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-rw-r--r--meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch82
1 files changed, 82 insertions, 0 deletions
diff --git a/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch b/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch
new file mode 100644
index 0000000000..5c3af6b626
--- /dev/null
+++ b/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch
@@ -0,0 +1,82 @@
1From a784b70d47ba2104afbcfd805e2a66cdc2109ec5 Mon Sep 17 00:00:00 2001
2From: Hongxu Jia <hongxu.jia@windriver.com>
3Date: Fri, 4 Aug 2017 11:16:14 +0800
4Subject: [PATCH] setup.py: pass missing libraries to Extension for multiprocessing module
5
6In the following commit:
7...
8commit e711cafab13efc9c1fe6c5cd75826401445eb585
9Author: Benjamin Peterson <benjamin@python.org>
10Date: Wed Jun 11 16:44:04 2008 +0000
11
12 Merged revisions 64104,64117 via svnmerge from
13 svn+ssh://pythondev@svn.python.org/python/trunk
14...
15(see diff in setup.py)
16It assigned libraries for multiprocessing module according
17the host_platform, but not pass it to Extension.
18
19In glibc, the following commit caused two definition of
20sem_getvalue are different.
21https://sourceware.org/git/?p=glibc.git;a=commit;h=042e1521c794a945edc43b5bfa7e69ad70420524
22(see diff in nptl/sem_getvalue.c for detail)
23`__new_sem_getvalue' is the latest sem_getvalue@@GLIBC_2.1
24and `__old_sem_getvalue' is to compat the old version
25sem_getvalue@GLIBC_2.0.
26
27To build python for embedded Linux systems:
28http://www.yoctoproject.org/docs/2.3.1/yocto-project-qs/yocto-project-qs.html
29If not explicitly link to library pthread (-lpthread), it will
30load glibc's sem_getvalue randomly at runtime.
31
32Such as build python on linux x86_64 host and run the python
33on linux x86_32 target. If not link library pthread, it caused
34multiprocessing bounded semaphore could not work correctly.
35...
36>>> import multiprocessing
37>>> pool_sema = multiprocessing.BoundedSemaphore(value=1)
38>>> pool_sema.acquire()
39True
40>>> pool_sema.release()
41Traceback (most recent call last):
42 File "<stdin>", line 1, in <module>
43ValueError: semaphore or lock released too many times
44...
45
46And the semaphore issue also caused multiprocessing.Queue().put() hung.
47
48Upstream-Status: Submitted [https://github.com/python/cpython/pull/2999]
49
50Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
51---
52 setup.py | 7 +++++--
53 1 file changed, 5 insertions(+), 2 deletions(-)
54
55diff --git a/setup.py b/setup.py
56index 4f0f522..d05707d 100644
57--- a/setup.py
58+++ b/setup.py
59@@ -1606,8 +1606,10 @@ class PyBuildExt(build_ext):
60 elif host_platform.startswith('netbsd'):
61 macros = dict()
62 libraries = []
63-
64- else: # Linux and other unices
65+ elif host_platform.startswith(('linux')):
66+ macros = dict()
67+ libraries = ['pthread']
68+ else: # Other unices
69 macros = dict()
70 libraries = ['rt']
71
72@@ -1626,6 +1628,7 @@ class PyBuildExt(build_ext):
73 if sysconfig.get_config_var('WITH_THREAD'):
74 exts.append ( Extension('_multiprocessing', multiprocessing_srcs,
75 define_macros=list(macros.items()),
76+ libraries=libraries,
77 include_dirs=["Modules/_multiprocessing"]))
78 else:
79 missing.append('_multiprocessing')
80--
812.7.4
82