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Clarify how rustup toolchain installation works on Windows #744

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Oct 5, 2016
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13 changes: 8 additions & 5 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -461,11 +461,14 @@ Command | Description
The primary installation method, as described at
[www.rustup.rs](https://www.rustup.rs), differs by platform:

* On Windows, download and run the [rustup-init.exe for the
`i686-pc-windows-gnu` target][setup]. Although this build of
`rustup` installs compilers targeting the GNU ABI by default,
compilers targeting the MSVC ABI can be installed with e.g. `rustup
install stable-msvc`.
* On Windows, download and run the [rustup-init.exe built for
`i686-pc-windows-gnu` target][setup]. Despite being built against the GNU
toolchain, _the Windows build of rustup will install Rust for the MSVC
toolchain if it detects that MSVC is installed_. If you prefer to install GNU
toolchains or x86_64 toolchains by default this can be modified at install
time, either interactively or with the `--default-host` flag, or after
installation via `rustup set default-host`. In general, this is the build
of rustup one should install on Windows.
* On Unix, run `curl https://sh.rustup.rs -sSf | sh` in your
shell. This downloads and runs [`rustup-init.sh`], which in turn
downloads and runs the correct version of the `rustup-init`
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