[CMake] Boost + CMake + Windows + Sanity -> Possible?

[Mateusz Loskot]

On 7 August 2018 at 18:15, Wheeler, Gavin <gavin.wheeler at kcl.ac.uk> wrote:
> [...]
> 1.       Look in C:\Program
> Files\CMake\share\cmake-3.9\Modules\FindBoost.cmake

Rule #1: never use CMake older than the latest release!

Rule #2: if you die hard for old CMake, force use of the latest FindBoost.cmake

if (CMAKE_VERSION VERSION_LESS 3.12)
  if (NOT EXISTS "${CMAKE_BINARY_DIR}/cmake/FindBoost.cmake")
    message(STATUS "You are using CMake older than 3.10")
    message(STATUS "FindBoost.cmake has likely been updated to detect
newer or even not yet released Boost")
    message(STATUS "Downloading FindBoost.cmake from
https://gitlab.kitware.com/cmake/ release branch")
    message(STATUS "The auto-download can be disabled with
GIL_DISABLE_FINDBOOST_DOWNLOAD=ON")
    file(DOWNLOAD
      "https://gitlab.kitware.com/cmake/cmake/raw/release/Modules/FindBoost.cmake"
      "${CMAKE_BINARY_DIR}/cmake/FindBoost.cmake")
  endif()
  list(INSERT CMAKE_MODULE_PATH 0 ${CMAKE_BINARY_DIR}/cmake)
endif()


The rules work most of the time, unless a lil' bug sneaks in eg.

https://gitlab.kitware.com/cmake/cmake/merge_requests/1731
https://gitlab.kitware.com/cmake/cmake/issues/17701

Remember, FindBoost.cmake is *always* a step or two behind CMake release.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net