pkg/52749: Suggested configuration change for math/fftw package

[ray.phillips%gmail.com@localhost]

>Number:         52749
>Category:       pkg
>Synopsis:       Suggested configuration change for math/fftw package
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Tue Nov 21 23:40:00 +0000 2017
>Originator:     Ray
>Release:        fftw-3.3.6pl1 for NetBSD/amd64 7.1
>Organization:
>Environment:
NetBSD b2.home 7.1 NetBSD 7.1 (GENERIC.201703111743Z) amd64
>Description:
I've asked this question on the pkgsrc-users mailling list already:

http://mail-index.netbsd.org/pkgsrc-users/2017/11/19/msg025846.html

Apologies if there's no need to also create a PR concerning it

------------------------------------------------------------

I wonder if the fftw binary package could be compiled using the
--enable-float option  ?  At the moment it hasn't been, as far as I
can tell (fftw-3.3.6pl1 is the package I've installed).

Would there be any drawbacks in doing that?

I ask because I've tried to install LALSuite [1] on NetBSD/amd64 7.1
and not only is one of its core dependencies FFTW, but its configure
script demands to have the floating-point version of the library.  The
last couple of lines of its output when attempting to use the binary
package were:

checking for FFTW3... no
checking for fftwf_execute_dft in -lfftw3f... no
configure: error: could not find the fftw3f library

Searching /usr/pkg for a file name containing fftw3f drew a blank.

However, LALSuite's configure was happy when I installed FFTW from
source using the  --enable-float  configuration option:

checking for FFTW3... yes
checking for fftwf_execute_dft in -lfftw3f... yes
checking for fftw_execute_dft in -lfftw3... yes
checking fftw3.h usability... yes
checking fftw3.h presence... yes
checking for fftw3.h... yes


Ray

[1]  https://wiki.ligo.org/DASWG/LALSuite
>How-To-Repeat:

>Fix: