Re: [Mingw-users] Mingw, COM, JNI, MFC and threads

[<jr...@ei...>]

Paul,

    In your recent remarks you suggested several compile
options associated with the construction of DLLs in the
context of JNI.  Among them:

> 	a) verify that your mingw app is being compiled with -mthreads 
> (this provides a level of thread safety that doesn't exist when -
> mthreads is not used)
> 
> 	b) verify that your mingw app also has the -fvtable-thunks 
> enabled (this is to insure that the COM stuff is being 
> initialized properly)
> 
> 	c) verify that you have -fnative-structs defined

    1. Do these options seem to you as reasonable defaults for the
	construction of any DLL for use with java?

    2. Put differently, is there any reason not to use these as
	defaults for the construction of a JNI-implementing
	DLL?

    3. I certainly understand the implication of the
	"-fnative-structs" option, but can you be a little more
	specific about what is provided by "-mthreads" and
	"-fvtable-thunks".  For example, if I used "-mthreads"
	by default, am I simply giving up a little performance
	for the sake of prudence, or is there rather more to
	it?

If anyone else has any general perspective on building JNI
DLLs w/mingw, I should certainly like to hear it.

Thanks!

							-jrm