Specify #include line transforms for dependencies in a target.

This property specifies rules to transform macro-like #include lines during implicit dependency scanning of C and C++ source files. The list of rules must be semicolon-separated with each entry of the form A_MACRO(%)=value-with-% (the % must be literal). During dependency scanning occurrences of A_MACRO(...) on #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

#include MYDIR(myheader.h)


#include <mydir/myheader.h>

allowing the dependency to be followed.

This property applies to sources in the target on which it is set.