Update appveyor.yml

appveyor.yml

@@ -4,20 +4,28 @@ environment:
   matrix:
   - GENERATOR: '"MinGW Makefiles"'
     BUILD_TYPE: Debug
+    WCHAR: 'OFF'
   - GENERATOR: '"MSYS Makefiles"'
     BUILD_TYPE: Release
+    WCHAR: 'OFF'
   - GENERATOR: '"Visual Studio 14 2015"'
     BUILD_TYPE: Debug
+    WCHAR: 'OFF'
   - GENERATOR: '"Visual Studio 14 2015"'
     BUILD_TYPE: Release
+    WCHAR: 'ON'
   - GENERATOR: '"Visual Studio 14 2015 Win64"'
     BUILD_TYPE: Debug
+    WCHAR: 'ON'
   - GENERATOR: '"Visual Studio 14 2015 Win64"'
     BUILD_TYPE: Release
+    WCHAR: 'ON'
   - GENERATOR: '"Visual Studio 15 2017 Win64"'
     BUILD_TYPE: Debug
+    WCHAR: 'ON'
   - GENERATOR: '"Visual Studio 15 2017 Win64"'
     BUILD_TYPE: Release
+    WCHAR: 'ON'
 build_script:
 - cmd: >-
     set
@@ -30,7 +38,7 @@ build_script:
 
     set PATH=C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw32\bin;C:\msys64\usr\bin;%PATH% 
     
-    cmake .. -G %GENERATOR% -D_WIN32 -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DSPDLOG_WCHAR_SUPPORT=ON -DSPDLOG_BUILD_EXAMPLE=ON -DSPDLOG_BUILD_EXAMPLE_HO=ON -DSPDLOG_BUILD_TESTS=ON -DSPDLOG_BUILD_TESTS_HO=OFF
+    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DSPDLOG_WCHAR_SUPPORT=%WCHAR% -DSPDLOG_BUILD_EXAMPLE=ON -DSPDLOG_BUILD_EXAMPLE_HO=ON -DSPDLOG_BUILD_TESTS=ON -DSPDLOG_BUILD_TESTS_HO=OFF
 
     cmake --build . --config %BUILD_TYPE%