[MacPorts] #70996: pHash uses fftw without declaring a dependency and fails to link to it: Undefined symbols: _fftw_init_threads

[MacPorts]

#70996: pHash uses fftw without declaring a dependency and fails to link to it:
Undefined symbols: _fftw_init_threads
--------------------------+--------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.10.1
 Keywords:                |       Port:  pHash
--------------------------+--------------------
 {{{
 mv -f .deps/pHash.Tpo .deps/pHash.Plo
 /bin/sh ../libtool  --tag=CXX   --mode=link ccache /usr/bin/g++-4.2  -pipe
 -Os -arch ppc -ffast-math -O3 -no-undefined
 -Wl,-headerpad_max_install_names -L/opt/local/lib -lMacportsLegacySupport
 -arch ppc -L/usr/local/lib -o libpHash.la -rpath /opt/local/lib pHash.lo
 audiophash.lo ph_fft.lo cimgffmpeg.lo  -lmpg123 -lsamplerate -lsndfile
 -lswscale -lavformat -lavutil -lavcodec   -lpng -ljpeg -lfftw3
 libtool: link: ccache /usr/bin/g++-4.2 -dynamiclib  -o
 .libs/libpHash.0.dylib  .libs/pHash.o .libs/audiophash.o .libs/ph_fft.o
 .libs/cimgffmpeg.o   -L/opt/local/lib -lMacportsLegacySupport
 -L/usr/local/lib /opt/local/lib/libmpg123.dylib
 /opt/local/lib/libsamplerate.dylib /opt/local/lib/libsndfile.dylib
 -lswscale -lavformat -lavutil -lavcodec /opt/local/lib/libpng16.dylib
 -ljpeg /opt/local/lib/libfftw3.dylib  -Os -arch ppc -O3
 -Wl,-headerpad_max_install_names -arch ppc   -install_name
 /opt/local/lib/libpHash.0.dylib -compatibility_version 1 -current_version
 1.0 -Wl,-single_module
 Undefined symbols:
   "_fftw_init_threads", referenced from:
       __static_initialization_and_destruction_0(int, int)in pHash.o
       __static_initialization_and_destruction_0(int, int)in audiophash.o
       __static_initialization_and_destruction_0(int, int)in cimgffmpeg.o
 ld: symbol(s) not found
 collect2: ld returned 1 exit status
 }}}

 P. S. Also needs legacysupport for strnlen, at least.

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Ticket URL: <https://trac.macports.org/ticket/70996>
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