Downgrade required CMake to 3.16

We still want to build VS 2017 through AppVeyor, and those images have CMake 3.16.2 installed. We could install newer CMake as part of the build, but since we don't use newer CMake features yet, this is simpler.
catchorg · Jan 5, 2025 · 232e893 · 232e893
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commit 232e893
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Showing 7 changed files with 8 additions and 8 deletions.
diff --git a/.conan/test_package/CMakeLists.txt b/.conan/test_package/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 project(PackageTest CXX)
 
 find_package(Catch2 CONFIG REQUIRED)

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 
 # detect if Catch is being bundled,
 # disable testsuite in that case

diff --git a/docs/cmake-integration.md b/docs/cmake-integration.md
@@ -85,7 +85,7 @@ a target. This function works by running the resulting executable with
 
 #### Usage
 ```cmake
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 
 project(baz LANGUAGES CXX VERSION 0.0.1)
 
@@ -239,7 +239,7 @@ parsed are *silently ignored*.
 #### Usage
 
 ```cmake
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 
 project(baz LANGUAGES CXX VERSION 0.0.1)
 

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required( VERSION 3.20 )
+cmake_minimum_required( VERSION 3.16 )
 
 project( Catch2Examples LANGUAGES CXX )
 

diff --git a/tests/ExtraTests/CMakeLists.txt b/tests/ExtraTests/CMakeLists.txt
@@ -2,7 +2,7 @@
 # Build extra tests.
 #
 
-cmake_minimum_required( VERSION 3.20 )
+cmake_minimum_required( VERSION 3.16 )
 
 project( Catch2ExtraTests LANGUAGES CXX )
 

diff --git a/tests/TestScripts/DiscoverTests/CMakeLists.txt b/tests/TestScripts/DiscoverTests/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 
 project(discover-tests-test
   LANGUAGES CXX

diff --git a/tools/misc/CMakeLists.txt b/tools/misc/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 
 project(CatchCoverageHelper)