[Python-Dev] Use of objdump within ctypes _get_soname() (original) (raw)

Gregory P. Smith greg at krypto.org
Tue Oct 9 03:12:55 EDT 2018

On Mon, Oct 8, 2018 at 11:59 PM Ray Donnelly <mingw.android at gmail.com> wrote:

Hi,

We ran into an issue on the Anaconda Distribution recently where we added libarchive-c to conda-build (so we can un-compress more source archive formats than tarfile supports) and everything was good a few hours, until it hit various CI systems where objdump is not installed. I was a bit surprised by this dependency and wondered if there'd be interest in a fallback path that inspects the elf with some fairly simple python code to determine the soname instead? I have code that works already - though it could do with and a tidy up - and has been tested on a variety of architectures. Would CPython be interested in an attempt to upstream this? Is it documented anywhere that objdump is needed to load some extension modules on Linux?

Wow, that looks like gross code buried within ctypes.util (which libarchive-c uses) that calls various platforms versions of objdump or equivalent. File a bugs.python.org issue and submit a PR, native ELF header reading code for this makes sense.

-G

Best regards, Ray Donnelly, Anaconda Inc,

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