New submission from STINNER Victor <vstin...@python.org>:
See "[Python-Dev] Should we require IEEE 754 floating-point for CPython?" thread: https://mail.python.org/archives/list/python-...@python.org/thread/J5FSP6J4EITPY5C2UJI7HSL2GQCTCUWN/ I propose to require IEEE 754 floating-point to build Python 3.11. I propose the following build: * Mention the new build requirement in What's New in Python 3.11. * Modify configure script to make it fail if the IEEE 754 support is missing. * Remove code handling missing NAN and infinity: float("nan"), float("inf"), math.nan and math.inf are always available. * Remove @requires_IEEE_754 decorator of test.support and tests. * Remove "unknown_format" code path of pack/unpack functions like _PyFloat_Pack8() (see bpo-46906 which proposes to make these functions public). The _PY_SHORT_FLOAT_REPR==0 code path is kept. For now, platforms with float larger than 64-bit but without HAVE_PY_SET_53BIT_PRECISION are still supported (but don't get "short float repr"). See GH-31592 for details. I prepared this requirement with these two changes: commit 1b2611eb0283055835e5df632a7a735db8c894b8 Author: Victor Stinner <vstin...@python.org> Date: Fri Feb 25 01:32:57 2022 +0100 bpo-46656: Remove Py_NO_NAN macro (GH-31160) Building Python now requires support for floating point Not-a-Number (NaN): remove the Py_NO_NAN macro. commit 5ab745fc51e159ead28b523414e52f0bcc1ef353 Author: Victor Stinner <vstin...@python.org> Date: Sat Feb 26 00:53:27 2022 +0100 bpo-46852: Remove the float.__set_format__() method (GH-31585) Remove the undocumented private float.__set_format__() method, previously known as float.__set_format__() in Python 3.7. Its docstring said: "You probably don't want to use this function. It exists mainly to be used in Python's test suite." By the way, building Python 3.11 now requires a C11 compiler. ---------- components: Build messages: 414485 nosy: vstinner priority: normal severity: normal status: open title: Require IEEE 754 floating point to build Python 3.11 versions: Python 3.11 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46917> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
