Porting MinGW multithreading bugfix to makefile.mingw

[phelixbtc]

Original fix:
8864019

[BitcoinPullTester]

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[sipa]

The makefile buildsystem has since been replaced by autotools in git master. Does autotools do this right, or do we need an equivalent fix there?

[Diapolo]

@theuni Can you take a look?

[laanwj]

I suppose this is useful for @luke-jr for his stable branch.

As for the autotools build system this change is not needed. mingwthrd is detected and -D_MT is added:
https://github.com/bitcoin/bitcoin/blob/master/configure.ac#L194

[theuni]

yes, autotools should be handling this correctly already.

[theuni]

Note that I could not find any testers for native win32+autotools. @phelixbtc If you'd be willing to be a guinea pig, I'm happy to get it working there.

[phelixbtc]

I'll try my very best. Should I start out with current master?

[theuni]

Yes. Are you available to hop on freenode for a realtime hack-a-thon?

[phelixbtc]

@theuni: tried to email you... contact me at blockchained.com

I assume this will not go into 0.8.5 then...

[luke-jr]

0.8.5 is already released weeks ago. It'll probably be in 0.8.6, but that may be after 0.9.0

[gavinandresen]

Closing; makefile.mingw is no more.