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Use Cargo's "namespace features" feature (#4293)

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Cargo recently added the ability to have an optional dependency without
implicitly introducing a new named feature on a crate. This is triggered
with some new directives in the `[features]` section, specifically:

* The `dep:foo` syntax means that `foo` is activated but no implicit
  feature should be added named `foo`.

* Additionally `foo?/bar` means that the `bar` feature of `foo` is only
  activated if `foo` is otherwise activated elsewhere, for example a
  conditional activation.

These two features can help avoid extra feature names showing up that we
don't want (e.g. currently the `wasmtime` crate has a `rayon` feature)
and additionally can help avoid runtime dependencies in niche cases for
us (e.g. activating `all-arch` but disabling `cranelift` would
previously pull-in cranelift but no longer will).
This commit is contained in:
Alex Crichton
2022-06-21 15:05:14 -05:00
committed by GitHub
parent b2e03ae873
commit 2f9d96cd00
2 changed files with 7 additions and 7 deletions
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4
Cargo.toml
View File

@@ -101,8 +101,8 @@ default = [
] ]
jitdump = ["wasmtime/jitdump"] jitdump = ["wasmtime/jitdump"]
vtune = ["wasmtime/vtune"] vtune = ["wasmtime/vtune"]
wasi-crypto = ["wasmtime-wasi-crypto"] wasi-crypto = ["dep:wasmtime-wasi-crypto"]
wasi-nn = ["wasmtime-wasi-nn"] wasi-nn = ["dep:wasmtime-wasi-nn"]
memory-init-cow = ["wasmtime/memory-init-cow", "wasmtime-cli-flags/memory-init-cow"] memory-init-cow = ["wasmtime/memory-init-cow", "wasmtime-cli-flags/memory-init-cow"]
pooling-allocator = ["wasmtime/pooling-allocator", "wasmtime-cli-flags/pooling-allocator"] pooling-allocator = ["wasmtime/pooling-allocator", "wasmtime-cli-flags/pooling-allocator"]
all-arch = ["wasmtime/all-arch"] all-arch = ["wasmtime/all-arch"]

10
crates/wasmtime/Cargo.toml
View File

@@ -67,7 +67,7 @@ default = [
# with the Cranelift compiler. Cranelift is the default compilation backend of # with the Cranelift compiler. Cranelift is the default compilation backend of
# Wasmtime. If disabled then WebAssembly modules can only be created from # Wasmtime. If disabled then WebAssembly modules can only be created from
# precompiled WebAssembly modules. # precompiled WebAssembly modules.
cranelift = ["wasmtime-cranelift"] cranelift = ["dep:wasmtime-cranelift"]
# Enables support for the `perf` jitdump profiler # Enables support for the `perf` jitdump profiler
jitdump = ["wasmtime-jit/jitdump"] jitdump = ["wasmtime-jit/jitdump"]
@@ -76,14 +76,14 @@ jitdump = ["wasmtime-jit/jitdump"]
vtune = ["wasmtime-jit/vtune"] vtune = ["wasmtime-jit/vtune"]
# Enables parallel compilation of WebAssembly code. # Enables parallel compilation of WebAssembly code.
parallel-compilation = ["rayon"] parallel-compilation = ["dep:rayon"]
# Enables support for automatic cache configuration to be enabled in `Config`. # Enables support for automatic cache configuration to be enabled in `Config`.
cache = ["wasmtime-cache"] cache = ["dep:wasmtime-cache"]
# Enables support for "async stores" as well as defining host functions as # Enables support for "async stores" as well as defining host functions as
# `async fn` and calling functions asynchronously. # `async fn` and calling functions asynchronously.
async = ["wasmtime-fiber", "wasmtime-runtime/async", "async-trait"] async = ["dep:wasmtime-fiber", "wasmtime-runtime/async", "dep:async-trait"]
# Enables support for the pooling instance allocation strategy # Enables support for the pooling instance allocation strategy
pooling-allocator = ["wasmtime-runtime/pooling-allocator"] pooling-allocator = ["wasmtime-runtime/pooling-allocator"]
@@ -91,7 +91,7 @@ pooling-allocator = ["wasmtime-runtime/pooling-allocator"]
# Enables support for all architectures in Cranelift, allowing # Enables support for all architectures in Cranelift, allowing
# cross-compilation using the `wasmtime` crate's API, notably the # cross-compilation using the `wasmtime` crate's API, notably the
# `Engine::precompile_module` function. # `Engine::precompile_module` function.
all-arch = ["wasmtime-cranelift/all-arch"] all-arch = ["wasmtime-cranelift?/all-arch"]
# Enables trap handling using POSIX signals instead of Mach exceptions on MacOS. # Enables trap handling using POSIX signals instead of Mach exceptions on MacOS.
# It is useful for applications that do not bind their own exception ports and # It is useful for applications that do not bind their own exception ports and