Reland "[CMake] Bumps minimum version to 3.20.0."
All build bots should be updated now.
This reverts commit 44d38022ab29a3156349602733b3459df5beef93.
GitOrigin-RevId: ffb807ab5375b3f78df198dc5d4302b3b552242f
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 536f11f..5d0f2cd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,14 +1,7 @@
# Check if this is a in tree build.
if (NOT DEFINED LLVM_MAIN_SRC_DIR)
project(Polly)
- cmake_minimum_required(VERSION 3.13.4)
- if ("${CMAKE_VERSION}" VERSION_LESS "3.20.0")
- message(WARNING
- "Your CMake version is ${CMAKE_VERSION}. Starting with LLVM 17.0.0, the "
- "minimum version of CMake required to build LLVM will become 3.20.0, and "
- "using an older CMake will become an error. Please upgrade your CMake to "
- "at least 3.20.0 now to avoid issues in the future!")
- endif()
+ cmake_minimum_required(VERSION 3.20.0)
set(POLLY_STANDALONE_BUILD TRUE)
endif()