genmkgen.pl — generate makefile_idl.gen
mkgen.pl [OPTION...] [directory]
Generate makefile_idl.gen files from idl.list files found in specified directory and its subdirectories. If no directory is specified, current directory and all its subdirectories are processed.
Syntax of idl.list files is described in Section D.2, “The idl.list File”.
The genmkgen.pl can be found in the src/core/factgen subdirectory of the massiv source root directory. Check its perldoc documentation for more detailed info.