I have a software project with a dated CMake-based build system that specifically set CMP0022 to OLD. So while updating that build system I naturally consulted the latest CMP0022 documentation, e.g., <https://cmake.org/cmake/help/git-stage/policy/CMP0022.html>, and discovered that documentation was outdated, e.g., lots of historical references to CMake-2.8 which are likely no longer needed, and the following recommendation
Warning-free future-compatible code which works with CMake 2.8.7 onwards can be written by using the LINK_PRIVATE and LINK_PUBLIC keywords of target_link_libraries(). (The obvious problem with that advice is that LINK_PRIVATE and LINK_PUBLIC are now deprecated themselves!) IF cmake-4 is coming soon and presuming that CMP0022 OLD behaviour will no longer be supported by that version of cmake, then you may not want to do anything about this outdated documentation since it will be removed with cmake-4. But otherwise for current needs like mine (updating an old build system that specifically set CMP0022 to OLD) a complete rewrite would be a good idea with the emphasis on simplifying down to one or two sentences such as Support for CMP0022 OLD behaviour is scheduled for removal with cmake-4 [if that decision has indeed already been made] so do not set this policy to OLD for new build systems. But if you need to know details about CMP0022 OLD behaviour in order to upgrade an old build system that currently requires the OLD version of this policy, see the target_link_libraries() documentation. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.sf.net); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake-developers
