Add no_std target to CI

Signed-off-by: aeryz <[email protected]>

.circleci/config.yml

@@ -260,9 +260,12 @@ jobs:
           name: Add wasm32 target
           command: rustup target add wasm32-unknown-unknown && rustup target list --installed
       - run:
-          name: Build library for native target (no_std)
+          name: Add no_std target
+          command: rustup target add thumbv7em-none-eabi && rustup target list --installed
+      - run:
+          name: Build library for no_std target
           working_directory: ~/project/packages/std
-          command: cargo build --locked --no-default-features
+          command: cargo build --locked --no-default-features --target thumbv7em-none-eabi
       - run:
           name: Build library for native target (only "std" feature)
           working_directory: ~/project/packages/std
@@ -276,9 +279,9 @@ jobs:
           working_directory: ~/project/packages/std
           command: cargo test --locked --no-default-features --features std
       - run:
-          name: Build library for native target (all features "no_std")
+          name: Build library for no_std target (all features "no_std")
           working_directory: ~/project/packages/std
-          command: cargo build --locked --no-default-features --features abort,iterator,staking,stargate,std,cosmwasm_1_1
+          command: cargo build --locked --no-default-features --features abort,iterator,staking,stargate,cosmwasm_1_1 --target thumbv7em-none-eabi
       - run:
           name: Build library for native target (all features)
           working_directory: ~/project/packages/std

packages/std/src/ibc.rs

@@ -9,6 +9,7 @@ use serde::{Deserialize, Serialize};
 use crate::addresses::Addr;
 use crate::binary::Binary;
 use crate::coin::Coin;
+#[cfg(feature = "std")]
 use crate::errors::StdResult;
 use crate::results::{Attribute, CosmosMsg, Empty, Event, SubMsg};
 #[cfg(feature = "std")]