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Document the hook

This commit is contained in:
Laurent Rineau 2018-03-20 17:02:47 +01:00
parent 2d1cb94f5b
commit f3b4302a08
1 changed files with 11 additions and 0 deletions
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11
Installation/cmake/modules/CGAL_enable_end_of_configuration_hook.cmake
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@ -1,5 +1,16 @@
# This module install a hook (with `variable_watch()`) on CMAKE_CURRENT_LIST_DIR
#
# That uses the non-documented fact that CMAKE_CURRENT_LIST_DIR is cleared
# by CMake at the end of the configuration process. So, if the value of
# that variable gets empty, that means that CMake has reached the end of
# the configuration.
#
# See https://stackoverflow.com/a/43300621/1728537 for the starting point.
function(CGAL_run_at_the_end_of_configuration variable access value current_list_file stack) function(CGAL_run_at_the_end_of_configuration variable access value current_list_file stack)
if(NOT access STREQUAL "MODIFIED_ACCESS" OR value) if(NOT access STREQUAL "MODIFIED_ACCESS" OR value)
# Only do something at the end of the CMake process, when the value of
# variable CMAKE_CURRENT_LIST_DIR is changed to the empty string.
return() return()
endif() endif()
# Warn when CMAKE_BUILD_TYPE is empty or Debug # Warn when CMAKE_BUILD_TYPE is empty or Debug