[SDL] Building without -mno_cygwin

[Ben Wilhelm]

I'm trying to build SDL on Cygwin without -mno_cygwin. I seem to have 
mostly gotten it working - it builds and runs fine without any need for 
that flag. Is there a standard SDL test suite I can run? Also, who would 
I talk to to get my (as yet not quite complete, but working on it) patch 
submitted?

The reason I wanted this is because -mno_cygwin is kind of a hack to 
sidestep Cygwin's libraries, and if you use it, any libraries you want 
to use afterwards must be specially built with that flag. Letting it 
build natively without -mno_cygwin would let it integrate entirely into 
the Cygwin framework, as well as letting it be included under the Cygwin 
package manager. (If I can get this added to SDL, the next thing I'll do 
is try to get it added under the Cygwin package manager.)

Specifically, I've had to make my own custom builds of both libogg and 
boost in order to make my game function under Cygwin. Obviously this 
isn't quite ideal, and this (surprisingly simple so far) patch of mine 
lets my game run without a flaw with the native Boost (I have libogg 
disabled at the moment since I'll need to rebuild it, but I don't 
foresee any issues.)

My patch is to the 1.3.0 branch, and I'm not sure how maintained that 
currently is. I ran into a huge number of errors trying to make it for 
1.2.1 and decided to see if 1.3.0 was easier. I could try backporting it 
to 1.2.1 if anyone wanted me to.

If there's interest, I'll clean it up and post it on the list. It's 
really quite small and appears to work great.

-Ben