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python,python3: Fix ctypes.util.find_library()

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Python's ctypes.util.find_library() function currently doesn't work for
musl libraries/systems[1].

This adds a patch to fix this function, based on a patch from Alpine
Linux[2].

Fixes #9448.

[1]: https://bugs.python.org/issue21622
[2]: https://git.alpinelinux.org/aports/tree/main/python2/musl-find_library.patch

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
This commit is contained in:
Jeffery To 2019-07-22 04:42:54 +08:00
parent d3dbea185c
commit 2d6700ed38
4 changed files with 150 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
lang/python/python/Makefile
View file

@ -12,7 +12,7 @@ include ../python-version.mk
PKG_NAME:=python
PKG_VERSION:=$(PYTHON_VERSION).$(PYTHON_VERSION_MICRO)
PKG_RELEASE:=7
PKG_RELEASE:=8
PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=https://www.python.org/ftp/python/$(PKG_VERSION)

74
lang/python/python/patches/024-musl-find_library.patch Normal file
View file

@ -0,0 +1,74 @@
https://bugs.python.org/issue21622
Based on the patch from Alpine Linux
https://git.alpinelinux.org/aports/tree/main/python2/musl-find_library.patch
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -86,6 +86,8 @@ if os.name == "posix" and sys.platform =
elif os.name == "posix":
# Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump
import re, tempfile, errno
+ from glob import glob
+ musl_ldso = glob('/lib/ld-musl-*.so.1')
def _findLib_gcc(name):
# Run GCC's linker with the -t (aka --trace) option and examine the
@@ -232,6 +234,57 @@ elif os.name == "posix":
def find_library(name, is64 = False):
return _get_soname(_findLib_crle(name, is64) or _findLib_gcc(name))
+ elif musl_ldso and os.path.isfile(musl_ldso[0]):
+
+ def _is_elf(filepath):
+ try:
+ with open(filepath, 'rb') as fh:
+ return fh.read(4) == b'\x7fELF'
+ except:
+ return False
+
+ def find_library(name):
+ # absolute name?
+ if os.path.isabs(name):
+ if _is_elf(name):
+ return name
+ else:
+ return None
+
+ # special case for unified standard libs
+ stdlibs = ['libcrypt.so', 'libdl.so', 'libm.so', 'libpthread.so', 'libresolv.so', 'librt.so', 'libutil.so', 'libxnet.so']
+ if name in stdlibs:
+ name = 'libc.so'
+ elif ('lib' + name + '.so') in stdlibs:
+ name = 'c'
+
+ paths = []
+ # read path list from /etc/ld-musl-$(ARCH).path
+ path_list = musl_ldso[0].replace('/lib/', '/etc/').replace('.so.1', '.path')
+ try:
+ with open(path_list, 'r') as fh:
+ paths = [path for line in fh for path in line.rstrip('\n').split(':') if path]
+ except:
+ paths = []
+ # default path list if /etc/ld-musl-$(ARCH).path is empty or does not exist
+ if not paths:
+ paths = ['/lib', '/usr/local/lib', '/usr/lib']
+
+ # prepend paths from LD_LIBRARY_PATH
+ if 'LD_LIBRARY_PATH' in os.environ:
+ paths = os.environ['LD_LIBRARY_PATH'].split(':') + paths
+
+ for d in paths:
+ f = os.path.join(d, name)
+ if _is_elf(f):
+ return os.path.basename(f)
+
+ prefix = os.path.join(d, 'lib'+name)
+ for suffix in ['.so', '.so.*']:
+ for f in glob('{0}{1}'.format(prefix, suffix)):
+ if _is_elf(f):
+ return os.path.basename(f)
+
else:
def _findSoname_ldconfig(name):

2
lang/python/python3/Makefile
View file

@ -14,7 +14,7 @@ PYTHON_VERSION:=$(PYTHON3_VERSION)
PYTHON_VERSION_MICRO:=$(PYTHON3_VERSION_MICRO)
PKG_NAME:=python3
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_VERSION:=$(PYTHON_VERSION).$(PYTHON_VERSION_MICRO)
PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz

74
lang/python/python3/patches/024-musl-find_library.patch Normal file
View file

@ -0,0 +1,74 @@
https://bugs.python.org/issue21622
Based on the patch from Alpine Linux
https://git.alpinelinux.org/aports/tree/main/python2/musl-find_library.patch
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -92,6 +92,8 @@ elif sys.platform.startswith("aix"):
elif os.name == "posix":
# Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump
import re, tempfile
+ from glob import glob
+ musl_ldso = glob('/lib/ld-musl-*.so.1')
def _findLib_gcc(name):
# Run GCC's linker with the -t (aka --trace) option and examine the
@@ -252,6 +254,57 @@ elif os.name == "posix":
def find_library(name, is64 = False):
return _get_soname(_findLib_crle(name, is64) or _findLib_gcc(name))
+ elif musl_ldso and os.path.isfile(musl_ldso[0]):
+
+ def _is_elf(filepath):
+ try:
+ with open(filepath, 'rb') as fh:
+ return fh.read(4) == b'\x7fELF'
+ except:
+ return False
+
+ def find_library(name):
+ # absolute name?
+ if os.path.isabs(name):
+ if _is_elf(name):
+ return name
+ else:
+ return None
+
+ # special case for unified standard libs
+ stdlibs = ['libcrypt.so', 'libdl.so', 'libm.so', 'libpthread.so', 'libresolv.so', 'librt.so', 'libutil.so', 'libxnet.so']
+ if name in stdlibs:
+ name = 'libc.so'
+ elif ('lib' + name + '.so') in stdlibs:
+ name = 'c'
+
+ paths = []
+ # read path list from /etc/ld-musl-$(ARCH).path
+ path_list = musl_ldso[0].replace('/lib/', '/etc/').replace('.so.1', '.path')
+ try:
+ with open(path_list, 'r') as fh:
+ paths = [path for line in fh for path in line.rstrip('\n').split(':') if path]
+ except:
+ paths = []
+ # default path list if /etc/ld-musl-$(ARCH).path is empty or does not exist
+ if not paths:
+ paths = ['/lib', '/usr/local/lib', '/usr/lib']
+
+ # prepend paths from LD_LIBRARY_PATH
+ if 'LD_LIBRARY_PATH' in os.environ:
+ paths = os.environ['LD_LIBRARY_PATH'].split(':') + paths
+
+ for d in paths:
+ f = os.path.join(d, name)
+ if _is_elf(f):
+ return os.path.basename(f)
+
+ prefix = os.path.join(d, 'lib'+name)
+ for suffix in ['.so', '.so.*']:
+ for f in glob('{0}{1}'.format(prefix, suffix)):
+ if _is_elf(f):
+ return os.path.basename(f)
+
else:
def _findSoname_ldconfig(name):