Expose disable_target_static_assertions feature flag (#257)

* [api-client] explicitly disable target static assertions in ap-client

* make disable_target_static_assertions and optional feature

* [test-no-std] say how it needs to be used.

Cargo.toml

@@ -39,6 +39,8 @@ sp-std = { version = "4.0.0-dev", default-features = false, git = "https://githu
 # need to add this for the app_crypto macro
 sp-application-crypto = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "master", features = ["full_crypto"] }
 
+sp-runtime-interface = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "master" }
+
 # local deps
 ac-compose-macros = { path = "compose-macros", default-features = false }
 ac-node-api = { path = "node-api", optional = true }
@@ -54,6 +56,10 @@ wabt = "0.10.0"
 
 [features]
 default = ["std", "ws-client"]
+# To support `no_std` builds in non-32 bit environments.
+disable_target_static_assertions = [
+ "sp-runtime-interface/disable_target_static_assertions"
+]
 std = [
 	"sp-application-crypto/std",
 	"sp-core/std",
@@ -72,6 +78,7 @@ std = [
 	"primitive-types",
 	"thiserror",
 	"sp-rpc",
+	"sp-runtime-interface/std",
 	"transaction-payment/std",
 	# local deps
 	"ac-compose-macros/std",

node-api/Cargo.toml

@@ -27,10 +27,14 @@ sp-runtime = { version = "6.0.0", default-features = false, git = "https://githu
 
 # need to add this for `no_std`
 sp-application-crypto = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "master", features = ["full_crypto"] }
-sp-runtime-interface = { version = "6.0.0", default-features = false, features = ["disable_target_static_assertions"], git = "https://github.com/paritytech/substrate.git", branch = "master" }
+sp-runtime-interface = { version = "6.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "master" }
 
 [features]
 default = ["std"]
+# To support `no_std` builds in non-32 bit environments.
+disable_target_static_assertions = [
+    "sp-runtime-interface/disable_target_static_assertions"
+]
 std = [
     "codec/std",
     "frame-metadata/std",

test-no-std/Cargo.toml

@@ -8,8 +8,8 @@ edition = "2021"
 libc = { version = "0.2.119", default-features = false }
 
 # local dependencies
-ac-node-api = { path = "../node-api", default-features = false, optional = true }
-substrate-api-client = { path = "..", default-features = false, optional = true }
+ac-node-api = { path = "../node-api", default-features = false, optional = true, features = ["disable_target_static_assertions"] }
+substrate-api-client = { path = "..", default-features = false, optional = true, features = ["disable_target_static_assertions"] }
 
 # substrate dependencies
 sp-io = { version = "6.0.0", default-features = false, features = ["disable_oom", "disable_panic_handler"], git = "https://github.com/paritytech/substrate.git", branch = "master" }

test-no-std/src/main.rs

@@ -3,6 +3,9 @@
 #![no_std]
 #![no_main]
 
+#[cfg(not(any(feature = "api-client", feature = "node-api")))]
+compile_error!("either feature \"api-client\" or feature \"node-api\" must be enabled");
+
 // DUTs
 
 #[cfg(feature = "api-client")]