hopefully clang comes with its own libc++

Author: kornelski

.github/workflows/ci.yml

@@ -333,7 +333,10 @@ jobs:
         directory: ${{ runner.temp }}/llvm
     - name: Add clang++-12 link
       working-directory: ${{ runner.temp }}/llvm/bin
-      run: ln -s clang++ clang++-12
+      run: |
+        ln -s clang++ clang++-12
+        # hack around libc++ ABI changes
+        echo "DYLD_LIBRARY_PATH=${{ runner.temp }}/llvm/lib:$DYLD_LIBRARY_PATH" >> $GITHUB_ENV
     - name: Set BORING_BSSL_FIPS_COMPILER_EXTERNAL_TOOLCHAIN
       run: echo "BORING_BSSL_FIPS_COMPILER_EXTERNAL_TOOLCHAIN=$(brew --prefix ${{ matrix.target }})/toolchain" >> $GITHUB_ENV
       shell: bash