CDBS is the Common Debian Build System, an abstract build system based on Makefile inheritance which is completely extensible and overridable. In other words, CDBS provides a sane set of default rules upon which packages can build; any or all rules may be overridden as needed.
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At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.