From 5b80bfd7bffd4c20d80b7c70a7130529e9a755dd Mon Sep 17 00:00:00 2001 From: ToshikazuOhiwa Date: Mon, 30 Mar 2020 09:24:26 +0900 Subject: agl-basesystem --- ...ss-missing-libraries-to-Extension-for-mul.patch | 82 ++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 external/poky/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch (limited to 'external/poky/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch') diff --git a/external/poky/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch b/external/poky/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch new file mode 100644 index 00000000..5c3af6b6 --- /dev/null +++ b/external/poky/meta/recipes-devtools/python/python3/pass-missing-libraries-to-Extension-for-mul.patch @@ -0,0 +1,82 @@ +From a784b70d47ba2104afbcfd805e2a66cdc2109ec5 Mon Sep 17 00:00:00 2001 +From: Hongxu Jia +Date: Fri, 4 Aug 2017 11:16:14 +0800 +Subject: [PATCH] setup.py: pass missing libraries to Extension for multiprocessing module + +In the following commit: +... +commit e711cafab13efc9c1fe6c5cd75826401445eb585 +Author: Benjamin Peterson +Date: Wed Jun 11 16:44:04 2008 +0000 + + Merged revisions 64104,64117 via svnmerge from + svn+ssh://pythondev@svn.python.org/python/trunk +... +(see diff in setup.py) +It assigned libraries for multiprocessing module according +the host_platform, but not pass it to Extension. + +In glibc, the following commit caused two definition of +sem_getvalue are different. +https://sourceware.org/git/?p=glibc.git;a=commit;h=042e1521c794a945edc43b5bfa7e69ad70420524 +(see diff in nptl/sem_getvalue.c for detail) +`__new_sem_getvalue' is the latest sem_getvalue@@GLIBC_2.1 +and `__old_sem_getvalue' is to compat the old version +sem_getvalue@GLIBC_2.0. + +To build python for embedded Linux systems: +http://www.yoctoproject.org/docs/2.3.1/yocto-project-qs/yocto-project-qs.html +If not explicitly link to library pthread (-lpthread), it will +load glibc's sem_getvalue randomly at runtime. + +Such as build python on linux x86_64 host and run the python +on linux x86_32 target. If not link library pthread, it caused +multiprocessing bounded semaphore could not work correctly. +... +>>> import multiprocessing +>>> pool_sema = multiprocessing.BoundedSemaphore(value=1) +>>> pool_sema.acquire() +True +>>> pool_sema.release() +Traceback (most recent call last): + File "", line 1, in +ValueError: semaphore or lock released too many times +... + +And the semaphore issue also caused multiprocessing.Queue().put() hung. + +Upstream-Status: Submitted [https://github.com/python/cpython/pull/2999] + +Signed-off-by: Hongxu Jia +--- + setup.py | 7 +++++-- + 1 file changed, 5 insertions(+), 2 deletions(-) + +diff --git a/setup.py b/setup.py +index 4f0f522..d05707d 100644 +--- a/setup.py ++++ b/setup.py +@@ -1606,8 +1606,10 @@ class PyBuildExt(build_ext): + elif host_platform.startswith('netbsd'): + macros = dict() + libraries = [] +- +- else: # Linux and other unices ++ elif host_platform.startswith(('linux')): ++ macros = dict() ++ libraries = ['pthread'] ++ else: # Other unices + macros = dict() + libraries = ['rt'] + +@@ -1626,6 +1628,7 @@ class PyBuildExt(build_ext): + if sysconfig.get_config_var('WITH_THREAD'): + exts.append ( Extension('_multiprocessing', multiprocessing_srcs, + define_macros=list(macros.items()), ++ libraries=libraries, + include_dirs=["Modules/_multiprocessing"])) + else: + missing.append('_multiprocessing') +-- +2.7.4 + -- cgit 1.2.3-korg