xcode7 - Xcode 7 Unable to determine compiler to use -

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i following errors in xcode 7 when opening os x app:

unable determine compiler use - abstract compiler specification missing xcode installation.

and

unexpected tool settings, missing default value vfs output path

i've tried rebooting this post suggests, no avail. i'm running os x 10.10.4

edit here screenshot: error

very lucky.

and got error morning.

everything worked fine until yesterday , didn´t change settings. gui changes. switched between yosemite elcap , error occurs on both systems.


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