* dbxout.c (dbxout_begin_prologue): New function.

        (dbx_debug_hooks): Use new begin prologue hook.
        (dbxout_function_end): Emit N_ENSYM.
        * stab.def (N_BNSYM, N_ENSYM): Define and document these two new stabs.

        testsuite:
        gcc.dg/darwin-20040809-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@85908 138bc75d-0d04-0410-961f-82ee72b054a4