#include line transforms for dependencies in a directory.
This property specifies rules to transform macro-like
during implicit dependency scanning of C and C++ source files. The
list of rules must be semicolon-separated with each entry of the form
% must be literal). During dependency
scanning occurrences of
#include lines will be
replaced by the value given with the macro argument substituted for
%. For example, the entry
will convert lines of the form
allowing the dependency to be followed.
This property applies to sources in all targets within a directory. The property value is initialized in each directory by its value in the directory's parent.