Hallo!
The SNDOBJ variable in config.txt should point to the source package, where header files and the built library are in subfolders. I think it doesn't work out of the box for a installed distro package yet.
yes, also if I do: SNDOBJ=/usr/include/SndObj (where the header files are located) I get the same problem ...
but anyway, it's no problem for me, I only wanted to try something ...
Thanks, LG Georg