I am in the process of building a shared object which needs to link to a function to a shared object (libstdc++). This function is exported as WEAK and has also a default version (func@@V1).
When I build an executable I can use the gcc asm directive to forcefully link to that specific revision, i.e.

__asm__(".symver func,func@V1")

And the executable not only builds fine and looking as the symbols with readelf -Wa I can see it’s requiring func@V1.
If instead I try to build the same code as a shared object (with flags -fPIC and -shared), I get the following error:

No symbol version section for versioned symbol func@V1

If I then remove the __asm__ symver directive I can link the shared object, but the linkage to func is unversioned (i.e. looking at the shared object with readelf -Wa I can see a reference to func but not func@V1).

Why is it?
Is there a way to have the shared object link to a versioned WEAK symbol?

Thanks

Ps. The function is a C++ function exported by libstdc++.so.6, but I wanted to keep the example simple to understand