Currently, it seems impossible to set breakpoints with gdb in native
libraries loaded via the new classmap.db mechanism, aka the 'BC API'.
(I know that the library in question _is_ being loaded, because it appears
in a stack trace in the debuggee!)
I have filed this problem as gdb PR 1907 (see
http://sources.redhat.com/cgi-bin/gnatsweb.pl?database=gdb ).
--
Robin