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README: Mention MSVC 2017+, not 2013(!) 

LLVM will soon require 2017+ [1] (and our in-tree version just rejected the version of 2015 I was using), so update the mention and provide a link.

[1]: https://llvm.org/docs/GettingStarted.html#host-c-toolchain-both-compiler-and-standard-library
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Scott McMurray 2019-05-13 21:54:47 -07:00
parent a9ec99f420
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@ -128,9 +128,15 @@ build.
#### MSVC
[windows-msvc]: #windows-msvc
MSVC builds of Rust additionally require an installation of Visual Studio 2013
(or later) so `rustc` can use its linker. Make sure to check the “C++ tools”
option.
MSVC builds of Rust additionally require an installation of Visual Studio 2017
(or later) so `rustc` can use its linker. The simplest way is to get the
[Visual Studio Build Tools] and check the “C++ build tools” workload.
[Visual Studio Build Tools]: https://visualstudio.microsoft.com/downloads/#build-tools-for-visual-studio-2019
At last check (cmake 3.14.3 and msvc 16.0.3) using the 2019 tools fails to
build the in-tree LLVM build with a CMake error, so use 2017 instead by
including the “MSVC v141 – VS 2017 C++ x64/x86 build tools (v14.16)” component.
With these dependencies installed, you can build the compiler in a `cmd.exe`
shell with: