Can't build a loadable plugin

[peter-jerry-ye]

Hi,

I tried to follow the steps in the document.

I created a file, copied all the code on the document, built it with the command. I got a dylib file (cause I'm on mac), I moved it where the other plugins are, but when I run the code that lists the plugins by name, I've only got rustls that I installed previously.

Is there any steps I'm missing?

[alabulei1]

@q82419 Could you please take a look? Thanks.

[hydai]

Hi @peter-jerry-ye

Please provide the reproduction steps you used and the plugin code. Since several plugins on macOS are shipped to our production environment, it should not be an issue.

[peter-jerry-ye]

Sure

• I created a file named plugin.c with the content here (uploaded txt due to github limit):
  plugin.txt
• I built the plugin with the command gcc -std=c11 -DWASMEDGE_PLUGIN -lwasmedge -shared -o libwasmedgePluginTest.dylib plugin.c (dylib cause I'm on macos)
• I moved the libwasmedgePluginTest.dylib to ~/.wasmedge/plugin/ where other plugins reside
• I created another file named test.c with the content here:
  test.txt
• I built the test.c with the command gcc -std=c11 -lwasmedge test.c
• I executed it with ./a.out

I was expecting to see the plugin I built being listed, but it only gave me

Number of loaded plug-ins: 1
plug-in 0 name: rustls

[hydai]

Hi @peter-jerry-ye
I can reproduce this issue. Could you try the CMake way instead to see if this issue is remaining?

[peter-jerry-ye]

Yes. I tried with the following CMakeLists.txt:

add_library(wasmedgePluginTest
  SHARED
  plugin.c
)

set_target_properties(wasmedgePluginTest PROPERTIES
  C_STANDARD 11
)

target_compile_options(wasmedgePluginTest
  PUBLIC
  -DWASMEDGE_PLUGIN
)

target_link_libraries(wasmedgePluginTest
  PRIVATE
  wasmedge
)

and cmake --build . and copied the generated dylib file, but nothing changed. It is still not in the plugin list.

[hydai]

Let's convert this to an issue. Something goes wrong with the C. The CPP part is working, and the wasi-nn/rustls are available.