when saving index.
* dwarf2read.c (dw2_dump): Print some minimal information indicating .gdb_index is in use. * symfile.c (reread_symbols): Reset objfile->sf. testsuite/ * gdb.dwarf2/Makefile.in (EXECUTABLES): Add gdb-index. (clean): rm -f *.gdb-index *.with-index. * gdb.dwarf2/gdb-index.exp: New testcase.