Update MinGW details in the README

Fixes #29649
This commit is contained in:
Steve Klabnik 2016-01-04 12:33:43 -05:00
parent 191ff2d8fd
commit 011a23e8bc

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@ -53,6 +53,16 @@ Read ["Installing Rust"] from [The Book].
### Building on Windows
There are two prominent ABIs in use on Windows: the native (MSVC) ABI used by
Visual Studio, and the GNU ABI used by the GCC toolchain. Which version of Rust
you need depends largely on what C/C++ libraries you want to interoperate with:
for interop with software produced by Visual Studio use the MSVC build of Rust;
for interop with GNU software built using the MinGW/MSYS2 toolchain use the GNU
build.
#### MinGW
[MSYS2](http://msys2.github.io/) can be used to easily build Rust on Windows:
1. Grab the latest MSYS2 installer and go through the installer.
@ -63,12 +73,15 @@ Read ["Installing Rust"] from [The Book].
```sh
# Update package mirrors (may be needed if you have a fresh install of MSYS2)
$ pacman -Sy pacman-mirrors
```
# Choose one based on platform:
# *** see the note below ***
$ pacman -S mingw-w64-i686-toolchain
$ pacman -S mingw-w64-x86_64-toolchain
Download [MinGW from
here](http://mingw-w64.org/doku.php/download/mingw-builds), and choose the
`threads=win32,exceptions=dwarf/seh` flavor when installing. After installing,
add its `bin` directory to your `PATH`. This is due to #28260, in the future,
installing from pacman should be just fine.
```
# Make git available in MSYS2 (if not already available on path)
$ pacman -S git
@ -84,16 +97,19 @@ Read ["Installing Rust"] from [The Book].
$ ./configure
$ make && make install
```
> ***Note:*** gcc versions >= 5 currently have issues building LLVM on Windows
> resulting in a segmentation fault when building Rust. In order to avoid this
> it may be necessary to obtain an earlier version of gcc such as 4.9.x.
> Msys's `pacman` will install the latest version, so for the time being it is
> recommended to skip gcc toolchain installation step above and use [Mingw-Builds]
> project's installer instead. Be sure to add gcc `bin` directory to the path
> before running `configure`.
> For more information on this see issue #28260.
[Mingw-Builds]: http://sourceforge.net/projects/mingw-w64/
#### 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. In addition, `cmake` needs to be installed to build LLVM.
With these dependencies installed, the build takes two steps:
```sh
$ ./configure
$ make && make install
```
## Building Documentation