[PATCH] cmake: link statically against run-time on windows (use /MT instead of /MD)

[Hans Wennborg]

  Do the foreach thing to handle all flag variables.

Hi rnk,

http://llvm-reviews.chandlerc.com/D2157

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D2157?vs=5479&id=5481#toc

Files:
  cmake/modules/HandleLLVMOptions.cmake

Index: cmake/modules/HandleLLVMOptions.cmake
===================================================================
--- cmake/modules/HandleLLVMOptions.cmake
+++ cmake/modules/HandleLLVMOptions.cmake
@@ -5,6 +5,7 @@
 include(AddLLVMDefinitions)
 include(CheckCCompilerFlag)
 include(CheckCXXCompilerFlag)
+include(LLVMProcessSources)
 
 if( CMAKE_COMPILER_IS_GNUCXX )
   set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
@@ -40,6 +41,16 @@
   endif()
 endif()
 
+if(MSVC)
+  # Link release builds against the static runtime.
+  foreach(flag CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELWITHDEBINFO
+      CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_MINSIZEREL_INIT
+      CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_RELWITHDEBINFO
+      CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_MINSIZEREL_INIT)
+    llvm_replace_compiler_option("${flag}" "/MD" "/MT")
+  endforeach()
+endif()  
+
 if(WIN32)
   if(CYGWIN)
     set(LLVM_ON_WIN32 0)
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