Reapply r229185(cbieneman) -- Raising minimum required Visual Studio …

…version to 2013.

This is based on the discussions on: [LLVMdev] [RFC] Raising LLVM minimum required MSVC version to 2013 for trunk

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229320 91177308-0d34-0410-b5e6-96231b3b80d8

CMakeLists.txt

@@ -24,6 +24,10 @@ endif()
 
 project(LLVM)
 
+if (MSVC AND MSVC_VERSION LESS 1800)
+  message(FATAL_ERROR "Minimum required MSVC version is 2013!")
+endif ()
+
 # The following only works with the Ninja generator in CMake >= 3.0.
 set(LLVM_PARALLEL_COMPILE_JOBS "" CACHE STRING
   "Define the maximum number of concurrent compilation jobs.")

cmake/modules/AddLLVM.cmake

@@ -584,12 +584,6 @@ function(add_unittest test_suite test_name)
     set(EXCLUDE_FROM_ALL ON)
   endif()
 
-  # Visual Studio 2012 only supports up to 8 template parameters in
-  # std::tr1::tuple by default, but gtest requires 10
-  if (MSVC AND MSVC_VERSION EQUAL 1700)
-    list(APPEND LLVM_COMPILE_DEFINITIONS _VARIADIC_MAX=10)
-  endif ()
-
   include_directories(${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include)
   if (NOT LLVM_ENABLE_THREADS)
     list(APPEND LLVM_COMPILE_DEFINITIONS GTEST_HAS_PTHREAD=0)

utils/unittest/CMakeLists.txt

@@ -32,12 +32,6 @@ if (NOT LLVM_ENABLE_THREADS)
   add_definitions( -DGTEST_HAS_PTHREAD=0 )
 endif()
 
-# Visual Studio 2012 only supports up to 8 template parameters in
-# std::tr1::tuple by default, but gtest requires 10
-if(MSVC AND MSVC_VERSION EQUAL 1700)
-  add_definitions(-D_VARIADIC_MAX=10)
-endif ()
-
 set(LIBS
   LLVMSupport # Depends on llvm::raw_ostream
 )