windows: remove copy instructions for libffi .dll and .pdb files

indygreg · indygreg · commit 30f14006e93f · 2021-09-21T20:06:42.000-07:00
These commands were changed in CPython 3.9.7 and are now more
strict about their behavior. To compensate for that, we need to patch
the batch script.

This should restore working CPython 3.9 Windows static builds.
diff --git a/cpython-windows/build.py b/cpython-windows/build.py
@@ -1550,6 +1550,22 @@ def build_libffi(
                 b"--build=$BUILD --host=$HOST --disable-shared;",
             )
 
+            # Remove references to copying .dll and .pdb files.
+            try:
+                static_replace_in_file(
+                    prepare_libffi,
+                    b"copy %ARTIFACTS%\.libs\libffi-*.dll %_LIBFFI_OUT% || exit /B 1",
+                    b"",
+                )
+                static_replace_in_file(
+                    prepare_libffi,
+                    b"copy %ARTIFACTS%\.libs\libffi-*.lib %_LIBFFI_OUT% || exit /B 1",
+                    b"",
+                )
+            except NoSearchStringError:
+                # This patch is only needed on CPython 3.9+.
+                pass
+
         env = dict(os.environ)
         env["LIBFFI_SOURCE"] = str(ffi_source_path)
         env["VCVARSALL"] = str(find_vcvarsall_path())
