[EMAIL PROTECTED] wrote: > On 8/30/07, Jonatan Liljedahl <[EMAIL PROTECTED]> wrote: >> Lucas C. Villa Real wrote: >>> On 8/30/07, Jonatan Liljedahl <[EMAIL PROTECTED]> wrote: >>>> The FFTW library is a little stupid, since it can be compiled with float >>>> (libfftw3f.a) or double (libfftw3f.a) precision, and also as static (.a) >>>> or shared (.so). The default is double and static, but some apps wants >>>> float, and I think I came across some app that wanted it shared but I'm >>>> not sure which one now... >>>> Anyhow, we need to be able to have both installed at the same time, so I >>>> suggest we call one FFTW and the other one FFTWf (with --enable-float >>>> config option). >>> Can't we just tweak the configure file and let it ship/compile both by >>> default? Seems more reasonable to me. >> That would be the best, but I don't know how to do that kind of tricks >> with autotools (which is, I guess, compiling same files with different >> DEFINES). I guess the easiest way to solve it is having two wrapper .c >> files, one for double and one for float precision, and in them do the >> define and include the real .c file, but this should be done by FFTW and >> not by us. >> >> But if you find a way to solve it by tweaking their autotools files, or >> perhaps with a hackish recipe, please go ahead. :) > > I think the simplest way would be the recipe which just compiles FFTW > twice. I suggest a metarecipe FFTW which includes two recipes, > FFTW-double and FFTW-float. I don't know if any app *needs* FFTW to be > linked statically; I'm guessing just building both libraries as shared > would be okay (if there's no configure flag set to tell it to compile > both at once).
The default FFTW configure builds it statically. I don't know much about autotools, but does it work equally with static and shared libs? I mean if an app says it wants libfftw, does it not care if it finds a shared or a static one? Does it choose one automatically? -- /Jonatan [ http://kymatica.com ] _______________________________________________ gobolinux-devel mailing list gobolinux-devel@lists.gobolinux.org http://lists.gobolinux.org/mailman/listinfo/gobolinux-devel
