add macOS hwloc dependencies

.github/workflows/push.yml

@@ -2,8 +2,8 @@ name: Rust checks and tests
 on:
   pull_request:
     paths-ignore:
-      - '**.md'
-      - '.gitignore'
+      - "**.md"
+      - ".gitignore"
 
   workflow_dispatch:
     inputs:
@@ -68,6 +68,11 @@ jobs:
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
 
+      # Needed for hwloc
+      - name: Install automake (macOS)
+        run: brew install automake
+        if: runner.os == 'macOS'
+
       # Workaround to resolve link error with C:\msys64\mingw64\bin\libclang.dll
       - name: Remove msys64
         run: Remove-Item -LiteralPath "C:\msys64\" -Force -Recurse
@@ -93,18 +98,17 @@ jobs:
       - name: Clean unused artifacts
         run: cargo sweep --maxsize ${{ env.MAX_TARGET_SIZE }}
 
-
   test:
     strategy:
       matrix:
         os: ${{ fromJson(github.repository_owner == 'subspace' && '[["self-hosted", "ubuntu-20.04-x86-64"], ["self-hosted", "macos-12-arm64"], ["self-hosted", "windows-server-2022-x86-64"]]' || '["ubuntu-20.04", "macos-12", "windows-2022"]') }}
         run-all:
           - ${{ inputs.test-macos-and-windows || github.ref == 'refs/heads/master' }}
-        exclude:  # exclude macos-12 and window-2022 when the condition is false
-        - run-all: false
-          os: macos-12
-        - run-all: false
-          os: windows-2022
+        exclude: # exclude macos-12 and window-2022 when the condition is false
+          - run-all: false
+            os: macos-12
+          - run-all: false
+            os: windows-2022
 
     runs-on: ${{ matrix.os }}
 
@@ -124,6 +128,11 @@ jobs:
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
 
+      # Needed for hwloc
+      - name: Install automake (macOS)
+        run: brew install automake
+        if: runner.os == 'macOS'
+
       # Workaround to resolve link error with C:\msys64\mingw64\bin\libclang.dll
       - name: Remove msys64
         run: Remove-Item -LiteralPath "C:\msys64\" -Force -Recurse