Fix cross-compilation archiving step

Author: madsmtm

.github/workflows/main.yml

@@ -182,9 +182,10 @@ 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-18-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