Two things on that subject.
First, I discussed a couple of hours with RMS at the Montr?al Linux Expo
2000, which just finished, and I asked him the famous question about the
GPL and LGPL being not very clear regarding dynamic linking.
He said that a dynamically linked binary executable counts as an “object
file” for the purpose of being in “re-linkable form”, at least, for the
libraries it is dynamically linked with. So providing a binary
dynamically linked with an LGPL library is okay (alone or in addition to
a statically linked version). This doesn’t save it from the GPL
requirements, of course, so according to the letter of the GPL, Linux
loadable modules should be GPLed too, but he also said that the only
person that can reasonably enforce the GPL is the holder of the
copyright, and that as Linus decided not to sue people that made
non-free loadable modules, that’s pretty much the end of story.
Second thing is more particularly aimed at Sam, but if anyone else knows
something, please let me know. I’d like to know if any commercial game
development outfit is using or plan to use SDL to develop games on
Windows, probably with the idea of a simple port to Linux later on
maybe? I am not thinking about companies making multiplatform games, I
am thinking particularly about the use of SDL (hey, we (Ludus Design)
do multiplatform games all right, so I know about it! 
).–
Pierre Phaneuf
Systems Exorcist
Pierre Phaneuf wrote:
Two things on that subject.
First, I discussed a couple of hours with RMS at the Montr?al Linux Expo
2000, which just finished, and I asked him the famous question about the
GPL and LGPL being not very clear regarding dynamic linking.
He said that a dynamically linked binary executable counts as an “object
file” for the purpose of being in “re-linkable form”, at least, for the
libraries it is dynamically linked with. So providing a binary
dynamically linked with an LGPL library is okay (alone or in addition to
a statically linked version). This doesn’t save it from the GPL
requirements, of course, so according to the letter of the GPL, Linux
loadable modules should be GPLed too, but he also said that the only
person that can reasonably enforce the GPL is the holder of the
copyright, and that as Linus decided not to sue people that made
non-free loadable modules, that’s pretty much the end of story.
Second thing is more particularly aimed at Sam, but if anyone else knows
something, please let me know. I’d like to know if any commercial game
development outfit is using or plan to use SDL to develop games on
Windows, probably with the idea of a simple port to Linux later on
maybe? I am not thinking about companies making multiplatform games, I
am thinking particularly about the use of SDL (hey, we (Ludus Design)
do multiplatform games all right, so I know about it! 
).
–
Pierre Phaneuf
Systems Exorcist
I’ve just completed a commercial game Reel Deal Slots, that uses the
SDL library among other LGPL’d libraries. Its really aimed at a Windows
market, but I prefer a Linux based development environment, so SDL pretty
much allowed me a Linux port for free.
The only complaint I have is that I haven’t yet found an easy way to debug
cross-platform, but I’m working on that :).
Jeremy Peterson.
www.phantomefx.com