CMake/Help/prop_dir/IMPLICIT_DEPENDS_INCLUDE_TR...

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IMPLICIT_DEPENDS_INCLUDE_TRANSFORM
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Specify #include line transforms for dependencies in a directory.
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
::
MYDIR(%)=<mydir/%>
will convert lines of the form
::
#include MYDIR(myheader.h)
to
::
#include <mydir/myheader.h>
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.