ignore most warnings in appveyor
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a96467a..f4bc002 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,12 +10,19 @@
set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/cmake)
set(CMAKE_BUILD_TYPE Debug)
# set(CMAKE_BUILD_TYPE Release)
# set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
+if (CMAKE_COMPILER_IS_GNUCC)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+endif()
+
+if (MSVC)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+endif()
+
add_library(inja INTERFACE)
target_include_directories(inja INTERFACE include)
