cmake HAVE_FFT examples

snl-dakota/dakota cmake/DakotaOptions.cmake :196 

option(HAVE_FFT "Use either the fftw or dfftpack packages" ON)

snl-dakota/dakota cmake/DakotaOptions.cmake :197 

option(HAVE_DFFTPACK "Build the dfftpack package.  This OPTION has no effect if
  HAVE_FFT is OFF" ON)

snl-dakota/dakota cmake/DakotaOptions.cmake :199 

option(HAVE_FFTW "Find and use an installed fftw package. This OPTION has no
  effect if HAVE_FFT is OFF" OFF)

snl-dakota/dakota packages/CMakeLists.txt :41 

endif(HAVE_FFT)