fix: prevent bn254 feature flag always being enabled (#225)

* fix: prevent bn254 feature flag always being enabled

* chore: misc `Cargo.toml` cleanup

Cargo.toml

@@ -3,14 +3,14 @@
 members = ["acir_field", "acir", "acvm", "stdlib"]
 
 [workspace.package]
-authors = ["The Noir Team <[email protected]>"]
+authors = ["The Noir Team <[email protected]>"]
 edition = "2021"
 license = "MIT"
 rust-version = "1.66"
 
 [workspace.dependencies]
 acir = { version = "0.9.0", path = "acir" }
-acir_field = { version = "0.9.0", path = "acir_field" }
+acir_field = { version = "0.9.0", path = "acir_field", default-features = false }
 stdlib = { package = "acvm_stdlib", version = "0.9.0", path = "stdlib" }
 
 hex = "0.4.2"
@@ -19,4 +19,4 @@ num-traits = "0.2"
 
 blake2 = "0.9.1"
 
-serde = { version = "1.0.136", features = ["derive"] }
+serde = { version = "1.0.136", features = ["derive"] }

acir_field/Cargo.toml

@@ -27,5 +27,5 @@ cfg-if = "1.0.0"
 
 [features]
 default = ["bn254"]
-bn254 = ["ark-bn254", "ark-ff"]
-bls12_381 = ["ark-bls12-381", "ark-ff"]
+bn254 = ["dep:ark-bn254", "dep:ark-ff"]
+bls12_381 = ["dep:ark-bls12-381", "dep:ark-ff"]

acvm/Cargo.toml

@@ -30,8 +30,8 @@ indexmap = "1.7.0"
 thiserror = "1.0.21"
 
 [features]
-bn254 = ["acir/bn254"]
-bls12_381 = ["acir/bls12_381"]
+bn254 = ["acir/bn254", "stdlib/bn254"]
+bls12_381 = ["acir/bls12_381", "stdlib/bls12_381"]
 
 [dev-dependencies]
 rand = "0.8.5"

stdlib/Cargo.toml

@@ -1,10 +1,17 @@
 [package]
 name = "acvm_stdlib"
-version = "0.9.0"
-edition = "2021"
-license = "MIT"
 description = "The ACVM standard library."
+version = "0.9.0"
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+rust-version.workspace = true
+
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-acir = { version = "0.9.0", path = "../acir", features = ["bn254"] }
+acir.workspace = true
+
+[features]
+bn254 = ["acir/bn254"]
+bls12_381 = ["acir/bls12_381"]