I just tried to compile package kphone-4.2-4 with a prerelease of the
GNU C compiler version 4.1. It said

1.

iCBSearch.cpp:130: warning: operation on "pp" may be undefined

The source code is

               for (j=0; j<lTarget; j++) {
                   *ppe+=(*pp)*(*pp++);
               }

I agree with the compiler - this code seems to be undefined. 

Suggest new code

               for (j=0; j<lTarget; j++) {
                   *ppe+=(*pp)*(*pp);
					++pp;
               }
2.

iCBSearch.cpp:325: warning: operation on "pp" may be undefined

Duplicate.

BTW, it seems that the orignal author [ vektor@div8.net ]
is no longer the maintainer of the code.