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Setting up the debugger connection might fail for a couple of reasons.
Check the application output to show the user a more detailed error
message.

Reviewed-by: hjk

Refactor ToolChains in Qt Creator:

 * Allow for several toolchains of the same type
 * Be smarter wrt. guessing what kind of output a toolchain
   produces. This allows us to eventually handle e.g. embedded
   linux setups way better than before.
 * Be smarter wrt. guessing what kind of environment a Qt version
   needs.
 * Improve auto-detection of toolchains a bit
 * Decide on which debugger to use based on the kind of output
   produced by the compiler.
 * Add options page to configure toolchains
 * Remove toolchain related options from the Qt version dialog

Reviewed-by: dt

Extend text editor tooltips by a 'widget content', making
it possible to show any widget utilizing the fact that the
QTipLabel actually is a frame (and thus a container).
Introduce concept of 'interactive' tooltips and modify
the tooltip-closing mechanism such that simple interaction
is possible. Emit the base text editor's tooltip signals
with the correct position and add API to calculate the tooltip
position from the cursor position.
Add API for pinning tooltips to the text editor (by removing
them from the QTipLabel layout).
Modify the Debugger's tooltipmanager not to manage tooltips
under TextEditor control and to take over control only once
tooltips are pinned.
Rubber-stamped-by: Leandro T. C. Melo <leandro.melo@nokia.com>

Introducing EngineDefault such that CDB/LLDB can use full paths
by default and gdb can use short paths.

Reviewed-by: hjk

Move tooltip-request handling from DebuggerPlugin into
DebuggerToolTipManager.

Request tooltip only if position changed and close
standard tooltip on success.

Replace old debugger tooltip by a new ToolTipManager which
has a list of AbstractDebuggerToolTipWidget with the functionality
to 'acquire' an engine (display its data) and 'release' it
(store engine data and display them as 'previous') and serialization
to XML session data.
DebuggerTreeViewToolTipWidget implements AbstractDebuggerToolTipWidget
for tree model acting as  a filter on watch models.

Rubber-stamped-by: hjk

Old logic was too fragile to maintain.
Now it's  PointMixed -> PointPlain -> RangeMixed -> RangePlain.

Handle in editBreakpoint().

Acked-by: hjk

Separate the two warnings by a '. '.

Add commands (CDB, gdb with '\n' delimiter for multiple),
rearrange dialogs, make ignore count a spin box.

Reviewed-by: hjk

Particularly affecting Windows DLL loading, which was previously
suppressed.

Reviewed-by: hjk
Task-number: QTCREATORBUG-3470

still racy

This was the last feature that was only available in the compiled dumpers.