Use newer CMake

.github/workflows/cuda.yml

@@ -29,7 +29,7 @@ jobs:
 
       - name: Install Packages
         run: |
-          sudo apt-get install -y cmake make wget
+          sudo apt-get install -y wget
 
       - name: Install CUDA
         run: |
@@ -41,6 +41,18 @@ jobs:
           echo "LD_LIBRARY_PATH=/usr/local/cuda-12.6/lib64:${LD_LIBRARY_PATH}" >> $GITHUB_ENV
           echo "CUDA_PATH=/usr/local/cuda-12.6" >> $GITHUB_ENV
 
+      - name: Install CMake
+        run: |
+          wget https://github.com/Kitware/CMake/releases/download/v3.24.0/cmake-3.24.0-linux-x86_64.sh
+          chmod +x cmake-3.24.0-linux-x86_64.sh
+          sudo mkdir -p /opt/cmake
+          sudo ./cmake-3.24.0-linux-x86_64.sh --prefix=/opt/cmake --skip-license
+          sudo rm -f /usr/local/bin/cmake
+          sudo ln -s /opt/cmake/bin/cmake /usr/local/bin/cmake
+
+      - name: Verify CMake version
+        run: cmake --version
+
       - name: Setup Boost
         run: |
           echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY

CMakeLists.txt

@@ -4,7 +4,7 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt
 
-cmake_minimum_required(VERSION 3.18)
+cmake_minimum_required(VERSION 3.24)
 
 project(boost_crypt VERSION 1.0.0 LANGUAGES CXX)
 
@@ -18,12 +18,8 @@ if(BOOST_CRYPT_ENABLE_CUDA)
 
     enable_language(CUDA)
 
-    # Let CMake think we want "CUDA17" so it won't fail:
-    #set(CMAKE_CUDA_STANDARD 17)
-    #set(CMAKE_CUDA_STANDARD_REQUIRED ON)
-
-    # But actually pass C++20 to NVCC:
-    set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} --std=c++20")
+    set(CMAKE_CUDA_STANDARD 20)
+    set(CMAKE_CUDA_STANDARD_REQUIRED ON)
 
     set(CMAKE_CUDA_EXTENSIONS OFF)