[dependencies]
arrayvec = { version = "0.7", default-features = false }
ena = "0.14"
-indexmap = { version = "1.8.0", features = ["rustc-rayon"] }
+indexmap = { version = "1.8.0" }
tracing = "0.1"
jobserver_crate = { version = "0.1.13", package = "jobserver" }
rustc_serialize = { path = "../rustc_serialize" }
rustc_graphviz = { path = "../rustc_graphviz" }
cfg-if = "0.1.2"
stable_deref_trait = "1.0.0"
-rayon = { version = "0.3.2", package = "rustc-rayon" }
-rayon-core = { version = "0.3.2", package = "rustc-rayon-core" }
+rayon = { version = "0.3.2", package = "rustc-rayon", optional = true }
+rayon-core = { version = "0.3.2", package = "rustc-rayon-core", optional = true }
rustc-hash = "1.1.0"
smallvec = { version = "1.6.1", features = ["const_generics", "union", "may_dangle"] }
rustc_index = { path = "../rustc_index", package = "rustc_index" }
[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
memmap2 = "0.2.1"
+
+[features]
+rustc_use_parallel_compiler = ["indexmap/rustc-rayon", "rayon", "rayon-core"]