[ofiwg] libverbs static vs. dynamic linkage issue for CentOS 7.6
jgg at ziepe.ca
Mon Jun 3 06:48:13 PDT 2019
This sounds like your dynamic library is not being linked to
Add -Wl,--no-undefined to all your compiler flags and fix any errors
that come up.
On Sat, Jun 01, 2019 at 07:45:02PM -0400, Anthony Skjellum wrote:
> I am having truly weird experiences as follows
> 1) My library, when statically linked, works fine with libverbs
> 2) My library, when dynamically linked, provides unpredictable errors
> with libverbs
> 3) My test programs, in main(), dynamically linked with libverbs, work
> This has been reproduced in several Centos 7.6 InfiniBand networks.
> I have done extensive debugging; as more and more functions move into
> main(), my program runs further. Typically, I either segmentation
> violate inside libverbs ibv_ calls, or I get errno=9 in my library,
> depending on how much code has moved into the statically compiled main
> or library.
> All my code runs fine with a dynamically built main, a statically built
> library (my product), and -libverbs dynamically linking.
> Is there any known set of conditions that produces such a situation
> with recent libverbs?
> Any specific things to look out for with readelf that would indicate
> that libfabrics is not going to link properly with a dynamic library?
> I've read extensively on inter-dll dependencies and proper linking.
> What's the best practice according to the developers of this library ?
> Thank you,
> Tony Skjellum
> 1. mailto:skjellum at gmail.com
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