Merge pull request #352 from pitdicker/restrict_stdweb_feature

Restrict the stdweb feature to the wasm32-unknown-unknown target

Author: dhardy

Cargo.toml

@@ -33,7 +33,6 @@ rand_core = { version = '0.1.0-pre.0', default-features = false }
 log = { version = "0.4", optional = true }
 serde = { version = "1", optional = true }
 serde_derive = { version = "1", optional = true }
-stdweb = { version = "0.4", optional = true }
 
 [target.'cfg(unix)'.dependencies]
 libc = { version = "0.2", optional = true }
@@ -47,6 +46,10 @@ cloudabi = { version = "0.0.3", optional = true }
 [target.'cfg(target_os = "fuchsia")'.dependencies]
 fuchsia-zircon = { version = "0.3.2", optional = true }
 
+[target.wasm32-unknown-unknown.dependencies]
+# use with `--target wasm32-unknown-unknown --features=stdweb`
+stdweb = { version = "0.4", optional = true }
+
 [dev-dependencies]
 # This is for testing serde, unfortunately we can't specify feature-gated dev
 # deps yet, see: https://github.com/rust-lang/cargo/issues/1596

src/lib.rs

@@ -188,7 +188,7 @@
 #[cfg(feature="serde-1")] extern crate serde;
 #[cfg(feature="serde-1")] #[macro_use] extern crate serde_derive;
 
-#[cfg(feature = "stdweb")]
+#[cfg(all(target_arch = "wasm32", feature = "stdweb"))]
 #[macro_use]
 extern crate stdweb;