How to Build with MinGW64 on Windows 7
sisyphus1 at optusnet.com.au
Thu Dec 8 07:53:23 CET 2011
----- Original Message -----
From: "Thomas D. Dean"
> If I ./configure CC=gcc CXX=g++ --enable-cxx it works. However, the
> compiler arguments generated by configure contain -m32 and the resulting
> library is 32 bit.
> So the problem is in making a 64 bit library.
If any .asm files are listed at the end of the configure step, you know it's
going to fail (with 64-bit mingw compiler). Thankfully, even if you miss the
listing of those files, the failure occurs early on in the 'make' step - so
you haven't really wasted much time.
I think the earliest indication you get that it's not going to be what you
want is if you see 'ABI=32', but there maybe other telltale signs, too.
All I know is that the "--host=none-none-none ABI=longlong" seems to work
for me and for the person (JonY) who suggested it to me - see
http://permalink.gmane.org/gmane.comp.gnu.mingw.w64.general/352 for some
That's also where I picked up the
"--build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32" idea.
At that link it's specified as
"--build=i686-pc-mingw32 --host=x86_64-w64-mingw32", but that didn't seem
quite right when I tried it earlier today.
(Afaict, the --host=none-none-none means you won't get any assembly, and the
ABI=longlong ensures you get 64-bit limbs. I've never tested whether both
are needed. And there might be other ways to get the same result.)
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