C++11 is now required.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207914
91177308-0d34-0410-b5e6-
96231b3b80d8
**LLVM_ENABLE_THREADS**:BOOL
Build with threads support, if available. Defaults to ON.
-**LLVM_ENABLE_CXX11**:BOOL
- Build in C++11 mode, if available. Defaults to OFF.
+**LLVM_ENABLE_CXX1Y**:BOOL
+ Build in C++1y mode, if available. Defaults to OFF.
**LLVM_ENABLE_ASSERTIONS**:BOOL
Enables code assertions. Defaults to OFF if and only if ``CMAKE_BUILD_TYPE``