bjoernager/rust
bjoernager/rust
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Update a few comments.

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This commit is contained in:
Mark Simulacrum 2017-06-27 13:24:37 -06:00
parent 6766abbfa9
commit 743af95d4b
2 changed files with 11 additions and 18 deletions
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15
src/bootstrap/bin/rustc.rs
View file

@ -75,16 +75,11 @@ fn main() {
Err(_) => 0,
};
// Build scripts always use the snapshot compiler which is guaranteed to be
// able to produce an executable, whereas intermediate compilers may not
// have the standard library built yet and may not be able to produce an
// executable. Otherwise we just use the standard compiler we're
// bootstrapping with.
//
// Also note that cargo will detect the version of the compiler to trigger
// a rebuild when the compiler changes. If this happens, we want to make
// sure to use the actual compiler instead of the snapshot compiler becase
// that's the one that's actually changing.
// Use a different compiler for build scripts, since there may not yet be a
// libstd for the real compiler to use. However, if Cargo is attempting to
// determine the version of the compiler, the real compiler needs to be
// used. Currently, these two states are differentiated based on whether
// --target and -vV is/isn't passed.
let (rustc, libdir) = if target.is_none() && version.is_none() {
("RUSTC_SNAPSHOT", "RUSTC_SNAPSHOT_LIBDIR")
} else {

14
src/bootstrap/lib.rs
View file

@ -175,7 +175,9 @@ pub struct Build {
lldb_python_dir: Option<String>,
// Runtime state filled in later on
// target -> (cc, ar)
cc: HashMap<String, (gcc::Tool, Option<PathBuf>)>,
// host -> (cc, ar)
cxx: HashMap<String, gcc::Tool>,
crates: HashMap<String, Crate>,
is_sudo: bool,
@ -202,20 +204,16 @@ struct Crate {
/// build system, with each mod generating output in a different directory.
#[derive(Clone, Copy, PartialEq, Eq)]
pub enum Mode {
/// This cargo is going to build the standard library, placing output in the
/// "stageN-std" directory.
/// Build the standard library, placing output in the "stageN-std" directory.
Libstd,
/// This cargo is going to build libtest, placing output in the
/// "stageN-test" directory.
/// Build libtest, placing output in the "stageN-test" directory.
Libtest,
/// This cargo is going to build librustc and compiler libraries, placing
/// output in the "stageN-rustc" directory.
/// Build librustc and compiler libraries, placing output in the "stageN-rustc" directory.
Librustc,
/// This cargo is going to build some tool, placing output in the
/// "stageN-tools" directory.
/// Build some tool, placing output in the "stageN-tools" directory.
Tool,
}