Diagnose Homebrew GCC

.github/workflows/cd.yml

@@ -130,8 +130,9 @@ jobs:
           config-file: pyproject.toml
         env:
           # Default to GCC compiler and OpenMP on macOS.
+          # HACK: Hardcode g++-13 compiler for GitHub macOS runners.
           CIBW_ENVIRONMENT_MACOS: >-
-            PY_CXX=$(find $(brew --prefix gcc)/bin -type f -name 'g++*')
+            PY_CXX=$(brew --prefix)/bin/g++-13
             PY_CXXFLAGS=-I$(brew --prefix)/include
             PY_LDFLAGS=-L$(brew --prefix)/lib
           # # Switch to LLVM compiler and OpenMP on macOS.
@@ -142,6 +143,9 @@ jobs:
           #   PY_OMP=1
           #   PY_CXXFLAGS_OMP="-I$(brew --prefix libomp)/include -fopenmp"
           #   PY_LDFLAGS_OMP="-L$(brew --prefix libomp)/lib -lomp"
+          CIBW_REPAIR_WHEEL_COMMAND_MACOS: >
+            delocate-listdeps {wheel} &&
+            delocate-wheel --require-archs {delocate_archs} -w {dest_dir} -v {wheel}
 
       - name: Verify built distribution
         run: python -m twine check --strict dist/*