* lib/gdb.exp (gdb_file_cmd): Revert the return value to
previous simple convention. Use a global variable to store
information about what was found.
(gdb_run_cmd): Adapt to reverted return value.
* gdb.base/remote.exp: Adapt to reverted return value.
* gdb.gdb/complaints.exp: Likewise.
* gdb.gdb/observer.exp: Likewise.
* gdb.gdb/selftest.exp: Likewise.
* gdb.gdb/xfullpath.exp: Likewise.
With code from Manoj Iyer <manjo@austin.ibm.com>:
* lib/gdb.exp (gdb_file_cmd): Return more information in the
return value. Add an arm for "no debugging symbols found".
Change a stray "error" to "perror".
(gdb_run_cmd): Adapt to new return value.
* gdb.base/remote.exp: Adapt to new return value.
* gdb.gdb/complaints.exp: Likewise.
* gdb.gdb/observer.exp: Likewise.
* gdb.gdb/selftest.exp: Likewise.
* gdb.gdb/xfullpath.exp: Likewise.
* gdb.gdb/complaints.exp (test_initial_complaints): Rename
test_isolated_complaints.
(test_empty_complaint): New function.
(test_empty_complaints): New function. Check no output when no
complaints.