Linuxconf sources relies on some tools built at Solucorp years ago. These tools used to be commercial product. I intend to publish them under the GPL licenses as soon as I have some spare time (spare time, interesting concept ?). In the mean time, you can grab a binary only package and use it for any project. Please do not distribute it until I publish a real GPL (with source) package.
The main utility in this package is called proto. It is a sophisticated prototype extractor. As far as I know, nothing even scratch what it does. I don't think any prototype extractor is available for C++ anyway.
The package contain full documentation on the utility (it can extract much more than prototypes in fact). Have fun.