it's well within expectations that they do not exist at the time of
configuration (especially when shadow building).
additionally, keeping the validation info (macros and environment)
up-to-date would require a notification infrastructure which is just not
worth the effort.
Existing Directory checks for whether the directory exists, which
Directory does not. Also changes all existing PathChoosers from
Directory to ExistingDirectory as that does not change behaviour.
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
Almost(*) all of the symbian and maemo specific code is now theoretically
moveable to a separate plugin. Thus making it possible to implement
new targets in a plugin.
(*) Noteable missing is the qtversion, which needs to be split up
per target too.
Also fixes
Task-Nr: QTCREATORBUG-2440
Reviewed-By: hunger
Reviewed-By: ck
