* gdb.base/constvars.exp: Do not force lang=c++ if using HP
compilers. Delete duplicate call to get_compiler_info.
(local_compiler_xfail_check): setup_xfail if $hp_cc_compiler.
* gdb.base/volatile.exp: Likewise.
backtracing in a called function.
* gdb.base/constvars.exp: Only set lang to C++ if we're
compiling the test with HP's compilers.
* gdb.base/volatile.exp: Similarly.
* lib/gdb.exp (test_debug_format): New proc.
(setup_xfail_format): Use new proc test_debug_format.
* gdb.base/constvars.exp (local_compiler_xfail_check): New
proc; use new service proc test_debug_format.
Replace all other "gcc_compiled" tests with this test.
* gdb.base/volatile.exp (local_compiler_xfail_check): New
proc; use new service proc test_debug_format.
Replace all other "gcc_compiled" tests with this test.
* gdb.base/miscexprs.exp: Change patterns to match GDB's
actual output formatting.
* gdb.base/smoke.exp: GDB removes leading 0's.
* gdb.base/volatile.exp: Don't check type of remuneration;
that variable is no longer defined in constvars.c.
* gdb.base/step-test.c (main): Exit with explicit exit code.
* gdb.base/step-test.exp: Remove two nexti checks--they are
not portable.
