Minor cmake update (#185)

CMakeLists.txt

@@ -83,7 +83,7 @@ install(FILES "${CMAKE_CURRENT_BINARY_DIR}/DirectXMath.pc"
         DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 
 #--- Test suite
-if (DEFINED VCPKG_TARGET_ARCHITECTURE)
+if(DEFINED VCPKG_TARGET_ARCHITECTURE)
     set(DXMATH_ARCHITECTURE ${VCPKG_TARGET_ARCHITECTURE})
 elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Ww][Ii][Nn]32$")
     set(DXMATH_ARCHITECTURE x86)
@@ -93,7 +93,15 @@ elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]$")
     set(DXMATH_ARCHITECTURE arm)
 elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]64$")
     set(DXMATH_ARCHITECTURE arm64)
-elseif(NOT DXMATH_ARCHITECTURE)
+elseif(CMAKE_VS_PLATFORM_NAME_DEFAULT MATCHES "^[Ww][Ii][Nn]32$")
+    set(DXMATH_ARCHITECTURE x86)
+elseif(CMAKE_VS_PLATFORM_NAME_DEFAULT MATCHES "^[Xx]64$")
+    set(DXMATH_ARCHITECTURE x64)
+elseif(CMAKE_VS_PLATFORM_NAME_DEFAULT MATCHES "^[Aa][Rr][Mm]$")
+    set(DXMATH_ARCHITECTURE arm)
+elseif(CMAKE_VS_PLATFORM_NAME_DEFAULT MATCHES "^[Aa][Rr][Mm]64$")
+    set(DXMATH_ARCHITECTURE arm64)
+elseif(NOT (DEFINED DXMATH_ARCHITECTURE))
     set(DXMATH_ARCHITECTURE "x64")
 endif()