[yocto] yocto package naming

[Simon Ruetzler]

Hello,
I want to create different packages from one recipe.

This is working except for one package.
I addes this package with
PACKAGES += " ${PN}-demo"
and I expected that it is named with the recipe name and demo. In this 
case rumo-cpp-demo-1.0-rc...
But the name is libscom1-1.0-rc..

The demo package contains the files for a dynamic library: libscom.so, 
libscom.so.1 and libscom.so.1.5.0
and this library name is automatically used for the package name.

For the other packages the name are as expected. All package are defined 
in the same way except that FILES_.. definition is different.
This packages also have dynamic libs but only the libname.so.1 files and 
the libname.so as a link.

Why is the demo package created with the libscom name? How can I disable 
this?

Regards Simon