[MacPorts] #55569: sundials2 @2.7.0: Symbol not found: _klu_solve (was: cantera klu_solve missing symbol)

[MacPorts]

#55569: sundials2 @2.7.0: Symbol not found: _klu_solve
------------------------+-----------------
  Reporter:  jantheron  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  sundials2  |
------------------------+-----------------
Changes (by ryandesign):

 * cc: port, info, --maintainers, cantera-devel (removed)
 * cc: seanfarley (added)
 * keywords:  cantera klu_solve python27 =>
 * port:  cantera => sundials2


Old description:

> cantera fails upon importing to python27 with the following message
>
> ***********
> >>> import cantera as ct
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File
> "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
> /site-packages/cantera/__init__.py", line 4, in <module>
>     from ._cantera import *
> ImportError:
> dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
> /site-packages/cantera/_cantera.so, 2): Symbol not found: _klu_solve
>   Referenced from: /opt/local/lib/libsundials_cvodes.2.dylib
>   Expected in: flat namespace
>  in /opt/local/lib/libsundials_cvodes.2.dylib
> ***********

New description:

 cantera fails upon importing to python27 with the following message

 {{{
 >>> import cantera as ct
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/cantera/__init__.py", line 4, in <module>
     from ._cantera import *
 ImportError:
 dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
 /site-packages/cantera/_cantera.so, 2): Symbol not found: _klu_solve
   Referenced from: /opt/local/lib/libsundials_cvodes.2.dylib
   Expected in: flat namespace
  in /opt/local/lib/libsundials_cvodes.2.dylib
 }}}

--

Comment:

 For future reference, into the Cc field, you should place the maintainer's
 email address or GitHub handle. You can find this information by running
 the command `port info --maintainers [portname]`. Don't literally paste
 that command into the Cc field. Also, remember to use WikiFormatting when
 writing in Trac.

 Since the unknown symbol was referenced from a sundials2 library, I think
 this is probably a bug in the sundials2 port rather than the cantera port.
 The cantera source code does not contain the string `klu_solve` but the
 sundials2 source code does.

 I don't know if it has any bearing on the problem, but I'm suspicious of
 the use of the flat namespace, which has not been recommended for over a
 decade. I don't yet see where in the build system the flat namespace is
 being requested.

 I notice that the sundials libraries are being built with `-undefined
 dynamic_lookup`, which means that if there are any undefined symbols at
 build time, it doesn't complain about them, assuming that they will exist
 at runtime; in the case of `klu_solve` at least, that's apparently not
 happening. If I remove that flag from the build, then the build fails with
 undefined symbols errors, not unsurprisingly.

--
Ticket URL: <https://trac.macports.org/ticket/55569#comment:1>
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