Remove Dependencies to Allow the Zstd Binary to Dynamically Link to the Library #2977
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xxHash symbols are present in `libzstd.so`, but they are local and therefore unavailable outside the lib. There are two possible solutions to the problem. We could make those symbols global, or we could remove the dependency. This commit chooses the latter approach. I suppose this comes at the cost of code size / build time. I'm open to comments on whether this is a good thing to do, especially since this will apply even when we are statically linking everything.
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I'm not sure if this is a worthwhile goal either, |
Cyan4973
approved these changes
Jan 6, 2022
terrelln
approved these changes
Jan 7, 2022
felixhandte
changed the title
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Sorry, I didn't notice this PR before (GitHub doesn't email you when someone links a PR that may close your subscribed ticket). The general topic of dynamic linking I raised in #2976 and I also suggested a potential solution -- which does however require somewhat more long-term consideration and possible source code restructuring, but shouldn't have an effect on code size or build time. As far as fixing the meson setup goes, the program was already linking to both the shared library and directly to the xxhash built .o file. The unused include fix was probably enough to get that working. |
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This PR avoids dependencies on symbols that are not exported in the dynamic library.
I believe this works. However, I'm not sure that (a) this is really a worthwhile goal and (b) that this is a good solution for that goal. Your feedback is welcome.
This PR resolves #2950.