Plugin compilation warning
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Hi. I'm trying the example at https://extism.org/docs/write-a-plugin/js-pdk. When I compile the plugin, I get:
warning: unknown name subsection with id 9 at 3197029
This is using version 0.5.0 of the extism-js
compiler, on Linux x64. (Ubuntu 22.04 on WSL)
It does produce a wasm file, but that file doesn't work in my Golang host. I get the following when attempting to load the plugin:
module[wasi_snapshot_preview1] not instantiated
However, if I use the precompiled wasm sample files from https://github.com/extism/extism/tree/main/wasm my host works fine.
I figured out that I need to pass EnableWasi: true
to extism.PluginConfig
when loading in my host. Now it works fine. Still, I'm not sure what causes the warning during compilation or if I need to worry about that.
warning: unknown name subsection with id 9 at 3197029
This is just a warning saying that the runtime does not recognize a custom section added to the module. This is okay as the custom section is just some extra metadata. It's something happening because of a tool we are using under the hood but should go away soon. Thanks for reporting though!
I figured out that I need to pass EnableWasi: true to extism.PluginConfig when loading in my host.
Good to hear! Yes, js plug-ins need wasi enabled right now unfortunately. However they don't actually need to use the filesystem or network unless your plug-in does.