Heya,
Long story short, I hit this:
http://stackoverflow.com/questions/12595631/debugging-with-gdb-on-a-program-with-no-optimization-but-still-there-is-no-symbo
and can't find the problem, it applies here because like the asker of
that question I am using a recent GCC build, maybe a week old?
Snapshot gcc-4.7-20130223 is now available on
ftp://gcc.gnu.org/pub/gcc/snapshots/4.7-20130223/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.
This snapshot has been generated from the GCC 4.7 SVN branch
with the following options: svn://gcc.gnu.org/svn/gcc/branches