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Add a wasmtime settings command to print Cranelift settings.

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This commit adds the `wasmtime settings` command to print out available
Cranelift settings for a target (defaults to the host).

The compile command has been updated to remove the Cranelift ISA options in
favor of encouraging users to use `wasmtime settings` to discover what settings
are available.  This will reduce the maintenance cost for syncing the compile
command with Cranelift ISA flags.
This commit is contained in:
Peter Huene
2021-03-31 22:44:13 -07:00
parent a474524d3b
commit abf3bf29f9
16 changed files with 478 additions and 312 deletions
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15
src/lib.rs
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@@ -212,12 +212,19 @@ struct CommonOptions {
)]
opt_level: Option<wasmtime::OptLevel>,
/// Cranelift common flags to set.
#[structopt(long = "cranelift-set", value_name = "NAME=VALUE", parse(try_from_str = parse_cranelift_flag))]
/// Set a Cranelift setting to a given value.
/// Use `wasmtime settings` to list Cranelift settings for a target.
#[structopt(long = "cranelift-set", value_name = "NAME=VALUE", number_of_values = 1, verbatim_doc_comment, parse(try_from_str = parse_cranelift_flag))]
cranelift_set: Vec<(String, String)>,
/// The Cranelift boolean setting or preset to enable.
#[structopt(long, value_name = "SETTING")]
/// Enable a Cranelift boolean setting or preset.
/// Use `wasmtime settings` to list Cranelift settings for a target.
#[structopt(
long,
value_name = "SETTING",
number_of_values = 1,
verbatim_doc_comment
)]
cranelift_enable: Vec<String>,
/// Maximum size in bytes of wasm memory before it becomes dynamically