Fix Windows ARM64 support with regards to Mesa 3D

- Only fail the Mesa 3D arch check, if it's been enabled
- Add a cross-compilation CI job for Windows ARM64
- Fix ARM64 architecture detection for the Ninja generator

.github/workflows/ci.yml

@@ -32,6 +32,7 @@ jobs:
         - { name: Windows VS2019 x64,             os: windows-2019, flags: -DSFML_USE_MESA3D=ON -GNinja }
         - { name: Windows VS2022 x86,             os: windows-2022, flags: -DSFML_USE_MESA3D=ON -GNinja }
         - { name: Windows VS2022 x64,             os: windows-2022, flags: -DSFML_USE_MESA3D=ON -GNinja }
+        - { name: Windows VS2022 arm64,           os: windows-2022, flags: -DSFML_USE_MESA3D=OFF -GNinja -DSFML_BUILD_TEST_SUITE=OFF }
         - { name: Windows VS2022 ClangCL MSBuild, os: windows-2022, flags: -DSFML_USE_MESA3D=ON -T ClangCL } # ninja doesn't support specifying the toolset, so use the ClangCL toolset to test building with MSBuild as well
         - { name: Windows VS2022 OpenGL ES,       os: windows-2022, flags: -DSFML_USE_MESA3D=ON -DSFML_OPENGL_ES=ON -GNinja }
         - { name: Windows VS2022 Unity,           os: windows-2022, flags: -DSFML_USE_MESA3D=ON -DCMAKE_UNITY_BUILD=ON -GNinja }
@@ -117,7 +118,7 @@ jobs:
       if: contains(matrix.platform.name, 'Windows VS') && !contains(matrix.platform.name, 'MSBuild')
       uses: ilammy/msvc-dev-cmd@v1
       with:
-        arch: ${{ contains(matrix.platform.name, 'x86') && 'x86' || 'x64' }}
+        arch: ${{ contains(matrix.platform.name, 'arm64') && 'amd64_arm64' || contains(matrix.platform.name, 'x86') && 'x86' || 'x64' }}
 
     # Although the CMake configuration will run with 3.24 on Windows and 3.22
     # elsewhere, we install 3.25 on Windows in order to support specifying
@@ -237,7 +238,7 @@ jobs:
         find build/bin -name test-sfml-window -or -name test-sfml-window.exe -exec sh -c "{} *sf::Context* --section=\"Version String\" --success | grep OpenGL" \;
 
     - name: Test (Windows)
-      if: runner.os == 'Windows' && !contains(matrix.platform.name, 'MinGW')
+      if: runner.os == 'Windows' && !contains(matrix.platform.name, 'MinGW') && !contains(matrix.platform.name, 'arm64')
       run: cmake --build build --target runtests --config ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }}
 
     - name: Test (Linux/macOS/MinGW)
@@ -291,7 +292,7 @@ jobs:
           ctest --test-dir build --output-on-failure -C ${{ matrix.type.name == 'Debug' && 'Debug' || 'Release' }} --repeat until-pass:3
 
     - name: Upload Coverage Report to Coveralls
-      if: matrix.type.name == 'Debug' && github.repository == 'SFML/SFML' && !contains(matrix.platform.name, 'iOS') && !contains(matrix.platform.name, 'Android') # Disable upload in forks
+      if: matrix.type.name == 'Debug' && github.repository == 'SFML/SFML' && !contains(matrix.platform.name, 'iOS') && !contains(matrix.platform.name, 'Android')  && !contains(matrix.platform.name, 'arm64') # Disable upload in forks
       uses: coverallsapp/github-action@v2
       with:
         file: ./build/coverage.out

cmake/Config.cmake

@@ -6,9 +6,7 @@ if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
     set(OPENGL_ES 0)
 
     # detect the architecture
-    if(${CMAKE_GENERATOR_PLATFORM} MATCHES "ARM64")
-        set(ARCH_ARM64 1)
-    elseif("${CMAKE_GENERATOR_PLATFORM}" STREQUAL "" AND ${CMAKE_SYSTEM_PROCESSOR} MATCHES "ARM64")
+    if("${CMAKE_GENERATOR_PLATFORM}" MATCHES "ARM64" OR "${MSVC_CXX_ARCHITECTURE_ID}" MATCHES "ARM64" OR "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "ARM64")
         set(ARCH_ARM64 1)
     elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
         set(ARCH_X86 1)

cmake/Mesa3D.cmake

@@ -4,11 +4,11 @@ set(MESA3D_SHA256 "FEF8A643689414A70347AE8027D24674DEFD85E8D6428C8A9D4145BB3F44A
 get_filename_component(MESA3D_ARCHIVE "${MESA3D_URL}" NAME)
 get_filename_component(MESA3D_ARCHIVE_DIRECTORY "${MESA3D_URL}" NAME_WLE)
 
-if(${ARCH_X64})
+if(ARCH_X64)
     set(MESA3D_ARCH "x64")
-elseif(${ARCH_X86})
+elseif(ARCH_X86)
     set(MESA3D_ARCH "x86")
-else()
+elseif(SFML_USE_MESA3D)
     message(FATAL_ERROR "Mesa 3D does currently not support the target architecture.")
 endif()
 
@@ -61,7 +61,7 @@ if(SFML_OS_WINDOWS AND SFML_USE_MESA3D)
     add_custom_target(install-mesa3d DEPENDS ${MESA3D_INSTALLED_FILES})
 
     set_target_properties(install-mesa3d PROPERTIES EXCLUDE_FROM_ALL ON)
-elseif(SFML_OS_WINDOWS AND EXISTS "${MESA3D_ARCH_PATH}")
+elseif(SFML_OS_WINDOWS AND MESA3D_ARCH AND EXISTS "${MESA3D_ARCH_PATH}")
     # we are removing the files
 
     # compile a list of file names that we have to remove