Xmethods questions

Hi,

I'm working on gdb-7.11.1 targeted for x86_64 and sparc-rtems

My question: is it possible to also 'replace' normal C methods?

I've started with the example suggested here:

https://sourceware.org/gdb//onlinedocs/gdb/Writing-an-Xmethod.html

but it seems to me that no overload take place. Here the
config/files/result for arch x86_64-pc-linux-gnu (host):

https://gist.github.com/anonymous/d9bc54950b9c55b89db6832c83aa6549

I've also trouble with the testsuite/gsb.python/py-xmethod.exp but for
now I think it's sufficient.

Thanks for your attention