About this repository

• Uses standard core etc.
• Provides a minimal self-hosted std (see https://doc.rust-lang.org/book/no-stdlib.html)
• Our std referenced via stage=1 in Xargo.toml (see japaric/xargo#117)

Three projects, each with their own Cargo.toml:

1. std_dep. Depends only on core. Represents some low-level OS dependency that std builds on.
2. std. Depends on core and std_dep. Represents the real Rust std.
3. app. Depends on core, std_dep and std. Represents a real app.

Replacement of std is enabled via app/Xargo.toml:

[dependencies]
core = { }
std = { path = "../libstd", stage = 1 }

How to build

1. cargo install xargo

2. cd app

3. xargo build

    Compiling core v0.0.0 (file:///$HOME/.rustup/toolchains/nightly-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore)
     Finished release [optimized] target(s) in 14.55 secs
    Compiling std_dep v0.1.0 (file:///$REPO/libstd_dep)
    Compiling std v0.1.0 (file:///$REPO/libstd)
     Finished release [optimized] target(s) in 0.19 secs
    Compiling libc v0.2.23
    Compiling std_dep v0.1.0 (file:///$REPO/libstd_dep)
    Compiling app v0.1.0 (file:///$REPO/app)
     Finished dev [unoptimized + debuginfo] target(s) in 1.34 secs