Date: Thu, 12 Feb 2015 16:12:17 -0800 From: Craig Rodrigues <rodrigc@FreeBSD.org> To: freebsd-python@freebsd.org Subject: ctypes problem loading libc.so on FreeBSD current Message-ID: <CAG=rPVehh4ZBBKdmJb8tVy_H=CgbALwUqcC7yofwrJHPVC-1zQ@mail.gmail.com>
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Hi, I am looking at this blog post for loading libc with ctypes: http://blogs.freebsdish.org/rpaulo/2008/11/30/sysctlbyname3-and-others-from-python/ I am using this version of python from ports: Name : python Version : 2.7_2,2 Installed on : Mon Jan 12 22:10:27 PST 2015 Origin : lang/python Architecture : freebsd:11:x86:64 Prefix : /usr/local Categories : python lang ipv6 Licenses : Maintainer : python@FreeBSD.org WWW : http://www.python.org/ Comment : The "meta-port" for the default version of Python interpreter Annotations : repo_type : binary repository : FreeBSD Flat size : 38.0B Description : Python is an interpreted object-oriented programming language, and is often compared to Tcl, Perl or Scheme. This is a meta port to the Python interpreter and provides symbolic links to bin/python, bin/pydoc, bin/idle and so on to allow compatibility with version agnostic python scripts. WWW: http://www.python.org/ I have this test program import ctypes mylib = ctypes.CDLL("libc.so") print(mylib) On FreeBSD 9, this program works, and I get a handle to libc.so. On FreeBSD-CURRENT, I get this: File "a.py", line 3, in <module> mylib = ctypes.CDLL("libc.so") File "/usr/local/lib/python2.7/ctypes/__init__.py", line 365, in __init__ self._handle = _dlopen(self._name, mode) OSError: /usr/lib/libc.so: invalid file format The problem seems to be that on FreeBSD 9, /usr/lib/libc.so is a symlink to /lib/libc.so.7, while on FreeBSD-CURRENT, /usr/lib/libc.so contains this: /* $FreeBSD: head/lib/libc/libc.ldscript 258283 2013-11-17 22:52:17Z peter $ */ GROUP ( /lib/libc.so.7 /usr/lib/libc_nonshared.a /usr/lib/libssp_nonshared.a ) Any ideas what the problem is? -- Craig
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