SKIP_PRECOMPILE_HEADERS ----------------------- .. versionadded:: 3.16 Is this source file skipped by :prop_tgt:`PRECOMPILE_HEADERS` feature. This property helps with build problems that one would run into when using the :prop_tgt:`PRECOMPILE_HEADERS` feature. One example would be the usage of Objective-C (``*.m``) files, and Objective-C++ (``*.mm``) files, which lead to compilation failure because they are treated (in case of Ninja / Makefile generator) as C, and CXX respectively. The precompile headers are not compatible between languages.