As a forewarning for anyone that might be forced to use MSVC / Visual Studio at their place of employment, LLVM developers are preparing to raise their compiler requirements for building out LLVM unless any old pre-2013 MSVC users raise their concerns.
Back in 2014
LLVM raised their host compiler requirements to GCC 4.7, Microsoft Visual Studio 2012, and Clang 3.1 so that the compiler developers could write more of the compiler itself in C++11. As the next step, LLVM developers are wanting to raise the MSVC / Visual Studio requirement to 2013.
In what would be a change for LLVM 3.7 and not the imminent LLVM 3.6 release is requiring MSVC version 2013 for building LLVM. LLVM developers know of no major users of MSVC 2012 left that are building LLVM so they are looking to raise the requirement and disable support for the 2012 version of Microsoft's compiler.
Windows stakeholders needing to learn more can read
this mailing list thread.
