CMake/Help/prop_tgt/INTERFACE_COMPILE_DEFINITIONS.rst

INTERFACE_COMPILE_DEFINITIONS
-----------------------------

List of public compile definitions for a library.

Targets may populate this property to publish the compile definitions
required to compile against the headers for the target.  Consuming
targets can add entries to their own COMPILE_DEFINITIONS property such
as $<TARGET_PROPERTY:foo,INTERFACE_COMPILE_DEFINITIONS> to use the
compile definitions specified in the interface of 'foo'.

This property also supports generator expressions.  See the
:manual:`cmake-generator-expressions(7)` manual for available expressions.