llrint implementation in Cygwin
Mon Oct 29 11:19:00 GMT 2007
Tim Prince <tprince <at> computer.org> writes:
> Diego Biurrun wrote:
> > Hi!
> > I have noticed that Cygwin does not implement llrint. However, llrint
> > is part of C99 and not having it available makes some applications (for
> > example MPlayer and FFmpeg) fail to compile.
> > Are there any plans to implement llrint (in the near future)?
> Perhaps if you would submit a patch to newlib, something may happen.
> It's not difficult to back-port stand-alone from recent gcc if you don't
> want to wait for cygwin to include a gcc upgrade, about which there have
> been plenty of threads here. You could include it in a <mathinline.h>
> of your choice.
> shows that it has been available for 2.5 years.
I found another way: leverage the llrint() implementation in MinGW.
a) We need first to download the mingw-runtime Cygwin package.
b) Then we create a small library:
ar x /usr/lib/mingw/libmingwex.a llrint.o
ar cq /usr/local/lib/libllrint.a llrint.o
c) And finally, we use that library in FFmpeg configure line:
--extra-ldflags='-L /usr/local/lib' --extra-libs='-l llrint'
It might not be the most elegant solution, but it is strightforward, and
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