[issue8654] Improve ABI compatibility between UCS2 and UCS4 builds

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

+#undef HAVE_USABLE_CHAR_T

Isn't it HAVE_USABLE_WCHAR_T?

+struct PY_UNICODE_STRUCT;
+typedef struct PY_UNICODE_STRUCT Py_UNICODE_STRUCT;
+#define Py_UNICODE Py_UNICODE_STRUCT

Why not simply `typedef struct PY_UNICODE_STRUCT Py_UNICODE`?

The _testunicodeagnostic module could have a simple test method making a couple of calls to PyUnicode_* functions.

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nosy: +pitrou

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<http://bugs.python.org/issue8654>
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