[PATCH] D62171: build: Enable CMake Policy 0077

[Saleem Abdulrasool via Phabricator via llvm-commits]

compnerd created this revision.
compnerd added reviewers: beanz, smeenai.
Herald added a subscriber: mgorny.
Herald added a project: LLVM.

Enable CMake policy 77.  This alters the behavior of `option`.  The old behavior would remove the value of the option from the cache and create a new one.  The new behavior does not create the variable if it is defined already.  This ensures that subsequent reconfigures will behave identically.  This seems better than the setting of `OLD` - the desire is to ensure that it is set to `OLD` or `NEW`.


Repository:
  rL LLVM

https://reviews.llvm.org/D62171

Files:
  CMakeLists.txt


Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -11,6 +11,10 @@
   cmake_policy(SET CMP0075 NEW)
 endif()

+if(POLICY CMP0077)
+  cmake_plicy(SET CMP0077 NEW)
+endif()
+
 if(NOT DEFINED LLVM_VERSION_MAJOR)
   set(LLVM_VERSION_MAJOR 8)
 endif()


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