Get rid of custom logic to handle shadow builds (which didn't work
anyway if the qml files are from a different directory than expected).
Instead, just search for the file name in the list of files from the
project.
Reviewed-by: Christiaan Janssen
Add combo box listing toolchains with debuggers to start external,
attach and core.
Another attempt at streamlining engine detection:
Split in detection functions that first collect a list of
available engines by preference, then remove disabled and
wrongly configured engines and use the remaining best.
matching. checkconfiguration is now the central place where
engine detection and config check takes place.
Rubber-stamped-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
