setup.py: arm64 macOS fixes

- Passing --target to CFLAGS and LDFLAGS based on ARCHFLAGS

Author: jerstlouis

.github/workflows/wheels.yml

@@ -43,7 +43,7 @@ jobs:
         run: git submodule update --init --recursive
 
       - name: Install cibuildwheel
-        run: python3 -m pip install cibuildwheel==2.23.3
+        run: python3 -m pip install cibuildwheel #==2.23.3
 
       - name: Build wheels
         run: python3 -m cibuildwheel --output-dir wheelhouse

setup.py

@@ -134,7 +134,22 @@ def build_package():
          #subprocess.check_call(['gcc', '-v', '-m32'], cwd=eC_dir, env=env)
          #subprocess.check_call(['gcc', '-print-sysroot', '-m32'], cwd=eC_dir, env=env)
          #subprocess.check_call([make_cmd, f'troubleshoot'], cwd=eC_dir, env=env)
+
+         archflags = env.get("ARCHFLAGS", "")
+         # Convert the space-separated -arch into a single-word target flag (work-around for eC compiler not yet recognizing two arguments '-arch arm64')
+         if "arm64" in archflags:
+            archflags = "--target=arm64-apple-macos"
+         elif "x86_64" in archflags:
+            archflags = "--target=x86_64-apple-macos"
+         else:
+            archflags = None
+
          make_and_args = [make_cmd, f'-j{cpu_count}', 'SKIP_SONAME=y'] #, 'V=1']
+         if archflags is not None:
+            # This will add arm64 architecture flags for macos-latest
+            make_and_args.append('CFLAGS=' + archflags)
+            make_and_args.append('LDFLAGS=' + archflags)
+
          if cc_override is not None:
             make_and_args.extend(cc_override)