pfreeze: Support building for macOS arm64 architecture

direct/src/dist/FreezeTool.py

@@ -222,7 +222,7 @@ class CompilationEnvironment:
                 self.linkDll = 'link /nologo /DLL /MAP:NUL /FIXED:NO /OPT:REF /INCREMENTAL:NO /LIBPATH:"%(PSDK)s\\lib" /LIBPATH:"%(MSVC)s\\lib%(suffix64)s" /LIBPATH:"%(python)s\\libs"  /out:%(basename)s%(dllext)s.pyd %(basename)s.obj'
 
         elif self.platform.startswith('osx_'):
-            # OSX
+            # macOS
             proc = self.platform.split('_', 1)[1]
             if proc == 'i386':
                 self.arch = '-arch i386'
@@ -230,6 +230,8 @@ class CompilationEnvironment:
                 self.arch = '-arch ppc'
             elif proc == 'amd64':
                 self.arch = '-arch x86_64'
+            elif proc in ('arm64', 'aarch64'):
+                self.arch = '-arch arm64'
             self.compileObjExe = "gcc -c %(arch)s -o %(basename)s.o -O2 -I%(pythonIPath)s %(filename)s"
             self.compileObjDll = "gcc -fPIC -c %(arch)s -o %(basename)s.o -O2 -I%(pythonIPath)s %(filename)s"
             self.linkExe = "gcc %(arch)s -o %(basename)s %(basename)s.o -framework Python"