build: Windows does not imply MSVC

Author: rpavlik

src/tests/loader_test/CMakeLists.txt

@@ -41,8 +41,10 @@ if(VulkanHeaders_FOUND)
 endif()
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
-    target_compile_definitions(loader_test PRIVATE _CRT_SECURE_NO_WARNINGS)
-    target_compile_options(loader_test PRIVATE /Zc:wchar_t /Zc:forScope /W4 /WX)
+    if(MSVC)
+        target_compile_definitions(loader_test PRIVATE _CRT_SECURE_NO_WARNINGS)
+        target_compile_options(loader_test PRIVATE /Zc:wchar_t /Zc:forScope /W4 /WX)
+    endif()
     target_link_libraries(loader_test openxr_loader opengl32 d3d11)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
     target_compile_options(