This works around a bug in NVIDIA's implementation of
glXSwapIntervalEXT, where it ignores updates to what it *thinks* is the
current value, even though glXQueryDrawable returns a different value.
Bug reported to NVIDIA and will hopefully be a part of 319.xx.
Also a fix for invalidly treating glXSwapIntervalEXT as having an int
return value (it's void).
The attached patch changes configure.in to use "-framework FOO" instead of
"-Wl,-framework,FOO".
This avoid some issues with certain versions of libtool that do not handle
-framework properly.
Some versions of libtool will try to reorder the two parts of the option, or
render the 2nd part of the argument to the relative path of a non-existent
library.
Note: It is not enough if SDL uses a version of libtool that does this
correctly, because these -framework options show up in "sdl-config --libs".
Hence, some 3rd party apps which still ship with an old libtool have troubles
compiling under Mac OS X.
