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# File: FindFFT.cmake
# Brief: Find the FFT includes and library
# Author: Bogdan Cristea and Jed Brown
#
# Usage: Use the following line in your CMakeLists file: find_package(FFT)
#
# This script tries to find the path to FFT libraries and header files. The
# following variables are set:
# FFT_VENDOR - Possible values: ACML, MKL, FFTW3
# FFT_INCLUDES - where to find header file
# FFT_LIBRARIES - List of libraries
# FFT_FOUND - True if FFT found.
#
# The original version of this script can be found at:
# https://github.com/jedbrown/cmake-modules/blob/master/FindFFTW.cmake
#
# -------------------------------------------------------------------------
#
# Copyright (C) 1995-2012 (see AUTHORS file for a list of contributors)
#
# This file is part of IT++ - a C++ library of mathematical, signal
# processing, speech processing, and communications classes and functions.
#
# IT++ is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# IT++ is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along
# with IT++. If not, see <http://www.gnu.org/licenses/>.
#
# -------------------------------------------------------------------------
#TODO: check for fft function in each library
macro(Check_fft_Libraries LIBRARIES _prefix _name _list)
set(_libraries_work TRUE)
set(${LIBRARIES})
set(_combined_name)
if (NOT _libdir)
if (WIN32)
set(_libdir $ENV{LIB})
elseif (APPLE)
set(_libdir /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 $ENV{DYLD_LIBRARY_PATH})
else ()
set(_libdir /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 $ENV{LD_LIBRARY_PATH})
endif ()
endif ()
foreach(_library ${_list})
set(_combined_name ${_combined_name}_${_library})
if(_libraries_work)
if (BLA_STATIC)
if (WIN32)
set(CMAKE_FIND_LIBRARY_SUFFIXES .lib ${CMAKE_FIND_LIBRARY_SUFFIXES})
endif ( WIN32 )
if (APPLE)
set(CMAKE_FIND_LIBRARY_SUFFIXES .lib ${CMAKE_FIND_LIBRARY_SUFFIXES})
else (APPLE)
set(CMAKE_FIND_LIBRARY_SUFFIXES .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
endif (APPLE)
else (BLA_STATIC)
if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
# for ubuntu's libblas3gf and liblapack3gf packages
set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES} .so.3gf)
endif ()
endif (BLA_STATIC)
find_library(${_prefix}_${_library}_LIBRARY
NAMES ${_library}
PATHS ${_libdir}
)
mark_as_advanced(${_prefix}_${_library}_LIBRARY)
if (${_prefix}_${_library}_LIBRARY)
set(${LIBRARIES} ${${LIBRARIES}} ${${_prefix}_${_library}_LIBRARY})
set(_libraries_work ${${_prefix}_${_library}_LIBRARY})
endif()
endif(_libraries_work)
endforeach(_library ${_list})
if(_libraries_work)
# Test this combination of libraries.
if(UNIX AND BLA_STATIC)
set(CMAKE_REQUIRED_LIBRARIES ${_flags} "-Wl,--start-group" ${${LIBRARIES}} ${_blas} "-Wl,--end-group" ${_threads})
else(UNIX AND BLA_STATIC)
set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}} ${_blas} ${_threads})
endif(UNIX AND BLA_STATIC)
# message("DEBUG: CMAKE_REQUIRED_LIBRARIES = ${CMAKE_REQUIRED_LIBRARIES}")
if (NOT _LANGUAGES_ MATCHES Fortran)
if (BLA_VENDOR MATCHES "Intel11*")
#MKL 11
check_function_exists("${_name}" ${_prefix}${_combined_name}_WORKS)
else ()
check_function_exists("${_name}_" ${_prefix}${_combined_name}_WORKS)
endif()
else (NOT _LANGUAGES_ MATCHES Fortran)
check_fortran_function_exists(${_name} ${_prefix}${_combined_name}_WORKS)
endif (NOT _LANGUAGES_ MATCHES Fortran)
set(CMAKE_REQUIRED_LIBRARIES)
mark_as_advanced(${_prefix}${_combined_name}_WORKS)
set(_libraries_work ${${_prefix}${_combined_name}_WORKS})
#message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}")
endif(_libraries_work)
if(_libraries_work)
set(${LIBRARIES} ${${LIBRARIES}} ${_blas} ${_threads})
else(_libraries_work)
set(${LIBRARIES} FALSE)
endif(_libraries_work)
endmacro(Check_fft_Libraries)
if (FFT_INCLUDES)
# Already in cache, be silent
set (FFT_FIND_QUIETLY TRUE)
else(FFT_INCLUDES)
set (FFT_FOUND FALSE)
endif (FFT_INCLUDES)
#check for FFTW3
if (NOT FFT_FOUND)
if (BLA_VENDOR MATCHES "^ACML")
find_package(BLAS)
if (BLAS_LIBRARIES)
set (FFT_VENDOR "ACML")
set (FFT_LIBRARIES ${BLAS_LIBRARIES})
get_filename_component (PARENT_PATH ${BLAS_LIBRARIES} PATH )
find_path (FFT_INCLUDES acml.h PATH "${PARENT_PATH}/../include")
set (FFT_INCLUDES ${BLAS_INCLUDES})
endif()
elseif (BLA_VENDOR MATCHES "^Intel")
find_package(BLAS)
if (BLAS_LIBRARIES)
set (FFT_VENDOR "Intel")
set (FFT_LIBRARIES ${BLAS_LIBRARIES})
foreach (lib ${BLAS_LIBRARIES})
get_filename_component (PARENT_PATH ${lib} PATH )
find_path (FFT_INCLUDES mkl_dfti.h PATH "${PARENT_PATH}/../../include")
if (FFT_INCLUDES)
break()
endif()
endforeach()
if (FFT_INCLUDES)
find_path(TEMP_INC fftw3.h PATH ${FFT_INCLUDES}/fftw NO_DEFAULT_PATH)
if (TEMP_INC)
set(FFT_INCLUDES ${TEMP_INC} ${FFT_INCLUDES})
else()
set(FFT_INCLUDES "")
endif()
endif()
endif()
mark_as_advanced (TEMP_INC)
#need to find MKL FFT library
check_fft_libraries(
FFT_LIBRARIES
FFT
DftiCommitDescriptor
"mkl_rt"
)
else()
#check for generic FFT
find_path (FFT_INCLUDES fftw3.h)
find_library (FFT_LIBRARIES NAMES fftw3)
if (FFT_INCLUDES AND FFT_LIBRARIES)
set (FFT_VENDOR "FFTW3")
endif()
endif()
endif()
# handle the QUIETLY and REQUIRED arguments and set FFT_FOUND to TRUE if
# all listed variables are TRUE
include (FindPackageHandleStandardArgs)
find_package_handle_standard_args (FFT DEFAULT_MSG FFT_LIBRARIES FFT_INCLUDES)
if (FFT_FOUND)
message(STATUS "A library with FFT API found.")
else()
if(FFT_FIND_REQUIRED)
message(ERROR_FATAL "A required library with FFT API not found. Please specify library location.")
else()
message(STATUS "A library with FFT API not found. Please specify library location.")
endif()
endif()
if (FFT_LIBRARIES MATCHES "NOTFOUND$")
set(FFT_LIBRARIES "")
endif()
if (FFT_INCLUDES MATCHES "NOTFOUND$")
set(FFT_INCLUDES "")
endif()
mark_as_advanced (FFT_LIBRARIES FFT_INCLUDES)
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