.  I even tried the development
> version binutils-2.14.90.0.4.  From what I can tell, the problem
> started happening with version 2.12.   The problem is that when I
> try and link my executable, I'm getting a bunch of errors like these:
> 
> /u/zochd/build2/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/libgcc.a(exception.o):
> In function `__check_eh_spec':
> /u/zochd/gcc-2.95.3/build2/gcc/../../gcc/cp/exception.cc:307:
> undefined reference to `bad_exception type_info function'
> /u/zochd/build2/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/libgcc.a(exception.o):
> In function `__check_eh_spec':
> /u/zochd/gcc-2.95.3/build2/gcc/include/exception:15: undefined
> reference to `exception virtual table'
> /u/zochd/gcc-2.95.3/build2/gcc/include/exception:22: undefined
> reference to `bad_exception virtual table'
> 
> I sent a message a few days ago about this and someone responded, 
> saying that I should try the latest version and that it might be 
> a problem with the way GNU_VTINHERIT and GNU_VTENTRY relocs are 
> handled.
> 
> >From what I can tell though, in my libgcc.a (I'm using gcc 2.95.3),
> the symbols are defined as weak objects, but then undefined several
> times also:
> 
> 00000000 V bad_exception virtual table
> 00000000 V exception virtual table
>          U exception virtual table
>          U exception virtual table
>          U exception virtual table
> 
> I was wondering if anyone could explain to me what is happening,
> and how that I might fix it.  I'd like to understand what the 
> proper behavior should be, and what source files within binutils
> I could take a look at to try and make it behave as version 
> 2.11 did.  Is this a problem with binutils or gcc? 
> I work in an environment where we need to provide multiple versions 
> of gcc, but preferably have one version of binutils work for them all.   

Please provide a small testcase. I will look into it.


H.J.