c3.cmake

function(c3_always_full_rpath)
  # CMake RPATH "always full" configuration, see:
  # https://cmake.org/Wiki/CMake_RPATH_handling#Always_full_RPATH
  # use, i.e. don't skip the full RPATH for the build tree
  set(CMAKE_SKIP_BUILD_RPATH False PARENT_SCOPE)
  # when building, don't use the install RPATH already
  # (but later on when installing)
  set(CMAKE_BUILD_WITH_INSTALL_RPATH False PARENT_SCOPE)
  # the RPATH to be used when installing, but only if it's not a system directory
  list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES
       "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
  if("${isSystemDir}" STREQUAL "-1")
    set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib" PARENT_SCOPE)
  endif()
  # add the automatically determined parts of the RPATH
  # which point to directories outside the build tree to the install RPATH
  set(CMAKE_INSTALL_RPATH_USE_LINK_PATH True PARENT_SCOPE)
endfunction(c3_always_full_rpath)