Disallowed since version 3.0. See CMake Policy
Approximate C preprocessor dependency scanning.
This command exists only because ancient CMake versions provided it. CMake handles preprocessor dependency scanning automatically using a more advanced scanner.
Outputs a list of all the source files that are required by the
srcfile. This list is written into
outputfile. This is
similar to writing out the dependencies for
srcfile except that it
.h files into
.cpp files if possible.