[Openmp-commits] [PATCH] D82074: [OpenMP] Set cmake policy CMP0075 to NEW

[Joachim Protze via Phabricator via Openmp-commits]

protze.joachim created this revision.
protze.joachim added a reviewer: AndreyChurbanov.
protze.joachim added a project: OpenMP.
Herald added subscribers: sstefan1, guansong, yaxunl, mgorny.
Herald added a reviewer: jdoerfert.

Building with cmake 3.16, I get the following warning:

  CMake Warning (dev) at /usr/share/cmake-3.16/Modules/CheckIncludeFiles.cmake:120 (message):
    Policy CMP0075 is not set: Include file check macros honor
    CMAKE_REQUIRED_LIBRARIES.  Run "cmake --help-policy CMP0075" for policy
    details.  Use the cmake_policy command to set the policy and suppress this
    warning.
  
    CMAKE_REQUIRED_LIBRARIES is set to:
  
      m
  
    For compatibility with CMake 3.11 and below this check is ignoring it.
  Call Stack (most recent call first):
    /home/jprotze/OMPD/llvm-project/openmp/runtime/cmake/config-ix.cmake:223 (check_include_files)
    /home/jprotze/OMPD/llvm-project/openmp/runtime/CMakeLists.txt:223 (include)
  This warning is for project developers.  Use -Wno-dev to suppress it.

The `cmake_minimum_required` command in the OpenMP directory overwrites the policy setting of llvm. Also, we want to support stand-alone builds, so we should set the policy.

lldb introduced the same patch in : https://reviews.llvm.org/D58279


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D82074

Files:
  openmp/CMakeLists.txt


Index: openmp/CMakeLists.txt
===================================================================
--- openmp/CMakeLists.txt
+++ openmp/CMakeLists.txt
@@ -1,5 +1,9 @@
 cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
 
+if(POLICY CMP0075)
+  cmake_policy(SET CMP0075 NEW)
+endif()
+
 # Add cmake directory to search for custom cmake functions.
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
 


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