[ptxdist] how to integrate python modules using find_library

[ptxdist] how to integrate python modules using find_library

[Guillermo Rodriguez Garcia]

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Hi all,

Some python packages (e.g. soundfile) rely on find_library (from
ctypes.util) to resolve the name of a dynamic library at runtime in a
platform-independent way.

On Linux, the implementation of find_library [1] requires one of the
following:
 - ldconfig
 - gcc + objdump
 - ld + objdump

Neither of the above make much sense on an embedded target. Does anyone
have advice or recommendations on how to deal with such packages, short of
just patching the sources to avoid the use of find_library?

 [1]:
https://github.com/python/cpython/blob/e42b705188271da108de42b55d9344642170aa2b/Lib/ctypes/util.py#L309

Thanks,

Guillermo Rodriguez Garcia
guille.rodriguez@gmail.com

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Re: [ptxdist] how to integrate python modules using find_library

[Michael Olbrich]

On Tue, Nov 05, 2019 at 06:11:27PM +0100, Guillermo Rodriguez Garcia wrote:
> Some python packages (e.g. soundfile) rely on find_library (from
> ctypes.util) to resolve the name of a dynamic library at runtime in a
> platform-independent way.
> 
> On Linux, the implementation of find_library [1] requires one of the
> following:
>  - ldconfig
>  - gcc + objdump
>  - ld + objdump
> 
> Neither of the above make much sense on an embedded target. Does anyone
> have advice or recommendations on how to deal with such packages, short of
> just patching the sources to avoid the use of find_library?
> 
>  [1]:
> https://github.com/python/cpython/blob/e42b705188271da108de42b55d9344642170aa2b/Lib/ctypes/util.py#L309

Well, ldconfig should be useable. PTXdist optionally installs it to
generate the ld.so.cache, but it's quite large because it must be
statically linked.
I've no idea what else to use.

Michael

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