[CoinBinary] Building JNI-based under MinGW

[acw at ascent.com]

I appreciate the response, and figured from the delay that it wasn't an 
easy task to port to Win64.  For the moment, at least, we are just going 
to run in 32-bit mode on 64-bit platforms; eventually, the MinGW 
community's compiler technology will catch up.  I did, in fact, try to 
build from source using one 64-bit MinGW GCC, but wasn't even able to 
diagnose the failures I was getting -- it was way outside my area of 
expertise, whatever that is.

Another thing we should be keeping our eyes on is exception-handling 
architecture.  At the moment, CoinBinary is doing its building with the 
deprecated SjLj architecture, rather than the modern Dwarf 2 architecture, 
which has two disadvantages: 1. it ties you to a compiler branch which is 
not being actively maintained by the MinGW developers; and 2. SjLj incurs 
a processing cost whenever you enter the scope of an exception handler, 
regardless of whether the exception occurs.  (Dwarf 2 has no processing 
cost for merely entering the scope of a handler; all costs are incurred 
when the exception is actually thrown.  I don't know how they managed 
that.)  I didn't understand the explanation of why CoinBinary projects 
can't be built with a Dwarf 2 compiler, though I am certainly willing to 
believe there are difficulties.  These difficulties must be surmounted 
eventually, though, because it doesn't look as if anyone wants to spend 
any energy maintaining the SjLj compiler.

Anyway, we're certainly up and running for the moment, so this is really 
only a theoretical issue.  Thanks for all the help you've given.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/coinbinary/attachments/20120726/1a5f2dbc/attachment-0001.html>