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Re:Tup – A file-based build system for Linux, OS X, and Windows by rjsw on Sunday October 02, 2016 @03:53PM (#12623915)
Maybe you are thinking of ClearCase [1].

[1] https://en.wikipedia.org/wiki/Rational_ClearCase

Re:Tup – A file-based build system for Linux, OS X, and Windows by exDM69 on Sunday October 02, 2016 @05:08PM (#12624259)
No, definitely not that.