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## This is heavily based on the FindFFTW.cmake from itk...
##
## FFTW can be compiled and subsequently linked against
## various data types.
## There is a single set of include files, and then muttiple libraries,
## One for each type. I.e. libfftw.a-->double, libfftwf.a-->float, libfftwl.a -->long double
##
## The following logic belongs in the individual package
## MARK_AS_ADVANCED(USE_FFTWD)
## OPTION(USE_FFTWD "Use double precision FFTW if found" ON)
## MARK_AS_ADVANCED(USE_FFTWF)
## OPTION(USE_FFTWF "Use single precision FFTW if found" ON)
## MARK_AS_ADVANCED(USE_FFTWL)
## OPTION(USE_FFTWF "Use long double precision FFTW if found" ON)
## MARKS_AS_ADVANCED(USE_FFTW_THREADS)
## OPTION(USE_FFTW_THREADS "Try to find FFTW with thread support" ON)
IF(USE_FFTWD OR USE_FFTWF OR USE_FFTWL)
MESSAGE(STATUS "Checking for libfftw.")
SET(FFTW_INC_SEARCHPATH
/sw/include
/usr/include
/usr/local/include
/usr/include/fftw
/usr/local/include/fftw
/opt/include/fftw
/opt/local/include/fftw
)
FIND_PATH(FFTW_INCLUDE_PATH fftw3.h ${FFTW_INC_SEARCHPATH})
IF(FFTW_INCLUDE_PATH)
SET(FFTW_INCLUDE ${FFTW_INCLUDE_PATH})
ENDIF (FFTW_INCLUDE_PATH)
IF(FFTW_INCLUDE)
INCLUDE_DIRECTORIES( ${FFTW_INCLUDE})
ENDIF(FFTW_INCLUDE)
GET_FILENAME_COMPONENT(FFTW_INSTALL_BASE_PATH ${FFTW_INCLUDE_PATH} PATH)
SET(FFTW_LIB_SEARCHPATH
${FFTW_INSTALL_BASE_PATH}/lib
/usr/lib/fftw
/usr/local/lib/fftw
/opt/lib/fftw
/opt/local/lib/fftw
)
IF(USE_FFTWD)
MARK_AS_ADVANCED(FFTWD_LIB)
# OPTION(FFTWD_LIB "The full path to the fftw3 library (including the library)" )
FIND_LIBRARY(FFTWD_LIB fftw3 ${FFTW_LIB_SEARCHPATH}) #Double Precision Lib
IF (USE_FFTW_THREADS)
FIND_LIBRARY(FFTWD_THREADS_LIB fftw3_threads ${FFTW_LIB_SEARCHPATH}) #Double Precision Lib only if compiled with threads support
ENDIF(USE_FFTW_THREADS)
IF(FFTWD_LIB)
SET(FFTWD_FOUND 1)
IF(FFTWD_THREADS_LIB)
SET(FFTWD_LIB ${FFTWD_LIB} ${FFTWD_THREADS_LIB} )
ENDIF(FFTWD_THREADS_LIB)
ENDIF(FFTWD_LIB)
ENDIF(USE_FFTWD)
IF(USE_FFTWF)
MARK_AS_ADVANCED(FFTWF_LIB)
# OPTION(FFTWF_LIB "The full path to the fftw3f library (including the library)" )
FIND_LIBRARY(FFTWF_LIB fftw3f ${FFTW_LIB_SEARCHPATH}) #Single Precision Lib
IF (USE_FFTW_THREADS)
FIND_LIBRARY(FFTWF_THREADS_LIB fftw3f_threads ${FFTW_LIB_SEARCHPATH}) #Single Precision Lib only if compiled with threads support
ENDIF(USE_FFTW_THREADS)
IF(FFTWF_LIB)
SET(FFTWF_FOUND 1)
IF(FFTWF_THREADS_LIB)
SET(FFTWF_LIB ${FFTWF_LIB} ${FFTWF_THREADS_LIB} )
ENDIF(FFTWF_THREADS_LIB)
ENDIF(FFTWF_LIB)
ENDIF(USE_FFTWF)
IF(USE_FFTWL)
MARK_AS_ADVANCED(FFTWL_LIB)
# OPTION(FFTWF_LIB "The full path to the fftw3l library (including the library)" )
FIND_LIBRARY(FFTWL_LIB fftw3l ${FFTW_LIB_SEARCHPATH}) #Long Double Precision Lib
IF (USE_FFTW_THREADS)
FIND_LIBRARY(FFTWL_THREADS_LIB fftw3l_threads ${FFTW_LIB_SEARCHPATH}) #Long Double Precision Lib only if compiled with threads support
ENDIF (USE_FFTW_THREADS)
IF(FFTWL_LIB)
SET(FFTWL_FOUND 1)
IF(FFTWL_THREADS_LIB)
SET(FFTWL_LIB ${FFTWF_LIB} ${FFTWF_THREADS_LIB} )
ENDIF(FFTWL_THREADS_LIB)
ENDIF(FFTWL_LIB)
ENDIF(USE_FFTWL)
IF(FFTWD_FOUND OR FFTWF_FOUND OR FFTWL_FOUND)
SET(FFTW_FOUND TRUE)
ENDIF()
ENDIF(USE_FFTWD OR USE_FFTWF OR USE_FFTWL)
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