That is we actually parse the mkspec and evaluate QMAKE_CXX (and a few
other variables) to figure out the correct mkspec. This makes using
custom mkspecs easier and is also cleaner. I also changed mkspec() and
mkspecPath() to behave a little diffrent, essentialy mkspec() will
return only the name (the actual dir name) of the mkspec. That is in
general not sufficient for passing on to qmake. mkspecPath() only
returns the correct path to mkspecs/default.
Hopefully I haven't broken WinCE/Maemo/MinGW.

it is alread used for the error cases anyway.
one could introduce an intermediate state InferiorRunningFailed, but
this doesn't seem to bring any advantages.

this includes:
- move the gdb ownership back to the engine (thus strip down the
  adaptors as far as possible)
- make gdb startup synchronous
- make adapter shutdown synchronous
- fix the state transitions relating to shutdown

This should save debugger round trips and crashes in the debugging
helpers.
Add respective option to debugging helper option page, defaulting to
true.On this occasion, make CDB detect shadowed variables correctly
and display them as "<shadowed n>" as does the Gdb engine by
reversing the direction in which
CdbSymbolGroupContext::populateINameIndexMap works.
Rubber-stamped-by: hjk <qtc-committer@nokia.com>

after refactoring the trk adapter startup, the split was not necessary
any more. in fact, it seemed fairly arbitrary at this point.

- Turn off initial breakpoint when attaching (terminal) and
  additionally ignore it before the first startup complete
- Refuse to step  the artifical thread created when
  interrupting
- If possible, switch to thread 0 when interupting (do not
  use artificial thread)
- Ignore non-fatal exceptions in dumper calls (stray Startup-
  complete-traps)
- Use right thread for dumper call loading
- Rename windows exception code enumeration
- Turn off modification off watch-data children by setType,
  show empty lists correctly.
- Verbose warnings about inserting invalid watch data.

this drastically improves the usefulness of the debugger output window
by making internal and external messages appear in sync.

Add a configuration checking method to the Debugger manager,
depending on toolchain, wire it to the engines.
Check that in the debugger run controls.

Add a convenience method to ICore that shows a warning
message with a "Settings" button, pointing the user
to a configuration error on a settings page.

Remove leftovers of the dumper parser.
Acked-by: con <qtc-committer@nokia.com>

it's dead code

Correctly reset state on missing Symbian gdb.
Provide "settings" options.
Reviewed-by: hjk <qtc-committer@nokia.com>

Enable debugger actions correctly.
Reviewed-by: hjk <qtc-committer@nokia.com>

Acked-by: hjk <qtc-commiter@nokia.com>

Also move Designer::Internal::FormWindowEditor ->
Designer::FormWindowEditor.

Use non-mixed mode if source is not available.

state when gdb is attached to a core.

Remove conditionals from toolchain enumeration, pass parameters to
TrkGdbAdapter, rename function in runconfig, derive symbol
file from local exe file.

For device debugging. Move both from namespace
Debugger::Internal to Debugger, export them, give
DebuggerManager a static instance().

Clean out header.

Intergrate per-engine state tracking with the global running/stopped state.