Enable more targets on CI

This brings the targets tested here in line with those tested in
`compiler-builtins`.

.github/workflows/main.yml

@@ -2,46 +2,114 @@ name: CI
 on: [push, pull_request]
 
 env:
+  CARGO_TERM_VERBOSE: true
   RUSTDOCFLAGS: -Dwarnings
   RUSTFLAGS: -Dwarnings
+  RUST_BACKTRACE: full
 
 jobs:
   docker:
     name: Docker
-    runs-on: ubuntu-latest
+    timeout-minutes: 10
     strategy:
+      fail-fast: false
       matrix:
-        target:
-        - aarch64-unknown-linux-gnu
-        - arm-unknown-linux-gnueabi
-        - arm-unknown-linux-gnueabihf
-        - armv7-unknown-linux-gnueabihf
-        # - i686-unknown-linux-gnu
-        # MIPS targets disabled since they are dropped to tier 3.
-        # See https://github.com/rust-lang/compiler-team/issues/648
-        #- mips-unknown-linux-gnu
-        #- mips64-unknown-linux-gnuabi64
-        #- mips64el-unknown-linux-gnuabi64
-        - powerpc-unknown-linux-gnu
-        - powerpc64-unknown-linux-gnu
-        - powerpc64le-unknown-linux-gnu
-        - x86_64-unknown-linux-gnu
+        include:
+        - target: aarch64-apple-darwin
+          os: macos-latest
+        - target: aarch64-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: aarch64-pc-windows-msvc
+          os: windows-latest
+          build_only: 1
+        - target: arm-unknown-linux-gnueabi
+          os: ubuntu-latest
+        - target: arm-unknown-linux-gnueabihf
+          os: ubuntu-latest
+        - target: armv7-unknown-linux-gnueabihf
+          os: ubuntu-latest
+        - target: i586-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: i686-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: powerpc-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: powerpc64-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: powerpc64le-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: riscv64gc-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: thumbv6m-none-eabi
+          os: ubuntu-latest
+        - target: thumbv7em-none-eabi
+          os: ubuntu-latest
+        - target: thumbv7em-none-eabihf
+          os: ubuntu-latest
+        - target: thumbv7m-none-eabi
+          os: ubuntu-latest
+        - target: x86_64-unknown-linux-gnu
+          os: ubuntu-latest
+        - target: x86_64-apple-darwin
+          os: macos-13
+        - target: i686-pc-windows-msvc
+          os: windows-latest
+        - target: x86_64-pc-windows-msvc
+          os: windows-latest
+        - target: i686-pc-windows-gnu
+          os: windows-latest
+          channel: nightly-i686-gnu
+        - target: x86_64-pc-windows-gnu
+          os: windows-latest
+          channel: nightly-x86_64-gnu
+    runs-on: ${{ matrix.os }}
+    env:
+      BUILD_ONLY: ${{ matrix.build_only }}
     steps:
-    - uses: actions/checkout@master
-    - name: Install Rust
-      run: rustup update nightly && rustup default nightly
-    - run: rustup target add ${{ matrix.target }}
-    - run: rustup target add x86_64-unknown-linux-musl
-    - run: cargo generate-lockfile
-    - run: ./ci/run-docker.sh ${{ matrix.target }}
+    - name: Print runner information
+      run: uname -a
+    - uses: actions/checkout@v4
+    - name: Install Rust (rustup)
+      shell: bash
+      run: |
+        channel="nightly"
+        # Account for channels that have required components (MinGW)
+        [ -n "${{ matrix.channel }}" ] && channel="${{ matrix.channel }}"
+        rustup update "$channel" --no-self-update
+        rustup default "$channel"
+        rustup target add ${{ matrix.target }}
+        rustup component add llvm-tools-preview
+    - uses: Swatinem/rust-cache@v2
+      with:
+        key: ${{ matrix.target }}
+
+    - name: Download musl source
+      run: ./ci/download-musl.sh
+      shell: bash
+
+    # Non-linux tests just use our raw script
+    - name: Run locally
+      if: matrix.os != 'ubuntu-latest'
+      shell: bash
+      run: ./ci/run.sh ${{ matrix.target }}
+
+    # Otherwise we use our docker containers to run builds
+    - name: Run in Docker
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        rustup target add x86_64-unknown-linux-musl
+        cargo generate-lockfile && ./ci/run-docker.sh ${{ matrix.target }}
 
   rustfmt:
     name: Rustfmt
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
     - name: Install Rust
-      run: rustup update stable && rustup default stable && rustup component add rustfmt
+      run: |
+        rustup update stable --no-self-update
+        rustup default stable
+        rustup component add rustfmt
     - run: cargo fmt -- --check
 
   wasm:
@@ -50,17 +118,19 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - name: Install Rust
-      run: rustup update nightly && rustup default nightly
+      run: rustup update nightly --no-self-update && rustup default nightly
     - run: rustup target add wasm32-unknown-unknown
+    - name: Download MUSL source
+      run: ./ci/download-musl.sh
     - run: cargo build --target wasm32-unknown-unknown
 
-  cb:
+  builtins:
     name: "The compiler-builtins crate works"
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
     - name: Install Rust
-      run: rustup update nightly && rustup default nightly
+      run: rustup update nightly --no-self-update && rustup default nightly
     - run: cargo build -p cb
 
   benchmarks:
@@ -69,15 +139,17 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - name: Install Rust
-      run: rustup update nightly && rustup default nightly
+      run: rustup update nightly --no-self-update && rustup default nightly
+    - name: Download MUSL source
+      run: ./ci/download-musl.sh
     - run: cargo bench --all
 
   success:
     needs:
       - docker
       - rustfmt
       - wasm
-      - cb
+      - builtins
       - benchmarks
     runs-on: ubuntu-latest
     # GitHub branch protection is exceedingly silly and treats "jobs skipped because a dependency

ci/run.sh

@@ -2,21 +2,53 @@
 
 set -eux
 
-target="$1"
+export RUST_BACKTRACE="${RUST_BACKTRACE:-full}"
+# Needed for no-panic to correct detect a lack of panics
+export RUSTFLAGS="${RUSTFLAGS:-} -Ccodegen-units=1"
 
-cmd="cargo test --all --target $target"
+target="${1:-}"
 
-# Needed for no-panic to correct detect a lack of panics
-export RUSTFLAGS="$RUSTFLAGS -Ccodegen-units=1"
+if [ -z "$target" ]; then
+    host_target=$(rustc -vV | awk '/^host/ { print $2 }')
+    echo "Defaulted to host target $host_target"
+    target="$host_target"
+fi
+
+extra_flags=""
+
+# We need to specifically skip tests for musl-math-sys on systems that can't
+# build musl since otherwise `--all` will activate it.
+case "$target" in
+    *windows-msvc*) extra_flags="$extra_flags --exclude musl-math-sys" ;;
+    *wasm*) extra_flags="$extra_flags --exclude musl-math-sys" ;;
+    *thumb*) extra_flags="$extra_flags --exclude musl-math-sys" ;;
+esac
+
+# FIXME: `STATUS_DLL_NOT_FOUND` testing macros on CI.
+# <https://github.com/rust-lang/rust/issues/128944>
+case "$target" in
+    *windows-gnu) extra_flags="$extra_flags --exclude libm-macros" ;;
+esac
+
+if [ "$(uname -a)" = "Linux" ]; then
+    # also run the reference tests when we can. requires a Linux host.
+    extra_flags="$extra_flags --features libm-test/musl-bitwise-tests"
+fi
+
+if [ "${BUILD_ONLY:-}" = "1" ]; then
+    cmd="cargo build --target $target --package libm"
+    $cmd
+    $cmd --features 'unstable'
 
-# stable by default
-$cmd
-$cmd --release
+    echo "no tests to run for no_std"
+else
+    cmd="cargo test --all --target $target $extra_flags"
 
-# unstable with a feature
-$cmd --features 'unstable'
-$cmd --release --features 'unstable'
+    # stable by default
+    $cmd
+    $cmd --release
 
-# also run the reference tests
-$cmd --features 'unstable libm-test/musl-bitwise-tests'
-$cmd --release --features 'unstable libm-test/musl-bitwise-tests'
+    # unstable with a feature
+    $cmd --features 'unstable'
+    $cmd --release --features 'unstable'
+fi