From dc5d951b73c9118511e33b8b07f2e94c41a379e7 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Mon, 3 Jul 2023 22:45:23 +0200
Subject: common.cmake: bump default C++ standard

---
 .github/actions/build-example/action.yml | 5 ++++-
 .github/workflows/boost_toolsets.yml     | 2 ++
 common.cmake                             | 4 ++--
 examples/boost/CMakeLists.txt            | 2 +-
 examples/dynamic/CMakeLists.txt          | 2 +-
 examples/simple/CMakeLists.txt           | 2 +-
 examples/static/CMakeLists.txt           | 2 +-
 7 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/.github/actions/build-example/action.yml b/.github/actions/build-example/action.yml
index 63dd6b0..8d684c1 100644
--- a/.github/actions/build-example/action.yml
+++ b/.github/actions/build-example/action.yml
@@ -19,6 +19,9 @@ inputs:
     description: Configuration to build
     required: false
     default: Debug
+  cmake-args:
+    description: Additional CMake arguments
+    required: false
 outputs:
   install-dir:
     description: Installation directory
@@ -65,5 +68,5 @@ runs:
 
         $args += '--',$src_dir,'TMP'
         $env:VERBOSE = 1
-        & $python -m project.build $args
+        & $python -m project.build $args ${{ inputs.cmake-args }}
       shell: pwsh
diff --git a/.github/workflows/boost_toolsets.yml b/.github/workflows/boost_toolsets.yml
index 52c95bb..8c57a0a 100644
--- a/.github/workflows/boost_toolsets.yml
+++ b/.github/workflows/boost_toolsets.yml
@@ -166,6 +166,8 @@ jobs:
           toolset: '${{ matrix.toolset }}'
           platform: '${{ matrix.platform }}'
           configuration: '${{ matrix.configuration }}'
+          # Older Boosts don't like the newer standards (auto_ptr, etc.)
+          cmake-args: -D CC_CXX_STANDARD=14
 
       - name: Verify runtime library linkage
         uses: ./.github/actions/check-runtime-library
diff --git a/common.cmake b/common.cmake
index d47c80a..619b062 100644
--- a/common.cmake
+++ b/common.cmake
@@ -10,7 +10,7 @@
 # Add this to the top-level CMakeLists.txt (unless a higher version has already
 # been specified):
 #
-#     cmake_minimum_required(VERSION 3.1)
+#     cmake_minimum_required(VERSION 3.12)
 
 # Without this policy set, this line:
 #
@@ -54,7 +54,7 @@ if(parent_dir)
 endif()
 
 if(NOT DEFINED CC_CXX_STANDARD)
-    set(CC_CXX_STANDARD "14" CACHE STRING "C++ standard version")
+    set(CC_CXX_STANDARD "20" CACHE STRING "C++ standard version")
 endif()
 if(NOT DEFINED CC_BEST_PRACTICES)
     option(CC_BEST_PRACTICES "Set common compiler options" "${default_value}")
diff --git a/examples/boost/CMakeLists.txt b/examples/boost/CMakeLists.txt
index c4d5edb..bfb1f68 100644
--- a/examples/boost/CMakeLists.txt
+++ b/examples/boost/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5) # for Boost::* imported targets
+cmake_minimum_required(VERSION 3.12)
 
 project(example_boost)
 
diff --git a/examples/dynamic/CMakeLists.txt b/examples/dynamic/CMakeLists.txt
index 190b1c9..d4e0712 100644
--- a/examples/dynamic/CMakeLists.txt
+++ b/examples/dynamic/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.12)
 
 project(example_dynamic)
 
diff --git a/examples/simple/CMakeLists.txt b/examples/simple/CMakeLists.txt
index 268b5db..94810a4 100644
--- a/examples/simple/CMakeLists.txt
+++ b/examples/simple/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.12)
 
 project(example_simple)
 
diff --git a/examples/static/CMakeLists.txt b/examples/static/CMakeLists.txt
index e418aab..c5d77d3 100644
--- a/examples/static/CMakeLists.txt
+++ b/examples/static/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.12)
 
 project(example_static)
 
-- 
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