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we7765 authored
Since vendor Makefiles make use of special GNU make features, we can safely rely on GNU make being in operation. GNU make provides the variable MAKEFILE_LIST from which the relative path can be extracted at which Makefile_var was found. This exactly is the path of the contrib directory, such that the user (calling Makefile) needs not set this variable. Currently the calling Makefiles still set a variable CONTRIBDIR which then simply is overwritten in Makefile_var. Such the setting of CONTRIBDIR is unnecessarily doubled.
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