Re: [Mjpeg-users] Manually setting host CPU for mjpegtools

[Bernhard P. <sha...@ut...>]

Hallo


LRN wrote:
> I'm building mjpegtools with mingw32 gcc 4.5.2 and msys.
> When i configure it as-is, it detects my cpu as core2 (which is correct)
> and compiles with -mcpu=core2 -mtune=core2
> It is commendable. However, i would like to compile a version that will
> run on any more-or-less contemporary device, which means either
> -mtune=i686 or -mtune=generic
> I've tried building with --host=i686-pc-mingw32 (that is how mingw32
> often identifies itself), but hit the problem with sigjmp_buf being
> undefined (googling for it didn't do any good), and generic-pc-mingw32
> fails outright, since `generic' is not a correct cpu.
> So, in the end i want two things:
> 1) -mtune=generic
> 2) undefined HAVE_X86_CPU, which will prevent sigjmp_buf-related code
> from being compiled

Export the compiler options, that should work on Linux boxes:
export CFLAGS="-march=core2 -mtune=core2"

adding the options to the configure script should also work:
./configure CFLAGS="-mtune=generic -O2

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: sha...@ut...
www: http://www.lysator.liu.se/~gz/bernhard