Fix cross-compilation archiving step

Author: madsmtm

.github/workflows/main.yml

@@ -167,6 +167,9 @@ jobs:
         env:
           CC: ${{ matrix.CC }}
           CXX: ${{ matrix.CXX }}
+      - name: Install llvm tools (for llvm-ar)
+        if: startsWith(matrix.build, 'cross-macos') || startsWith(matrix.build, 'cross-ios')
+        run: sudo apt-get install llvm
       - name: Download macOS SDK
         if: startsWith(matrix.build, 'cross-macos')
         run: |
@@ -182,9 +185,10 @@ jobs:
       - name: Set up Apple cross-compilation
         if: startsWith(matrix.build, 'cross-macos') || startsWith(matrix.build, 'cross-ios')
         run: |
-          # Test with clang for now, has better cross-compilation support (GCC requires downloading a different toolchain)
+          # Test with clang/llvm for now, has better cross-compilation support (GCC requires downloading a different toolchain)
           echo "CC=clang" >> $GITHUB_ENV
           echo "CXX=clang++" >> $GITHUB_ENV
+          echo "AR=llvm-ar" >> $GITHUB_ENV
           # Link with rust-lld
           UPPERCASE_TARGET_NAME=$(echo "${{ matrix.target }}" | tr '[:lower:]-' '[:upper:]_')
           echo "CARGO_TARGET_${UPPERCASE_TARGET_NAME}_LINKER=rust-lld" >> $GITHUB_ENV