cmake: use correct stack size with gnu mode clang on windows

CompileFlags.cmake

@@ -21,6 +21,12 @@ if(MSVC)
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
 endif()
 
+if(CMAKE_CXX_COMPILER_ID STREQUAL Clang
+   AND "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC"
+   AND "x${CMAKE_CXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
+  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Xlinker -stack:20000000")
+endif()
+
 #silence duplicate symbol warnings on AIX
 if(CMAKE_SYSTEM_NAME MATCHES "AIX")
   if(NOT CMAKE_COMPILER_IS_GNUCXX)