chore: bump cmake_minimum_required to support cmake 4 build

.github/workflows/bsd.yml

@@ -48,7 +48,6 @@ jobs:
         if: ${{ matrix.vm_os == 'freebsd' }}
         env:
           BUILD_TYPE: ${{ matrix.build_type }}
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
           # GLBINDING: ${{ matrix.glbinding }} # TODO: Re-add if available
         uses: vmactions/[email protected]
         with:
@@ -80,4 +79,4 @@ jobs:
                                             # TODO: Uncomment whenever possible
             make -j3 VERBOSE=1
             make install DESTDIR="/tmp/supertux" VERBOSE=1
-            ./test_supertux2
+            ./test_supertux2

.github/workflows/gnulinux.yml

@@ -155,7 +155,6 @@ jobs:
           # FIXME: GoogleTest isn't detected by CMake on Ubuntu 18.04
           # (also check the step that invokes the tests with ./test_supertux2)
           TESTS: ${{ matrix.os == 'ubuntu-22.04' }}
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
         run: |
           cmake --version
           $CXX --version
@@ -169,8 +168,6 @@ jobs:
 
       - name: Build and install
         working-directory: build
-        env:
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
         run: |
           make -j3 VERBOSE=1
           make install DESTDIR="/tmp/supertux" VERBOSE=1

.github/workflows/macos.yml

@@ -84,7 +84,6 @@ jobs:
         env:
           BUILD_TYPE: ${{ matrix.build_type }}
           GLBINDING: ${{ matrix.glbinding }}
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
         run: |
           cmake --version
           $CXX --version
@@ -101,8 +100,6 @@ jobs:
                    -DINSTALL_SUBDIR_SHARE=share/supertux2
 
       - name: Build and install
-        env:
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
         working-directory: build
         run: |
           make -j3 VERBOSE=1

.github/workflows/scripting.yml

@@ -57,7 +57,7 @@ jobs:
           cmake --version
           mkdir build
           cd build
-          cmake .. -DBUILD_DOCUMENTATION_WITH_SCRIPTING=ON -DCMAKE_POLICY_VERSION_MINIMUM=3.5
+          cmake .. -DBUILD_DOCUMENTATION_WITH_SCRIPTING=ON
           make
 
       - name: Generate scripting reference

.github/workflows/wasm.yml

@@ -58,7 +58,7 @@ jobs:
           mkdir build
           cd build
           # TODO: Re-add -DWERROR=ON when warnings will be fixed
-          emcmake cmake -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DWARNINGS=ON -DCMAKE_POLICY_VERSION_MINIMUM=3.5 ..
+          emcmake cmake -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DWARNINGS=ON ..
 
       - name: Sync data folder
         working-directory: build

.github/workflows/windows.yml

@@ -84,7 +84,6 @@ jobs:
           ARCH: ${{ matrix.arch }}
           BUILD_TYPE: ${{ matrix.build_type }}
           GLBINDING: ${{ matrix.glbinding }}
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
         run: |
           cmake --version
           mkdir build
@@ -95,7 +94,6 @@ jobs:
         working-directory: build
         env:
           BUILD_TYPE: ${{ matrix.build_type }}
-          CMAKE_POLICY_VERSION_MINIMUM: 3.5
         run: |
           cmake --build . --config $Env:BUILD_TYPE
 

CMakeLists.txt

@@ -31,7 +31,7 @@
 #   make
 #
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 ## Project name to use as command prefix.
 

tools/scripting_docs_gen/CMakeLists.txt

@@ -14,7 +14,7 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.5)
 
 project(ScriptingDocsGen)
 set(CMAKE_CXX_STANDARD 17)