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Auto merge of #104 - alexcrichton:more-readme-updates, r=japaric 

More readme updates
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@ -1,10 +1,7 @@
[![AppVeyor][appveyor]](https://ci.appveyor.com/project/japaric/rustc-builtins)
[![Travis][travis]](https://travis-ci.org/japaric/rustc-builtins)
# `compiler-builtins`
[appveyor]: https://ci.appveyor.com/api/projects/status/mofi55r3px9pv3o7?svg=true
[travis]: https://travis-ci.org/japaric/rustc-builtins.svg?branch=master
# `rustc-builtins`
[![Build status](https://ci.appveyor.com/api/projects/status/eusnjps5ui3d305p?svg=true)](https://ci.appveyor.com/project/rust-lang-libs/compiler-builtins)
[![Build Status](https://travis-ci.org/rust-lang-nursery/compiler-builtins.svg?branch=master)](https://travis-ci.org/rust-lang-nursery/compiler-builtins)
> [WIP] Porting `compiler-rt` intrinsics to Rust
@ -23,15 +20,26 @@ this crate ends up, as long as it's there):
``` toml
[dependencies]
rustc-builtins = { git = "https://github.com/japaric/rustc-builtins" }
compiler-builtins = { git = "https://github.com/rustc-lang-nursery/compiler-builtins" }
```
If you still get an "undefined reference to $INTRINSIC" error after that change, that means that we
haven't ported `$INTRINSIC` to Rust yet! Please open [an issue] with the name of the intrinsic and
the LLVM triple (e.g. thumbv7m-none-eabi) of the target you are using. That way we can prioritize
If you still get an "undefined reference to $INTRINSIC" error after that change,
that means that we haven't ported `$INTRINSIC` to Rust yet! Please open [an
issue] with the name of the intrinsic and the LLVM triple (e.g.
thumbv7m-none-eabi) of the target you are using. That way we can prioritize
porting that particular intrinsic.
[an issue]: https://github.com/japaric/rustc-builtins/issues
If you've got a C compiler available for your target then while we implement
this intrinsic you can temporarily enable a fallback to the actual compiler-rt
implementation as well for unimplemented intrinsics:
```toml
[dependencies.compiler-builtins]
git = "https://github.com/rustc-lang-nursery/compiler-builtins"
features = ["c"]
```
[an issue]: https://github.com/rust-lang-nursery/compiler-builtins/issues
## Contributing
@ -45,7 +53,7 @@ porting that particular intrinsic.
[1]: https://github.com/rust-lang/compiler-rt/tree/8598065bd965d9713bfafb6c1e766d63a7b17b89/test/builtins/Unit
[2]: https://github.com/rust-lang/compiler-rt/tree/8598065bd965d9713bfafb6c1e766d63a7b17b89/lib/builtins
[3]: https://travis-ci.org/japaric/rustc-builtins
[3]: https://travis-ci.org/rust-lang-nursery/compiler-builtins
### Porting Reminders