Workaround a bug in implementation of variadic templates in MSVC11

CMakeLists.txt

@@ -152,12 +152,13 @@ endif ()
 #  add_definitions(-DFMT_USE_STATIC_ASSERT=1)
 #endif ()
 
-check_cxx_source_compiles("
-  #include <tuple>
-  int main(){ std::tuple<int, double> t; }" FMT_TUPLE)
+# Workaround a bug in implementation of variadic templates in MSVC11.
+if (MSVC)
+  target_compile_definitions(gmock PUBLIC _VARIADIC_MAX=10)
+endif ()
 
 # GTest doesn't detect <tuple> with clang.
-if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR NOT FMT_TUPLE)
+if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   target_compile_definitions(gmock PUBLIC GTEST_USE_OWN_TR1_TUPLE=1)
 endif ()