CMP0151

New in version 3.27.

AUTOMOC include directory is a system include directory by default.

Headers generated for AUTOMOC are placed in target-specific include directories. CMake 3.26 and older added these as normal include directories. CMake 3.27 and newer prefer to add them as system include directories. This policy provides compatibility for projects that have not been updated to expect this.

If the AUTOGEN_USE_SYSTEM_INCLUDE target property is set, perhaps via the CMAKE_AUTOGEN_USE_SYSTEM_INCLUDE variable, then its value is used regardless of the setting of this policy.

The OLD behavior for this policy is to add autogen include directory to the target's include directories. The NEW behavior for this policy is to add autogen include directory to the target's system include directories.

This policy was introduced in CMake version 3.27. Use the cmake_policy() command to set it to OLD or NEW explicitly. Unlike many policies, CMake version 3.27.9 does not warn when this policy is not set and simply uses OLD behavior.

Note

The OLD behavior of a policy is deprecated by definition and may be removed in a future version of CMake.