remove support Py_HASH_EXTERNAL for Unix platforms for now

Author: picnixz

Doc/c-api/hash.rst

@@ -32,27 +32,6 @@ See also the :c:member:`PyTypeObject.tp_hash` member and :ref:`numeric-hash`.
    which algorithm is used for hashing. The hash algorithm can be configured
    via the configure :option:`--with-hash-algorithm` option.
 
-.. c:macro:: Py_HASH_EXTERNAL
-
-   If :c:macro:`Py_HASH_ALGORITHM` is set to that value, this means that
-   the hash function is externally implemented, that is, embedders must
-   provide a definition for ``extern PyHash_FuncDef PyHash_Func`` when
-   building Python:
-
-   .. code-block:: c
-
-      static Py_hash_t
-      my_siphash24(const void *src, Py_ssize_t src_sz) { ... }
-
-      PyHash_FuncDef PyHash_Func = {
-         .hash = my_siphash24,
-         .name = "my_siphash24",
-         .hash_bits = 64,
-         .seed_bits = 128,
-      };
-
-   .. availability:: Unix
-
 .. c:macro:: Py_HASH_CUTOFF
 
    Buffers of length in range ``[1, Py_HASH_CUTOFF)`` are hashed using DJBX33A

Doc/using/configure.rst

@@ -954,14 +954,13 @@ Libraries options
 Security Options
 ----------------
 
-.. option:: --with-hash-algorithm=[fnv|siphash13|siphash24|external]
+.. option:: --with-hash-algorithm=[fnv|siphash13|siphash24]
 
    Select hash algorithm for use in ``Python/pyhash.c``:
 
    * ``siphash13`` (default);
    * ``siphash24``;
-   * ``fnv``;
-   * ``external``.
+   * ``fnv``.
 
    .. versionadded:: 3.4
 

configure

@@ -3966,15 +3966,12 @@ dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
 AC_ARG_WITH(
   [hash_algorithm],
   [AS_HELP_STRING(
-    [--with-hash-algorithm=@<:@fnv|siphash13|siphash24|external@:>@],
+    [--with-hash-algorithm=@<:@fnv|siphash13|siphash24@:>@],
     [select hash algorithm for use in Python/pyhash.c (default is SipHash13)]
   )],
 [
 AC_MSG_RESULT([$withval])
 case "$withval" in
-    external)
-        AC_DEFINE([Py_HASH_ALGORITHM], [0])
-        ;;
     siphash13)
         AC_DEFINE([Py_HASH_ALGORITHM], [3])
         ;;