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Backport https://github.com/python/cpython/commit/82df3b3071bb003247c33eac4670775e9883c994
and https://github.com/python/cpython/commit/27ac19cca2c639caaf6fedf3632fe6beb265f24f
Fixes the check phase of python2Packages.cffi.
--- a/Lib/ctypes/util.py
+++ b/Lib/ctypes/util.py
@@ -87,6 +87,12 @@ elif os.name == "posix":
# Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump
import re, tempfile, errno
+ def _is_elf(filename):
+ "Return True if the given file is an ELF file"
+ elf_header = b'\x7fELF'
+ with open(filename, 'rb') as thefile:
+ return thefile.read(4) == elf_header
+
def _findLib_gcc(name):
# Run GCC's linker with the -t (aka --trace) option and examine the
# library name it prints out. The GCC command will fail because we
@@ -110,10 +116,17 @@ elif os.name == "posix":
# the normal behaviour of GCC if linking fails
if e.errno != errno.ENOENT:
raise
- res = re.search(expr, trace)
+ res = re.findall(expr, trace)
if not res:
return None
- return res.group(0)
+
+ for file in res:
+ # Check if the given file is an elf file: gcc can report
+ # some files that are linker scripts and not actual
+ # shared objects. See bpo-41976 for more details
+ if not _is_elf(file):
+ continue
+ return file
if sys.platform == "sunos5":
@@ -237,8 +250,37 @@ elif os.name == "posix":
def _findSoname_ldconfig(name):
return None
+ def _findLib_ld(name):
+ # See issue #9998 for why this is needed
+ expr = r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)
+ cmd = ['ld', '-t']
+ libpath = os.environ.get('LD_LIBRARY_PATH')
+ if libpath:
+ for d in libpath.split(':'):
+ cmd.extend(['-L', d])
+ cmd.extend(['-o', os.devnull, '-l%s' % name])
+ result = None
+ try:
+ p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE,
+ universal_newlines=True)
+ out, _ = p.communicate()
+ res = re.findall(expr, out)
+ for file in res:
+ # Check if the given file is an elf file: gcc can report
+ # some files that are linker scripts and not actual
+ # shared objects. See bpo-41976 for more details
+ if not _is_elf(file):
+ continue
+ return file
+ except Exception:
+ pass # result will be None
+ return result
+
def find_library(name):
- return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name))
+ # See issue #9998
+ return _findSoname_ldconfig(name) or \
+ _get_soname(_findLib_gcc(name)) or _get_soname(_findLib_ld(name))
################################################################
# test code
|