How to get name of brother deb packages which build from a source package

[Eric Zhong <ericiszhongwenjia@gmail.com>]

Somebody give me some debs, I want to auto-check if lost some debs which build from same source package.

Example: 

I have souce package:  

    gcc-defaults_1.124ubuntu6.dsc

    gcc-defaults_1.124ubuntu6.tar.gz

and debs build from it:

    g++_4%3a4.8.2-1ubuntu6_amd64.deb

    gcc_4%3a4.8.2-1ubuntu6_amd64.deb

    gcc-doc_4%3a4.8.2-1ubuntu6_amd64.deb

    gccgo_4%3a4.9-1ubuntu6_amd64.deb

    ...

but I have not:

    gobjc_4%3a4.8.2-1ubuntu6_amd64.deb

How to check ? Are there some commands deal with it easy ?