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Documentation only: update tutorial to mention --lib only for single source files

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In the tutorial, use the crate_type attribute when discussing crate files that
are libraries, and only refer to the --lib files when talking about making a
single source file into a library.

Closes #2070.
This commit is contained in:
Tim Chevalier 2012-04-05 16:26:36 -07:00
parent b91c9f803d
commit fc7fc90adf
1 changed files with 7 additions and 4 deletions
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doc/tutorial.md
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@ -1686,6 +1686,7 @@ purpose, you create a `.rc` crate file, which references any number of
~~~~ {.ignore}
#[link(name = "farm", vers = "2.5", author = "mjh")];
#[crate_type = "lib"];
mod cow;
mod chicken;
mod horse;
@ -1694,7 +1695,9 @@ mod horse;
Compiling this file will cause `rustc` to look for files named
`cow.rs`, `chicken.rs`, `horse.rs` in the same directory as the `.rc`
file, compile them all together, and, depending on the presence of the
`--lib` switch, output a shared library or an executable.
`crate_type = "lib"` attribute, output a shared library or an executable.
(If the line `#[crate_type = "lib"];` was omitted, `rustc` would create an
executable.)
The `#[link(...)]` part provides meta information about the module,
which other crates can use to load the right module. More about that
@ -1717,9 +1720,9 @@ content to the `poultry` module itself.
## Using other crates
Having compiled a crate with `--lib`, you can use it in another crate
with a `use` directive. We've already seen `use std` in several of the
examples, which loads in the [standard library][std].
Having compiled a crate that contains the `#[crate_type = "lib"]` attribute,
you can use it in another crate with a `use` directive. We've already seen
`use std` in several of the examples, which loads in the [standard library][std].
[std]: http://doc.rust-lang.org/doc/std/index/General.html