One of the reasons that I prefer Exuberant Ctags over GNU GLOBAL (yet) is because it doesn't index my C inline functions. And I use lot of them in some parts of my projects. It would be superb if it did.
I know quit a lot about programming in C/C++ with the GNU toolchain and also a bit about flex/bison.
Perhaps I could fix it if you only told me which files/functions/variables I need to dig into and alter to enable this feature.
Example function that doesn't get added to database (yet)