input: [Description] All make rules. This file is a concatenation of all rule files above. While the differential build regenerates the other Make_-files selectively, this one gets always assembled from the input files which may or may not have been reused in the process. The make program which builds the site uses this file. Note the time stamp: this file is the last one to be written into, before make takes over the build. [File] 
output: Makefile