1 files changed, 39 insertions, 0 deletions
diff --git a/Modules/CMakeInitializeConfigs.cmake b/Modules/CMakeInitializeConfigs.cmake
new file mode 100644
index 0000000..9dfe040
--- /dev/null
+++ b/Modules/CMakeInitializeConfigs.cmake
@@ -0,0 +1,39 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+include_guard(GLOBAL)
+
+# Initializes `<_PREFIX>_<CONFIG>` variables from the corresponding
+# `<_PREFIX>_<CONFIG>_INIT`, for the configurations currently used.
+function(cmake_initialize_per_config_variable _PREFIX _DOCSTRING)
+  string(STRIP "${${_PREFIX}_INIT}" _INIT)
+  set("${_PREFIX}" "${_INIT}"
+    CACHE STRING "${_DOCSTRING} during all build types.")
+  mark_as_advanced("${_PREFIX}")
+
+  if (NOT CMAKE_NOT_USING_CONFIG_FLAGS)
+    set(_CONFIGS Debug Release MinSizeRel RelWithDebInfo)
+
+    get_property(_GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+    if (_GENERATOR_IS_MULTI_CONFIG)
+      list(APPEND _CONFIGS ${CMAKE_CONFIGURATION_TYPES})
+    else()
+      if (NOT CMAKE_NO_BUILD_TYPE)
+        set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE_INIT}" CACHE STRING
+          "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel ...")
+      endif()
+      list(APPEND _CONFIGS ${CMAKE_BUILD_TYPE})
+    endif()
+
+    list(REMOVE_DUPLICATES _CONFIGS)
+    foreach(_BUILD_TYPE IN LISTS _CONFIGS)
+      if (NOT "${_BUILD_TYPE}" STREQUAL "")
+        string(TOUPPER "${_BUILD_TYPE}" _BUILD_TYPE)
+        string(STRIP "${${_PREFIX}_${_BUILD_TYPE}_INIT}" _INIT)
+        set("${_PREFIX}_${_BUILD_TYPE}" "${_INIT}"
+          CACHE STRING "${_DOCSTRING} during ${_BUILD_TYPE} builds.")
+        mark_as_advanced("${_PREFIX}_${_BUILD_TYPE}")
+      endif()
+    endforeach()
+  endif()
+endfunction()