Index: compiler-rt/trunk/cmake/Modules/AddCompilerRT.cmake
===================================================================
--- compiler-rt/trunk/cmake/Modules/AddCompilerRT.cmake
+++ compiler-rt/trunk/cmake/Modules/AddCompilerRT.cmake
@@ -138,6 +138,12 @@
 
   # gtest use a lot of stuff marked as deprecated on Windows.
   list(APPEND COMPILER_RT_GTEST_CFLAGS -Wno-deprecated-declarations)
+
+  # Visual Studio 2012 only supports up to 8 template parameters in
+  # std::tr1::tuple by default, but gtest requires 10
+  if(MSVC_VERSION EQUAL 1700)
+    add_definitions(-D_VARIADIC_MAX=10)
+  endif()
 endif()
 
 # Link objects into a single executable with COMPILER_RT_TEST_COMPILER,