wasmer: Linux: Missing SONAME in "libwasmer.so" hinders usage in CMake

The shared library libwasmer.so does not have an SONAME specified. This can be checked using this command: objdump -p libwasmer.so | grep SONAME

When libwasmer.so is consumed in CMake, the linker produces a wrong output file due to the missing SONAME. There is a workaround for this in CMake, but according to a reply from the CMake folks, the missing SONAME is a bug that must be fixed by the library provider: https://gitlab.kitware.com/cmake/cmake/-/issues/22307#note_971562 “The libwasmer.so file should have a SONAME. If it doesn’t, that’s a bug in the wasmer package”

The problem is inherent for all Rust builds of cdylibs: https://github.com/rust-lang/cargo/issues/5045 The Rust community did not fix this since 2018 (see issue above), but fortunately it’s easy to fix for library creators. You just need to put the following code into the build.rs of the library:

if cfg!(target_os = "linux") {
    println!("cargo:rustc-cdylib-link-arg=-Wl,-soname,libwasmer.so");
}

I tried putting these lines into lib/c-api/build.rs, and then libwasmer.so was built correctly, including a SONAME entry.

Could you please fix this issue?

Thanks Martin