setup doesn't report missing _ssl and _hashlib

[tiran]

BPO	36577
Nosy	@tiran, @miss-islington
PRs	bpo-36577: setup.py reports missing OpenSSL again #12746

^{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 2019-04-09.16:47:44.174>
created_at = <Date 2019-04-09.15:30:25.424>
labels = ['type-bug', '3.8', '3.9', 'build']
title = "setup doesn't report missing _ssl and _hashlib"
updated_at = <Date 2019-04-09.16:47:44.173>
user = 'https://github.com/tiran'

bugs.python.org fields:

activity = <Date 2019-04-09.16:47:44.173>
actor = 'christian.heimes'
assignee = 'none'
closed = True
closed_date = <Date 2019-04-09.16:47:44.174>
closer = 'christian.heimes'
components = ['Build']
creation = <Date 2019-04-09.15:30:25.424>
creator = 'christian.heimes'
dependencies = []
files = []
hgrepos = []
issue_num = 36577
keywords = ['patch']
message_count = 2.0
messages = ['339765', '339775']
nosy_count = 2.0
nosy_names = ['christian.heimes', 'miss-islington']
pr_nums = ['12746']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue36577'
versions = ['Python 3.8', 'Python 3.9']

[tiran]

setup does not report _ssl and _hashlib as failed to build in case OpenSSL libs or headers are missing. Related to bpo-36544 and bpo-36146

Reproducer:
$ ./configure --with-openssl=/invalid
$ make
...
running build
running build_ext

The following modules found by detect_modules() in setup.py, have been
built by the Makefile instead, as configured by the Setup files:
_abc atexit pwd
time

running build_scripts
...

With fix:
$ ./configure --with-openssl=/invalid
$ make
...
running build
running build_ext

Python build finished successfully!
The necessary bits to build these optional modules were not found:
_hashlib _ssl
To find the necessary bits, look in setup.py in detect_modules() for the module's name.

The following modules found by detect_modules() in setup.py, have been
built by the Makefile instead, as configured by the Setup files:
_abc atexit pwd
time

Could not build the ssl module!
Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().
LibreSSL 2.6.4 and earlier do not provide the necessary APIs, libressl/portable#381

running build_scripts
...

[miss-islington]

New changeset 8abc3f4 by Miss Islington (bot) (Christian Heimes) in branch 'master':
bpo-36577: setup.py reports missing OpenSSL again (GH-12746)
8abc3f4