Revert my CMake patches concerning building with /MT (r194589, r194596)

Reid pointed out we already have LLVM_USE_CRT_{buildtype} to set it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194604 91177308-0d34-0410-b5e6-96231b3b80d8

CMakeLists.txt

@@ -17,8 +17,6 @@ set(PACKAGE_VERSION "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}svn")
 
 option(LLVM_INSTALL_TOOLCHAIN_ONLY "Only include toolchain files in the 'install' target." OFF)
 
-option(LLVM_STATIC_MSVC_RUNTIME "When using MSVC, link against the static run-time (/MT)" OFF)
-
 option(LLVM_USE_FOLDERS "Enable solution folders in Visual Studio. Disable for Express versions." ON)
 if ( LLVM_USE_FOLDERS )
   set_property(GLOBAL PROPERTY USE_FOLDERS ON)

cmake/modules/HandleLLVMOptions.cmake

@@ -5,7 +5,6 @@
 include(AddLLVMDefinitions)
 include(CheckCCompilerFlag)
 include(CheckCXXCompilerFlag)
-include(LLVMProcessSources)
 
 if( CMAKE_COMPILER_IS_GNUCXX )
   set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
@@ -41,18 +40,6 @@ else()
   endif()
 endif()
 
-if(MSVC AND LLVM_STATIC_MSVC_RUNTIME)
-  # Link against the static runtime.
-  foreach(flag CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELWITHDEBINFO
-      CMAKE_C_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELEASE
-      CMAKE_CXX_FLAGS_RELWITHDEBINFO CMAKE_CXX_FLAGS_MINSIZEREL)
-    llvm_replace_compiler_option("${flag}" "/MD" "/MT")
-  endforeach()
-  foreach(flag CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG)
-    llvm_replace_compiler_option("${flag}" "/MDd" "/MTd")
-  endforeach()
-endif()  
-
 if(WIN32)
   if(CYGWIN)
     set(LLVM_ON_WIN32 0)

docs/CMake.rst

@@ -280,11 +280,6 @@ LLVM-specific variables
   are ``Address``, ``Memory`` and ``MemoryWithOrigins``. Defaults to empty
   string.
 
-**LLVM_STATIC_MSVC_RUNTIME**:BOOL
-  When building with MSVC, link against the static runtime library (/MT or /MTd
-  for release and debug builds, respectively) instead of the dynamic one.
-  Defaults to OFF.
-
 Executing the test suite
 ========================