Duplicated symbols when linking embedded Python with libexpat

[yilei]

BPO	46784
Nosy	@gpshead, @ned-deily, @ambv, @corona10, @yilei, @miss-islington
PRs	bpo-46784: Add newly exported expat symbols to the namespace. #31397 [3.10] bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397) #31416 [3.9] bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397) #31417 [3.7] bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397) #31418 [3.8] bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397) #31419 [3.10] bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397) #31420

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2022-02-19.01:26:06.434>
created_at = <Date 2022-02-17.23:35:45.944>
labels = ['3.7', '3.8', '3.9', '3.10', '3.11', 'expert-XML', 'build']
title = 'Duplicated symbols when linking embedded Python with libexpat'
updated_at = <Date 2022-03-08.09:35:51.740>
user = 'https://github.com/yilei'

bugs.python.org fields:

activity = <Date 2022-03-08.09:35:51.740>
actor = 'lukasz.langa'
assignee = 'none'
closed = True
closed_date = <Date 2022-02-19.01:26:06.434>
closer = 'gregory.p.smith'
components = ['Build', 'XML']
creation = <Date 2022-02-17.23:35:45.944>
creator = 'yilei'
dependencies = []
files = []
hgrepos = []
issue_num = 46784
keywords = ['patch']
message_count = 8.0
messages = ['413464', '413515', '413516', '413520', '413521', '413522', '413670', '414738']
nosy_count = 6.0
nosy_names = ['gregory.p.smith', 'ned.deily', 'lukasz.langa', 'corona10', 'yilei', 'miss-islington']
pr_nums = ['31397', '31416', '31417', '31418', '31419', '31420']
priority = 'normal'
resolution = 'fixed'
stage = 'commit review'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue46784'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10', 'Python 3.11']

[yilei]

The libexpat 2.4.1 upgrade from https://bugs.python.org/issue44394 introduced the following new exported symbols:

testingAccountingGetCountBytesDirect
testingAccountingGetCountBytesIndirect
unsignedCharToPrintable
XML_SetBillionLaughsAttackProtectionActivationThreshold
XML_SetBillionLaughsAttackProtectionMaximumAmplification

We need to adjust Modules/expat/pyexpatns.h

(The newer libexpat upgrade https://bugs.python.org/issue46400 has no new symbols).

I'll send a PR.

[miss-islington]

New changeset 6312c10 by Yilei "Dolee" Yang in branch 'main':
bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397)
6312c10

[miss-islington]

New changeset 9aca412 by Miss Islington (bot) in branch '3.9':
bpo-46784: Add newly exported expat symbols to the namespace. (GH-31397)
9aca412