chore(CI): check build on 32-bit targets (#84)

This would have caught the build failure for 32-bit platforms reported
in issue #82. Adding a 32-bit build job to CI will help ensure we don't
break 32-bit builds in the future.

.github/workflows/ci.yml

@@ -3,34 +3,39 @@ name: CI
 on: [pull_request]
 
 jobs:
-  check:
-    name: check
+  build:
     runs-on: ubuntu-latest
     strategy:
       matrix:
         rust:
           - stable
           - nightly
           - 1.42.0
+        target:
+          - x86_64-unknown-linux-gnu
+        include:
+          - rust: stable
+            target: i686-unknown-linux-gnu
+    name: cargo +${{ matrix.rust }} build --target ${{ matrix.target }}
     steps:
       - uses: actions/checkout@master
       - name: Install toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
+          target: ${{ matrix.target }}
           override: true
-      - name: Cargo check
+      - name: cargo +${{ matrix.rust }} build --target ${{ matrix.target }}
         uses: actions-rs/cargo@v1
         with:
-          command: check
-          args: --all-features
+          command: build
+          args: --all-targets --target ${{ matrix.target }}
 
   test:
     name: Tests
     runs-on: ubuntu-latest
-    needs: check
-
+    needs: build
     steps:
       - uses: actions/checkout@master
 
@@ -46,7 +51,7 @@ jobs:
   test-loom:
     name: Loom tests
     runs-on: ubuntu-latest
-    needs: check
+    needs: build
 
     steps:
       - uses: actions/checkout@master
@@ -62,7 +67,7 @@ jobs:
 
   clippy_check:
     runs-on: ubuntu-latest
-    needs: check
+    needs: build
 
     steps:
       - uses: actions/checkout@v2
@@ -82,7 +87,7 @@ jobs:
   rustfmt:
     name: rustfmt
     runs-on: ubuntu-latest
-    needs: check
+    needs: build
 
     steps:
       - uses: actions/checkout@v2

Cargo.toml

@@ -35,14 +35,16 @@ harness = false
 lazy_static = "1"
 
 [dev-dependencies]
-loom = { version = "0.5", features = ["checkpoint"] }
 proptest = "1"
 criterion = "0.3"
 slab = "0.4.2"
 
 [target.'cfg(loom)'.dependencies]
 loom = { version = "0.5", features = ["checkpoint"], optional = true }
 
+[target.'cfg(loom)'.dev-dependencies]
+loom = { version = "0.5", features = ["checkpoint"] }
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]

rust-toolchain.toml

@@ -1,3 +1,7 @@
 [toolchain]
 channel = "stable"
 profile = "default"
+targets = [
+    "i686-unknown-linux-musl",
+    "x86_64-unknown-linux-gnu",
+]