ctypes.util.find_library fails with gcc 9

[pablogsal]

BPO	41976
Nosy	@pablogsal, @miss-islington
PRs	bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 #22598 [3.9] bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598) #22599 [3.8] bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598) #22600 [3.7] bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598) #22601

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

Show more details

GitHub fields:

assignee = 'https://github.com/pablogsal'
closed_at = <Date 2020-10-08.19:04:10.144>
created_at = <Date 2020-10-08.17:17:51.322>
labels = ['ctypes', '3.7', '3.8', '3.9', '3.10']
title = 'ctypes.util.find_library fails with gcc 9'
updated_at = <Date 2020-10-08.19:04:10.144>
user = 'https://github.com/pablogsal'

bugs.python.org fields:

activity = <Date 2020-10-08.19:04:10.144>
actor = 'pablogsal'
assignee = 'pablogsal'
closed = True
closed_date = <Date 2020-10-08.19:04:10.144>
closer = 'pablogsal'
components = ['ctypes']
creation = <Date 2020-10-08.17:17:51.322>
creator = 'pablogsal'
dependencies = []
files = []
hgrepos = []
issue_num = 41976
keywords = ['patch']
message_count = 5.0
messages = ['378258', '378264', '378270', '378271', '378274']
nosy_count = 2.0
nosy_names = ['pablogsal', 'miss-islington']
pr_nums = ['22598', '22599', '22600', '22601']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue41976'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10']

[pablogsal]

Running ctypes.util.find_library with gcc-9, if ldconfig is not available, it falls back to check the output of gcc -Wl,-t -lc to locate the library and then runs objdump on the file it's found to parse out the SONAME. With the gcc-9 the output of that gcc command is slightly perturbed so that /lib64/libc.so is listed before /libc64/libc.so.6. The former is a linker script not and ELF file so objdump fails.

[pablogsal]

New changeset 27ac19c by Pablo Galindo in branch 'master':
bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598)
27ac19c

[pablogsal]

New changeset 6ceb523 by Pablo Galindo in branch '3.8':
[3.8] bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598). (GH-22600)
6ceb523

[pablogsal]

New changeset 9b5a023 by Pablo Galindo in branch '3.7':
[3.7] bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598). (GH-22601)
9b5a023

[miss-islington]

New changeset a4ac5fa by Miss Skeleton (bot) in branch '3.9':
bpo-41976: Fix the fallback to gcc of ctypes.util.find_library when using gcc>9 (GH-22598)
a4ac5fa