ImportError: /usr/lib/python2.7/dist-packages/pyeclib_c.so: undefined symbol: liberasurecode_backend_available

[clayg]

Building pyeclib release 1.2.1 produces a *warning*

src/c/pyeclib_c/pyeclib_c.c: In function 'pyeclib_c_check_backend_available':
src/c/pyeclib_c/pyeclib_c.c:1185:5: warning: implicit declaration of function 'liberasurecode_backend_available' [-Wimplicit-function-declaration]
     if (liberasurecode_backend_available(backend_id)) {
     ^

and then doesn't work:

Traceback (most recent call last):
  File "/opt/ss/bin/swift-object-reconstructor", line 17, in <module>
    from swift.obj.reconstructor import ObjectReconstructor
  File "/usr/lib/pymodules/python2.7/swift/obj/reconstructor.py", line 42, in <module>
    from swift.obj.diskfile import DiskFileRouter, get_data_dir, \
  File "/usr/lib/pymodules/python2.7/swift/obj/diskfile.py", line 55, in <module>
    from swift.common.request_helpers import is_sys_meta
  File "/usr/lib/pymodules/python2.7/swift/common/request_helpers.py", line 32, in <module>
    from swift.common.storage_policy import POLICIES
  File "/usr/lib/pymodules/python2.7/swift/common/storage_policy.py", line 25, in <module>
    from pyeclib.ec_iface import ECDriver, ECDriverError, VALID_EC_TYPES
  File "/usr/lib/python2.7/dist-packages/pyeclib/ec_iface.py", line 29, in <module>
    from pyeclib_c import check_backend_available
ImportError: /usr/lib/python2.7/dist-packages/pyeclib_c.so: undefined symbol: liberasurecode_backend_available

It seems that pyeclib 1.2.1 requires a newer (unreleased) version of liberasurecode and doesn't know it - and then doesn't have the good sense not to build.

I'd be happy with just a release of liberasurecode that includes the needed bits:

https://github.com/openstack/liberasurecode/commit/c7a94df0724af30b26e3856f9c14344fc9b73a09

[clayg (clay-gerrard)]

this is all sorts of totally working for me now

[Kota Tsuyuzaki (tsuyuzaki-kota)]

The fix is proposed at https://review.openstack.org/#/c/351564/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/351564
Committed: https://git.openstack.org/cgit/openstack/pyeclib/commit/?id=10802bac59b694c0935e2b72ef47972ded702e76
Submitter: Jenkins
Branch: master

commit 10802bac59b694c0935e2b72ef47972ded702e76
Author: Kota Tsuyuzaki <email address hidden>
Date: Fri Aug 5 01:18:58 2016 -0700

    Add tox/requirements settings to pass gate job

    Plus, we need liberasurecode version handling for a few place because
    some tests/engine itself is broken with a lack of backword
    compatibility.

    Closes-Bug: #1586220

    Change-Id: I72adaefa10875a73e3e5304eb40fe5d9f6d2598a