[CMake] Remove dead code setting policies to NEW

cmake_minimum_required(VERSION) calls cmake_policy(VERSION),
which sets all policies up to VERSION to NEW.
LLVM started requiring CMake 3.13 last year, so we can remove
a bunch of code setting policies prior to 3.13 to NEW as it
no longer has any effect.

Reviewed By: phosek, #libunwind, #libc, #libc_abi, ldionne

Differential Revision: https://reviews.llvm.org/D94374

diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index f1e5a39..9e74014 100644 (file)
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -1,9 +1,5 @@
 cmake_minimum_required(VERSION 3.13.4)
 
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
 # If we are not building as a part of LLVM, build Clang as an
 # standalone project, using LLVM as an external library:
 if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )

diff --git a/compiler-rt/CMakeLists.txt b/compiler-rt/CMakeLists.txt
index 30302c2..b44ad2c 100644 (file)
--- a/compiler-rt/CMakeLists.txt
+++ b/compiler-rt/CMakeLists.txt
@@ -5,10 +5,6 @@
 
 cmake_minimum_required(VERSION 3.13.4)
 
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
 # Check if compiler-rt is built as a standalone project.
 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR COMPILER_RT_STANDALONE_BUILD)
   project(CompilerRT C CXX ASM)

diff --git a/flang/CMakeLists.txt b/flang/CMakeLists.txt
index 07d3435..79aa538 100644 (file)
--- a/flang/CMakeLists.txt
+++ b/flang/CMakeLists.txt
@@ -1,20 +1,6 @@
 cmake_minimum_required(VERSION 3.13.4)
 
-# RPATH settings on macOS do not affect INSTALL_NAME.
-if (POLICY CMP0068)
-  cmake_policy(SET CMP0068 NEW)
-  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
-endif()
-
-# Include file check macros honor CMAKE_REQUIRED_LIBRARIES.
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
-# option() honors normal variables.
-if (POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif()
+set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
 
 option(LINK_WITH_FIR "Link driver with FIR and LLVM" ON)
 option(FLANG_BUILD_NEW_DRIVER "Build the flang compiler driver" OFF)

diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
index f4c7e99..46a6695 100644 (file)
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -10,16 +10,7 @@ endif()
 #===============================================================================
 cmake_minimum_required(VERSION 3.13.4)
 
-if(POLICY CMP0042)
-  cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
-endif()
-if(POLICY CMP0022)
-  cmake_policy(SET CMP0022 NEW) # Required when interacting with LLVM and Clang
-endif()
-if(POLICY CMP0068)
-  cmake_policy(SET CMP0068 NEW)
-  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
-endif()
+set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
 
 # Add path for custom modules
 set(CMAKE_MODULE_PATH

diff --git a/libcxx/utils/ci/runtimes/CMakeLists.txt b/libcxx/utils/ci/runtimes/CMakeLists.txt
index 20980b5..ab4182a 100644 (file)
--- a/libcxx/utils/ci/runtimes/CMakeLists.txt
+++ b/libcxx/utils/ci/runtimes/CMakeLists.txt
@@ -1,20 +1,8 @@
 cmake_minimum_required(VERSION 3.13.4)
-
-if(POLICY CMP0068)
-  cmake_policy(SET CMP0068 NEW)
-  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
-endif()
-
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
-if(POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif()
-
 project(LLVM_RUNTIMES)
 
+set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
+
 find_package(Python3 COMPONENTS Interpreter)
 if(NOT Python3_Interpreter_FOUND)
   message(WARNING "Python3 not found, using python2 as a fallback")

diff --git a/libcxxabi/CMakeLists.txt b/libcxxabi/CMakeLists.txt
index 146749f..c8ab9d7 100644 (file)
--- a/libcxxabi/CMakeLists.txt
+++ b/libcxxabi/CMakeLists.txt
@@ -10,10 +10,6 @@ endif()
 
 cmake_minimum_required(VERSION 3.13.4)
 
-if(POLICY CMP0042)
-  cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
-endif()
-
 # Add path for custom modules
 set(CMAKE_MODULE_PATH
   "${CMAKE_CURRENT_SOURCE_DIR}/cmake"

diff --git a/libunwind/CMakeLists.txt b/libunwind/CMakeLists.txt
index e344263..8ae32fb 100644 (file)
--- a/libunwind/CMakeLists.txt
+++ b/libunwind/CMakeLists.txt
@@ -8,10 +8,6 @@ endif()
 
 cmake_minimum_required(VERSION 3.13.4)
 
-if (POLICY CMP0042)
-  cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
-endif()
-
 # Add path for custom modules
 set(CMAKE_MODULE_PATH
   "${CMAKE_CURRENT_SOURCE_DIR}/cmake"

diff --git a/lldb/CMakeLists.txt b/lldb/CMakeLists.txt
index 1132905..b5633e2 100644 (file)
--- a/lldb/CMakeLists.txt
+++ b/lldb/CMakeLists.txt
@@ -1,13 +1,5 @@
 cmake_minimum_required(VERSION 3.13.4)
 
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
-if(POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif()
-
 # Add path for custom modules.
 set(CMAKE_MODULE_PATH
   ${CMAKE_MODULE_PATH}

diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 26a7029..454ec56 100644 (file)
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -2,18 +2,7 @@
 
 cmake_minimum_required(VERSION 3.13.4)
 
-if(POLICY CMP0068)
-  cmake_policy(SET CMP0068 NEW)
-  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
-endif()
-
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
-if(POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif()
+set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
 
 if(NOT DEFINED LLVM_VERSION_MAJOR)
   set(LLVM_VERSION_MAJOR 12)

diff --git a/mlir/examples/standalone/CMakeLists.txt b/mlir/examples/standalone/CMakeLists.txt
index 45dc808..fc42e3e 100644 (file)
--- a/mlir/examples/standalone/CMakeLists.txt
+++ b/mlir/examples/standalone/CMakeLists.txt
@@ -1,20 +1,8 @@
 cmake_minimum_required(VERSION 3.13.4)
-
-if(POLICY CMP0068)
-  cmake_policy(SET CMP0068 NEW)
-  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
-endif()
-
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
-if(POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif()
-
 project(standalone-dialect LANGUAGES CXX C)
 
+set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
+
 set(CMAKE_CXX_STANDARD 14 CACHE STRING "C++ standard to conform to")
 
 find_package(MLIR REQUIRED CONFIG)