(get_debug_format): New function to get debug format.
(debug_format): New global variable to hold last value set
by get_debug_format.
* gdb.base/list.exp: Call get_debug_format and expect some
tests to fail for DWARF 1 and COFF formats.
* gdb.c++/ptype.exp: Ditto.
* gdb.c++/classes.exp: Ditto.
* gdb.c++/cplusfuncs.exp: Ditto.
* gdb.c++/inherit.exp: Ditto.
* gdb.c++/templates.exp: Ditto.
* gdb.c++/virtfunc.exp: Ditto.
* gdb.base/ptype.exp: Don't call "gdb_exit; gdb_start" if we're
aborting; the testsuite driver will do that for us (see
gdb_finish). Also, use gdb_test in a few more places.
"backtrace through signal handler" to "i*86-*-sysv4*".
* gdb.base/signals.exp: Add xfail for "'next' behaved as
continue" case. Add "known SVR4 bug" to fail message.
Add "i*86-*-bsdi2.0" xfail for "handle all print".
Add "i*86-*-bsdi2.0" xfail for "backtrace in signals_tests_1".
* gdb.base/ptype.exp: Add "i*86-*-sysv4*" xfail for
"whatis unnamed typedef'd enum..." and "ptype t_char_array".
* gdb.base/langs.exp: Add "i*86-*-sysv4*" xfail for
"up to foo in langs.exp", "show language at foo in
langs.exp", "up to cppsub_ in langs.exp", "show
language at cppsub_ in langs.exp", "up to fsub in
langs.exp", and "show language at fsub in langs.exp".
* gdb.base/corefile.exp: Add "i*86-*-sysv4*" to xfail for
"bactrace in corefile.exp".
* gdb.base/callfuncs.exp: Change xfail to "i*86-*-*" for
"call inferior function with struct - returns float" and
"call inferior function with struct - returns double".