[PD-dev] fftw3 update to configure.am

[Miller Puckette]

OK... fftw it is.  Pushed to http://msp.ucsd.edu/tmp/pd-tmp.src.tar.gz
and git://git.code.sf.net/p/pure-data/pure-data...

Anyone willing to try it?  I'd like to 'release' in the next couple of days.

cheers
Miller

On Sun, Jan 18, 2015 at 03:15:19PM -0500, Chris Clepper wrote:
> fftw2 hasn't been updated since 1999!  I think it is safe to use fftw3
> now...
> 
> On Sun, Jan 18, 2015 at 2:24 PM, Miller Puckette <msp at ucsd.edu> wrote:
> 
> > Hi Chuck -
> >
> > It looks like this would then no longer work with fftw2 - is this a
> > problem, or is fftw3 widely enough distributed now that nobody will
> > need fftw2 comatibility?
> >
> > thanks
> > Miller
> >
> > On Sun, Jan 18, 2015 at 12:59:14PM -0600, Charles Z Henry wrote:
> > > pd-0.45.4 has the right code for FFTW3 but has the wrong configure.ac
> > > code to test for it.
> > >
> > > fftw_one is a function in FFTW2, which plans a 1D FFT.  The comparable
> > > function in FFTW3 is fftw_plan_dft_1d
> > >
> > > To get this to configure properly, you only need to change the name of
> > > the library and the function it looks for.  For the single precision
> > > fftw3 library ( libfftw3f.so ) the function is named
> > > sfftw_plan_dft_1d_ or sfftw_plan_dft_1d__
> > >
> > > Before filing a bug, I wanted to get another set of eyes on it.  Does
> > > that function name look suspicious to anyone else?  I've confirmed the
> > > symbol is the same in the system installed 3.3.3 version of the
> > > library in ubuntu 14.04 and the custom compiled 3.3.4 version that I'm
> > > using.
> > >
> > > To fix:
> > >
> > > This section of code in configure.ac:
> > > dnl fftw v2
> > > AC_ARG_ENABLE([fftw],
> > >         [AS_HELP_STRING([--enable-fftw],
> > >                 [use FFTW package])],
> > >     [fftw=$enableval])
> > > if test x$fftw = xyes; then
> > >     AC_CHECK_LIB(fftw, fftw_one, [LIBS="$LIBS -lfftw"],
> > >         [AC_MSG_NOTICE([fftw package not found - using built-in FFT]);
> > fftw=no])
> > > fi
> > > AM_CONDITIONAL(FFTW, test x$fftw = xyes)
> > >
> > > becomes
> > >
> > > dnl fftw v3
> > > AC_ARG_ENABLE([fftw],
> > >         [AS_HELP_STRING([--enable-fftw],
> > >                 [use FFTW package])],
> > >     [fftw=$enableval])
> > > if test x$fftw = xyes; then
> > >     AC_CHECK_LIB(fftw3f, sfftw_plan_dft_1d_, [LIBS="$LIBS -lfftw3f"],
> > >         [AC_MSG_NOTICE([fftw package not found - using built-in FFT]);
> > fftw=no])
> > > fi
> > > AM_CONDITIONAL(FFTW, test x$fftw = xyes)
> > >
> > > Then, I run:
> > > ./autogen.sh
> > >
> > > and
> > >
> > > ./configure --enable-jack --prefix=/home/chenry/pd-0.45.4
> > > --enable-fftw CFLAGS=-I/home/chenry/linalg/include
> > > LDFLAGS=-L/home/chenry/linalg/lib
> > >
> > > Chuck
> > >
> > > _______________________________________________
> > > Pd-dev mailing list
> > > Pd-dev at lists.iem.at
> > > http://lists.puredata.info/listinfo/pd-dev
> >
> > _______________________________________________
> > Pd-dev mailing list
> > Pd-dev at lists.iem.at
> > http://lists.puredata.info/listinfo/pd-dev
> >

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