On Linux, versioned ELF symbols are stored in the static symtab with an
(@)@VERSION suffix. We store such symbols with the suffix and thus fail
to find them when looking up the real name.

This causes failures such as the one described here:
http://www.sourceware.org/ml/gdb/2006-08/msg00244.html

In the general case, GDB doesn't use the dynamic symtab because it
contains usually only a subset of the static table information. The
attached patch make GDB store dynamic versioned symbols. 

Maybe this is harvests too much symbols, and we should limit it to the
dynamic symbols of the main executable. It's easy enough to do, we just
need to pass the 'mainline' flag to elf_symfile_read from
elf_symtab_read. 

I've no idea if this could break something on non-Linux platforms, I've
just tested on x86-linux.

I'm also attaching a little testsuite patch that fails for me on current
GDB and works with the patch.

Opinions?

2006-08-31  Frederic Riss  <frederic.riss@st.com>

	* elfread.c (elf_symtab_read): Read versioned symbols from 
	the dynamic symtab.

2006-08-31  Frederic Riss  <frederic.riss@st.com>

	* gdb.cp/userdef.exp: Test use of std::cout.