clang: allow build on Windows with Visual C++

The CMake code will set HAVE_CLANG_REPL_SUPPORT to ON and the Visual C++
compiler will complain at linking a release build of clang-repl.exe due
to the number of symbols bigger than 65k.

This patchset allows setting HAVE_CLANG_REPL_SUPPORT to OFF and build
fine.

Change-Id: I10665ef13c7dfffb5e23c05475ac5f10de48b8ee
Reviewed-by: Eike Ziller <[email protected]>

Author: cristianadam

clang/CMakeLists.txt

@@ -402,7 +402,7 @@ CMAKE_DEPENDENT_OPTION(CLANG_PLUGIN_SUPPORT
 # If libstdc++ is statically linked, clang-repl needs to statically link libstdc++
 # itself, which is not possible in many platforms because of current limitations in
 # JIT stack. (more platforms need to be supported by JITLink)
-if(NOT LLVM_STATIC_LINK_CXX_STDLIB)
+if(NOT LLVM_STATIC_LINK_CXX_STDLIB AND NOT DEFINED HAVE_CLANG_REPL_SUPPORT)
   set(HAVE_CLANG_REPL_SUPPORT ON)
 endif()