build: MinGW lacks d3d12

rpavlik · rpavlik · commit 7b7ba4a2e49b · 2020-03-04T16:11:49.000-06:00
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -176,6 +176,8 @@ endfunction()
 
 if(WIN32)
     add_definitions(-DXR_USE_GRAPHICS_API_D3D11)
+endif()
+if(MSVC)
     add_definitions(-DXR_USE_GRAPHICS_API_D3D12)
 endif()
 
