Niall Douglas wrote:
However, the above isn't as it seems. Libraries such as zlib are heavily reused and so their weight should be much higher and I think total source lines under the license should also be taken account of - therefore, every copy of the Linux kernel would have portions removed as they're under a more permissive license than the GPL (eg; zlib).
Well, if you count according to frequency of use, I think the GPL wouldn't fare too badly: Linux (kernel; except for zlib if you will), bash, GNOME, KDE, GCC. What else do most users use at all (just kidding)? ;-) Perhaps glibc and X11 would be the most serious competitors.
Frank